JP2007019936A - Visible light communication system, imaging apparatus, and visible light communication preparation method and program - Google Patents

Visible light communication system, imaging apparatus, and visible light communication preparation method and program Download PDF

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JP2007019936A
JP2007019936A JP2005199988A JP2005199988A JP2007019936A JP 2007019936 A JP2007019936 A JP 2007019936A JP 2005199988 A JP2005199988 A JP 2005199988A JP 2005199988 A JP2005199988 A JP 2005199988A JP 2007019936 A JP2007019936 A JP 2007019936A
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visible light
light emission
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emission pattern
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Tadashi Kozuki
忠司 上月
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Fujifilm Holdings Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology capable of setting an environment adaptive to visible light communication. <P>SOLUTION: A photometry/range finding CPU 137 controls a zoom motor 110 to move a zoom lens 101a to a WIDE end in a step S101. When the zoom lens 101a is moved to the WIDE end, visible light signals from a communication light emission unit 16 of a transmitter side camera 100 located in the vicinity of a receiver side camera 300 can be contained within a field angle (imaging range) and the accuracy of receiving the visible light signals can be improved. The photometry/range finding CPU 137 controls a focus motor 111 to move a focus lens 101b to a NEAR point in a step S102. When the focus lens 101b is moved to the NEAR point, the visible light signals can be received in a well-focused state of the communication light emission unit 16 of the transmitter side camera 100 located in the vicinity of the receiver side camera 300 and the accuracy of receiving the visible light signals can be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は可視光通信に係り、特に撮像装置に適用可能な可視光通信に関する。   The present invention relates to visible light communication, and more particularly to visible light communication applicable to an imaging apparatus.

従来、発光手段と受光素子を利用した可視光通信が様々開発されている。例えば特許文献1によると、パルス位置変調(PPM)におけるオン/オフ位置を反転させた反転パルス位置変調(反転PPM)処理を通信データシーケンスに対して施して反転PPM信号を適用した光通信を行なう。本文献によると、例えば照明装置あるいはディスプレイ装置において可視光を適用した通信を行なう場合に、照明の照度を低下させることなく、またディスプレイの輝度レベルを低下させることなく通信を実行することが可能になる。
特開2004−72365号公報
Conventionally, various visible light communications using light emitting means and light receiving elements have been developed. For example, according to Patent Document 1, optical communication is performed by applying an inverted pulse position modulation (inverted PPM) process in which an on / off position in pulse position modulation (PPM) is inverted to a communication data sequence and applying an inverted PPM signal. . According to this document, for example, when communication using visible light is performed in a lighting device or a display device, it is possible to perform communication without reducing the illumination illuminance and without reducing the luminance level of the display. Become.
JP 2004-72365 A

ところで、可視光通信においては、発光側から受光側の位置が遠いあるいは近いため通信に不適当な場合がある。この点、特許文献1では、照明の照度を低下させず、ディスプレイの輝度レベルを低下させず通信するのであり、通信環境を良好に設定するための具体的手段は開示されていない。本発明はこのような問題点に鑑みてなされたもので、可視光通信に適した環境設定を可能にする技術を提供することを目的とする。   By the way, in visible light communication, the position on the light receiving side is far or close from the light emitting side, which may be inappropriate for communication. In this regard, in Patent Document 1, communication is performed without reducing the illuminance of the illumination and without reducing the luminance level of the display, and no specific means for setting a favorable communication environment is disclosed. The present invention has been made in view of such problems, and an object of the present invention is to provide a technique that enables environment setting suitable for visible light communication.

上記課題を解決するため、本発明に係る可視光通信システムは、R,G,Bの可視光を発光するLEDからなるLED群、LED群の発光パターンを設定する発光制御部、発光制御部の設定した発光パターンに従ってLED群の発光を制御するLEDドライバ、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する発光パターン記憶部を備え、発光制御部は所望の通信データを発光パターン記憶部のテーブルに従ってLEDドライバに設定することでLED群からR,G,Bの可視光信号を発信する可視光信号発信装置と、可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部を備える撮像装置とを有し、撮像装置は可視光信号発信装置からの可視光信号の受光に際し、可視光通信の準備動作を行う。   In order to solve the above problems, a visible light communication system according to the present invention includes an LED group composed of LEDs that emit R, G, and B visible light, a light emission control unit that sets a light emission pattern of the LED group, and a light emission control unit. An LED driver that controls the light emission of the LED group according to the set light emission pattern, and a light emission pattern storage unit that stores a table that defines the light emission pattern of the LED group corresponding to the desired communication data. The light emission control unit stores the desired communication data. A visible light signal transmitting device that transmits visible light signals of R, G, and B from the LED group by setting the LED driver according to the table of the light emission pattern storage unit, and a photographing lens that forms an image with the visible light signal transmitting device as a subject, Imaging of R, G, B by receiving R, G, B visible light signals transmitted from the LED group of the visible light signal transmitter imaged by the taking lens Image sensor that converts the signal into a signal and outputs it, an A / D converter that converts R, G, and B image signals output from the image sensor into R, G, and B image data, and an A / D converter Received light amount detection unit for detecting the received light amount for each color of the R, G, B visible light signals based on the R, G, B image data output from the LED, and the light emission pattern of the LED group corresponding to the desired communication data A light emitting pattern discriminating unit for discriminating the light emitting pattern of the LED group according to the amount of received light for each color of the R, G, B visible light signals detected by the light receiving amount detecting unit; An imaging device including a data specifying unit that specifies communication data corresponding to the light emission pattern determined by the light emission pattern determination unit according to the table of the reception side light emission pattern storage unit, and the imaging device is visible light from the visible light signal transmission device Reception of signal Upon, performing the preparation operation visible light communication.

撮影レンズはフォーカスレンズを含み、撮像装置はフォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータ、フォーカス用モータの駆動を制御する合焦制御部をさらに備えるものとすると、準備動作の具体的な態様は例えば次のようにできる。即ち、合焦制御部は可視光信号発信装置からの可視光信号の受光に際し、フォーカス用モータの駆動を制御してフォーカスレンズを至近側の端点に移動させる。   The imaging lens includes a focus lens, and the imaging device drives the focus lens to move the focus between the end point on the infinity side and the end point on the near side, and focus control that controls the driving of the focus motor If the unit is further provided, a specific aspect of the preparation operation can be performed as follows, for example. That is, when receiving the visible light signal from the visible light signal transmitter, the focusing control unit controls the driving of the focusing motor to move the focus lens to the closest end point.

撮像装置が可視光信号発信装置に近接して配置されていても、フォーカスレンズを至近側に移動させれば、可視光信号発信装置に焦点が合った状態で可視光信号を受光でき、可視光信号受信の精度が上がる。   Even if the imaging device is placed close to the visible light signal transmission device, if the focus lens is moved to the closest side, the visible light signal can be received while the visible light signal transmission device is in focus. The accuracy of signal reception increases.

あるいは、撮影レンズはズームレンズを含み、撮像装置はズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータ、ズーム用モータの駆動を制御するズーム制御部をさらに備えるものとすると、準備動作は例えば次のようにできる。即ち、ズーム制御部は可視光信号発信装置からの可視光信号の受光に際し、ズーム用モータの駆動を制御してズームレンズを広角方向へ移動させる。   Alternatively, the photographing lens includes a zoom lens, and the imaging apparatus further includes a zoom motor that drives the zoom lens to move in the telephoto direction or the wide-angle direction, and a zoom control unit that controls the driving of the zoom motor. The operation can be performed as follows, for example. That is, the zoom control unit controls the driving of the zoom motor to move the zoom lens in the wide-angle direction when receiving the visible light signal from the visible light signal transmission device.

撮像装置が可視光信号発信装置に近接して配置されていても、ズームレンズを広角方向へ移動させれば、撮像装置に近接して配置された可視光信号発信装置からの可視光信号を画角(撮像範囲)に納めることができ、可視光信号受信の精度が上がる。   Even if the imaging device is arranged close to the visible light signal transmission device, if the zoom lens is moved in the wide-angle direction, the visible light signal from the visible light signal transmission device arranged close to the imaging device is displayed. It can be stored in the corner (imaging range), and the accuracy of visible light signal reception is improved.

好ましくは、撮像装置は可視光信号発信装置にテスト発光の指示を送信する指示送信部をさらに備え、可視光信号発信装置はテスト発光指示部から送信されたテスト発光の指示を受信する指示受信部をさらに備え、発光制御部は指示受信部がテスト発光の指示を受信したことに応じて所定のテスト発光を行う。   Preferably, the imaging device further includes an instruction transmission unit that transmits a test light emission instruction to the visible light signal transmission device, and the visible light signal transmission device receives the test light emission instruction transmitted from the test light emission instruction unit. The light emission control unit performs predetermined test light emission in response to the instruction receiving unit receiving the test light emission instruction.

好ましくは、撮像装置は指示送信部によるテスト発光の指示送信後にA/D変換部から出力された画像データに基づいて撮像装置の配置が可視光通信に適しているか否かを判断する判断部をさらに備える。   Preferably, the imaging device includes a determination unit that determines whether or not the arrangement of the imaging device is suitable for visible light communication based on the image data output from the A / D conversion unit after the instruction light emission instruction is transmitted by the instruction transmission unit. Further prepare.

例えば、判断部は画像データのシャープネスを表す特徴量に基づいて撮像装置の配置が可視光通信に適しているか否かを判断する。   For example, the determination unit determines whether the arrangement of the imaging device is suitable for visible light communication based on a feature amount representing the sharpness of the image data.

シャープネスを表す特徴量は輪郭がくっきりしていることを表し、デルタヒストグラムやMTF(変調伝達関数)を用いて得られる。テスト発光の輪郭の可視光信号発信装置から発せられるテスト発光の輪郭がくっきりしていれば、それだけ適切に可視光信号を受光できると考えられるため、かかる判断に基づいて配置の適切さを判断することが望ましいといえる。   The feature amount representing sharpness represents that the contour is clear, and is obtained using a delta histogram or MTF (modulation transfer function). If the outline of the test light emission emitted from the visible light signal transmission device of the contour of the test light emission is clear, it is considered that the visible light signal can be received appropriately, so the appropriateness of the arrangement is determined based on such a determination. Is desirable.

あるいは、判断部は1画面内の所定の領域における画像データのレベルに基づいて撮像装置の配置が可視光通信に適しているか否かを判断する。   Alternatively, the determination unit determines whether the arrangement of the imaging device is suitable for visible light communication based on the level of image data in a predetermined area in one screen.

所定の領域内で画像信号が飽和していれば、可視光信号発信装置から発せられる可視光信号を画角内で完全に捉えていると考えられるため、かかる判断に基づいて配置の適切さを判断することが望ましいといえる。   If the image signal is saturated within a predetermined area, it is considered that the visible light signal emitted from the visible light signal transmitter is completely captured within the angle of view. It can be said that it is desirable to judge.

そして、可視光通信システムあるいは撮像装置は、判断部による判断の結果を通知する通知部をさらに備えることが好ましい。   And it is preferable that a visible light communication system or an imaging device is further provided with the notification part which notifies the result of judgment by a judgment part.

ユーザは、この通知に応じて可視光通信システムの配置を適宜変更することができ、可視光通信に適した配置を確保できる。   The user can appropriately change the arrangement of the visible light communication system according to the notification, and can secure the arrangement suitable for the visible light communication.

また、撮影レンズはフォーカスレンズを含み、撮像装置はA/D変換部から出力された画像データに基づいて合焦位置を検出するAF検出部、フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータ、AF検出部の検出した合焦位置にフォーカスレンズが移動するようフォーカス用モータの駆動を制御する合焦制御部をさらに備えていれば、通信準備動作として、合焦制御部は指示送信部によるテスト発光の指示送信後にAF検出部の検出した合焦位置にフォーカスレンズが移動するようフォーカス用モータの駆動を制御することが好ましい。   In addition, the photographing lens includes a focus lens, and the image pickup apparatus detects an in-focus position based on image data output from the A / D conversion unit. The focus lens is driven to focus on an infinite point. A focus motor that moves between the lens and the closest end point, and a focus control unit that controls the drive of the focus motor so that the focus lens moves to the focus position detected by the AF detection unit. As the communication preparation operation, it is preferable that the focus control unit controls the driving of the focus motor so that the focus lens moves to the in-focus position detected by the AF detection unit after the instruction transmission instruction is transmitted by the instruction transmission unit.

こうすると、可視光信号の発信源に合焦した状態で可視光信号を受光でき、可視光信号の受光精度が向上する。   In this way, the visible light signal can be received in a state in which the visible light signal transmission source is focused, and the light receiving accuracy of the visible light signal is improved.

また、撮影レンズはズームレンズを含み、撮像装置はズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータ、ズーム用モータの駆動を制御するズーム制御部をさらに備えていれば、通信準備動作として、ズーム制御部は指示送信部によるテスト発光の指示送信後に、ズーム用モータの駆動を制御して1画面中の所定の領域における画像データのレベルが所定の閾値を超えるようにズームレンズを移動させることが好ましい。   In addition, the photographing lens includes a zoom lens, and the imaging device can be communicated if it further includes a zoom motor that drives the zoom lens to move in the telephoto direction or wide-angle direction, and a zoom control unit that controls the drive of the zoom motor. As a preparatory operation, the zoom control unit controls the driving of the zoom motor after transmitting the test light emission instruction by the instruction transmission unit so that the level of the image data in a predetermined area in one screen exceeds a predetermined threshold value. Is preferably moved.

こうすると、可視光信号を画角内で捉えることができ、可視光信号の受光精度が向上する。   In this way, the visible light signal can be captured within the angle of view, and the light receiving accuracy of the visible light signal is improved.

撮像装置は、撮像素子への露光量を調整する絞り、絞りを駆動して開口径を調整する絞り駆動部、画像データに基づいて可視光信号の明るさを測光する測光部、測光部の測光した可視光信号の明るさに基づいて適正な絞り値を決定し、適正な絞り値に基づいて絞り駆動部を駆動して絞りの開口径を制御する露光制御部をさらに備えていれば、通信準備動作として、露光制御部は指示送信部によるテスト発光の指示送信後に適正な絞り値の決定及び適正な絞り値に基づいて絞り駆動部を駆動し絞りの開口径を制御することが好ましい。   The imaging apparatus includes an aperture that adjusts the exposure amount to the image sensor, an aperture drive unit that adjusts the aperture diameter by driving the aperture, a photometric unit that measures the brightness of a visible light signal based on image data, and photometry of the photometric unit If an exposure control unit that determines an appropriate aperture value based on the brightness of the visible light signal and drives the aperture drive unit based on the appropriate aperture value to control the aperture diameter of the aperture is further provided. As a preparatory operation, it is preferable that the exposure control unit controls the aperture diameter of the aperture by driving the aperture driving unit based on the determination of an appropriate aperture value and the appropriate aperture value after transmitting the test light emission command by the command transmission unit.

こうすることで可視光信号受光量のオーバー・アンダーを防げる。   By doing this, it is possible to prevent over / under of the amount of received visible light signal.

なお、撮像装置は可視光通信開始の入力操作を受け付ける通信開始操作部をさらに備え、かつ通信開始操作部が可視光通信開始の入力操作を受け付けた際に可視光通信の準備動作を行うとよい。   The imaging apparatus may further include a communication start operation unit that receives an input operation for starting visible light communication, and may perform a preparation operation for visible light communication when the communication start operation unit receives an input operation for starting visible light communication. .

本発明に係る撮像装置は、フォーカスレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータ、可視光信号発信装置からの可視光信号の受光に際し、フォーカス用モータの駆動を制御してフォーカスレンズを至近側の端点に移動させる合焦制御部を備える。   An imaging device according to the present invention includes a focus lens, and forms a visible light signal transmission device that emits visible light signals of R, G, and B from a group of LEDs as a subject. An image sensor that receives R, G, and B visible light signals transmitted from the LED group of the optical signal transmitter, converts them into R, G, and B image signals and outputs them, and R, G, An A / D converter that converts the B imaging signal into R, G, and B image data and outputs the image data, and R, G, and B based on the R, G, and B image data output from the A / D converter Detection unit for detecting the amount of received light for each color of the visible light signal, receiving side light emission pattern storage unit for storing a table defining the light emission pattern of the LED group corresponding to desired communication data, detection of the light reception amount detection unit R, G and B visible light signals received for each color A light emission pattern discriminating unit that discriminates the light emission pattern of the LED group according to the amount, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and driving the focus lens The focus motor that moves the focal point between the end point on the infinity side and the end point on the near side, and when the visible light signal is received from the visible light signal transmission device, the focus motor is controlled by controlling the drive of the focus motor. A focusing control unit for moving to the end point on the side.

本発明に係る撮像装置は、ズームレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータ、可視光信号発信装置からの可視光信号の受光に際し、ズーム用モータの駆動を制御してズームレンズを広角方向へ移動させるズーム制御部を備える。   An imaging apparatus according to the present invention includes a zoom lens, and includes a photographic lens that forms an image of a visible light signal transmission device that emits visible light signals of R, G, and B from an LED group, and a visible image formed by the photographic lens. An image sensor that receives R, G, and B visible light signals transmitted from the LED group of the optical signal transmitter, converts them into R, G, and B image signals and outputs them, and R, G, An A / D converter that converts the B imaging signal into R, G, and B image data and outputs the image data, and R, G, and B based on the R, G, and B image data output from the A / D converter Detection unit for detecting the amount of received light for each color of the visible light signal, receiving side light emission pattern storage unit for storing a table defining the light emission pattern of the LED group corresponding to desired communication data, detection of the light reception amount detection unit Received R, G, B visible light signal for each color Accordingly, the light emission pattern discriminating unit for discriminating the light emission pattern of the LED group, the data specifying unit for specifying the communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and the zoom lens are driven. A zoom motor that moves in the telephoto direction or wide angle direction, and a zoom control unit that controls the drive of the zoom motor and moves the zoom lens in the wide angle direction when receiving a visible light signal from the visible light signal transmission device.

本発明に係る撮像装置は、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、可視光信号発信装置からの可視光信号の受光に際し、A/D変換部から出力された画像データに基づいて撮像装置の配置が可視光通信に適しているか否かを判断する判断部を備える。   An imaging device according to the present invention includes a photographing lens that forms an image of a visible light signal transmission device that emits visible light signals of R, G, and B from an LED group as a subject, and a visible light signal transmission device that is imaged by the photographing lens. An image sensor that receives R, G, and B visible light signals transmitted from the LED group, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor An A / D conversion unit that converts and outputs R, G, and B image data, and R, G, and B visible light signals based on R, G, and B image data output from the A / D conversion unit A received light amount detecting unit for detecting the received light amount for each color, a receiving side light emitting pattern storage unit for storing a table defining a light emitting pattern of the LED group corresponding to desired communication data, and R, G, detected by the received light amount detecting unit LED emission according to the amount of light received for each color of the visible light signal of B A light emission pattern discriminating unit for discriminating a pattern, a data specifying unit for specifying communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and a visible light signal from the visible light signal transmitting device When receiving light, a determination unit is provided that determines whether the arrangement of the imaging device is suitable for visible light communication based on the image data output from the A / D conversion unit.

本発明に係る撮像装置は、フォーカスレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、A/D変換部から出力された画像データに基づいて合焦位置を検出するAF検出部、フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータ、可視光信号発信装置からの可視光信号の受光に際し、AF検出部の検出した合焦位置にフォーカスレンズが移動するようフォーカス用モータの駆動を制御する合焦制御部を備える。   An imaging device according to the present invention includes a focus lens, and forms a visible light signal transmission device that emits visible light signals of R, G, and B from a group of LEDs as a subject. An image sensor that receives R, G, and B visible light signals transmitted from the LED group of the optical signal transmitter, converts them into R, G, and B image signals and outputs them, and R, G, An A / D converter that converts the B imaging signal into R, G, and B image data and outputs the image data, and R, G, and B based on the R, G, and B image data output from the A / D converter Detection unit for detecting the amount of received light for each color of the visible light signal, receiving side light emission pattern storage unit for storing a table defining the light emission pattern of the LED group corresponding to desired communication data, detection of the light reception amount detection unit R, G and B visible light signals received for each color A light emission pattern discriminating unit that discriminates the light emission pattern of the LED group according to the amount, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and an A / D conversion unit AF detection unit that detects the in-focus position based on image data output from the motor, a focus motor that drives the focus lens to move the focal point between the end point on the infinity side and the end point on the near side, visible light signal When receiving a visible light signal from the transmission device, a focus control unit is provided for controlling the driving of the focus motor so that the focus lens moves to the focus position detected by the AF detection unit.

本発明に係る撮像装置は、ズームレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータ、可視光信号発信装置からの可視光信号の受光に際し、ズーム用モータの駆動を制御して1画面中の所定の領域における画像データのレベルが所定の閾値を超えるようにズームレンズを移動させるズーム制御部を備える。   An imaging apparatus according to the present invention includes a zoom lens, and includes a photographic lens that forms an image of a visible light signal transmission device that emits visible light signals of R, G, and B from an LED group, and a visible image formed by the photographic lens. An image sensor that receives R, G, and B visible light signals transmitted from the LED group of the optical signal transmitter, converts them into R, G, and B image signals and outputs them, and R, G, An A / D converter that converts the B imaging signal into R, G, and B image data and outputs the image data, and R, G, and B based on the R, G, and B image data output from the A / D converter Detection unit for detecting the amount of received light for each color of the visible light signal, receiving side light emission pattern storage unit for storing a table defining the light emission pattern of the LED group corresponding to desired communication data, detection of the light reception amount detection unit Received R, G, B visible light signal for each color Accordingly, the light emission pattern discriminating unit for discriminating the light emission pattern of the LED group, the data specifying unit for specifying the communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and the zoom lens are driven. When receiving a visible light signal from a zoom motor or a visible light signal transmitter that moves in a telephoto direction or a wide-angle direction, the level of image data in a predetermined region in one screen is controlled by controlling the driving of the zoom motor. A zoom control unit that moves the zoom lens so as to exceed the threshold value is provided.

本発明に係る撮像装置は、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、撮像素子への露光量を調整する絞り、絞りを駆動して開口径を調整する絞り駆動部、画像データに基づいて可視光信号の明るさを測光する測光部、測光部の測光した可視光信号の明るさに基づいて適正な絞り値を決定し、適正な絞り値に基づいて絞り駆動部を駆動して絞りの開口径を制御する露光制御部を備え、露光制御部は可視光信号発信装置からの可視光信号の受光に際し、適正な絞り値の決定及び適正な絞り値に基づいて絞り駆動部を駆動し絞りの開口径を制御する。   An imaging device according to the present invention includes a photographing lens that forms an image of a visible light signal transmission device that emits visible light signals of R, G, and B from an LED group as a subject, and a visible light signal transmission device that is imaged by the photographing lens. An image sensor that receives R, G, and B visible light signals transmitted from the LED group, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor An A / D conversion unit that converts and outputs R, G, and B image data, and R, G, and B visible light signals based on R, G, and B image data output from the A / D conversion unit A received light amount detecting unit for detecting the received light amount for each color, a receiving side light emitting pattern storage unit for storing a table defining a light emitting pattern of the LED group corresponding to desired communication data, and R, G, detected by the received light amount detecting unit LED emission according to the amount of light received for each color of the visible light signal of B A light emission pattern discriminating unit for discriminating a pattern, a data specifying unit for specifying communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emitting pattern storage unit, a diaphragm for adjusting the exposure amount to the image sensor, An aperture drive unit that adjusts the aperture diameter by driving the aperture, a metering unit that measures the brightness of the visible light signal based on the image data, and an appropriate aperture value based on the brightness of the visible light signal measured by the photometry unit And an exposure control unit that controls the aperture diameter of the aperture by driving the aperture drive unit based on an appropriate aperture value, and the exposure control unit receives the visible light signal from the visible light signal transmission device. Based on the determination of the aperture value and the appropriate aperture value, the aperture drive unit is driven to control the aperture diameter of the aperture.

本発明に係る可視光通信準備方法は、フォーカスレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータを備える撮像装置で用いられる可視光通信準備方法であって、可視光信号発信装置からの可視光信号の受光に際し、フォーカス用モータの駆動を制御してフォーカスレンズを至近側の端点に移動させるステップを含む。   A visible light communication preparation method according to the present invention includes a focus lens, and forms an image by a photographing lens that forms an image of a visible light signal transmission device that emits R, G, and B visible light signals from an LED group as a subject. The R, G, B visible light signals transmitted from the LED group of the visible light signal transmitting device received, converted into R, G, B imaging signals and output, and the R output from the imaging device , G, B imaging signals are converted into R, G, B image data and output, and R, G, B image data output from the A / D converter R, A received light amount detection unit for detecting the received light amount for each color of the G and B visible light signals, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and a received light amount detection Of R, G and B visible light signals detected by A light emission pattern discriminating unit that discriminates the light emission pattern of the LED group according to the amount of received light, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and a focus lens Is a visible light communication preparation method used in an imaging device including a focusing motor that moves a focal point between an end point on the infinity side and an end point on the near side by driving a visible light from a visible light signal transmission device When receiving the signal, the method includes a step of controlling the driving of the focus motor to move the focus lens to the end point on the closest side.

本発明に係る可視光通信準備方法は、ズームレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータを備える撮像装置で用いられる可視光通信準備方法であって、可視光信号発信装置からの可視光信号の受光に際し、ズーム用モータの駆動を制御してズームレンズを広角方向へ移動させるステップを含む。   The visible light communication preparation method according to the present invention includes a zoom lens and forms an image by a photographing lens that forms an image of a visible light signal transmission device that emits R, G, and B visible light signals from an LED group as a subject. The R, G, B visible light signals transmitted from the LED group of the visible light signal transmitting device received, converted into R, G, B imaging signals and output, and the R output from the imaging device , G, B imaging signals are converted into R, G, B image data and output, and R, G, B image data output from the A / D converter R, A received light amount detection unit for detecting the received light amount for each color of the G and B visible light signals, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and a received light amount detection Color of R, G, B visible light signals detected by A light emission pattern discriminating unit that discriminates the light emission pattern of the LED group according to the amount of received light, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and a zoom lens A visible light communication preparation method used in an imaging device including a zoom motor that is driven to move in a telephoto direction or a wide-angle direction, and driving a zoom motor when receiving a visible light signal from a visible light signal transmission device And controlling to move the zoom lens in the wide-angle direction.

本発明に係る可視光通信準備方法は、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部を備える撮像装置で用いられる可視光通信準備方法であって、可視光信号発信装置からの可視光信号の受光に際し、A/D変換部から出力された画像データに基づいて撮像装置の配置が可視光通信に適しているか否かを判断するステップを含む。   The visible light communication preparation method according to the present invention includes a photographing lens that forms an image of a visible light signal transmission device that emits visible light signals of R, G, and B from an LED group, and a visible light signal formed by the photographing lens. An image sensor that receives R, G, and B visible light signals transmitted from the LED group of the transmitter, converts them into R, G, and B image signals and outputs them, and R, G, and B signals that are output from the image sensor An A / D converter that converts an imaging signal into R, G, and B image data and outputs the image data, and R, G, and B visible based on R, G, and B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color of the optical signal, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and an R detected by the received light amount detection unit , G, and B according to the amount of received light for each color of visible light signal Visible pattern used in an imaging device including a light emission pattern determination unit that determines a light emission pattern of group D, and a data specifying unit that specifies communication data corresponding to the light emission pattern determined by the light emission pattern determination unit according to the table of the reception side light emission pattern storage unit Whether or not the arrangement of the imaging device is suitable for visible light communication based on the image data output from the A / D converter when receiving a visible light signal from the visible light signal transmission device. The step of judging is included.

本発明に係る可視光通信準備方法は、フォーカスレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、A/D変換部から出力された画像データに基づいて合焦位置を検出するAF検出部、フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータを備える撮像装置で用いられる可視光通信準備方法であって、可視光信号発信装置からの可視光信号の受光に際し、AF検出部の検出した合焦位置にフォーカスレンズが移動するようフォーカス用モータの駆動を制御するステップを含む。   A visible light communication preparation method according to the present invention includes a focus lens, and forms an image by a photographing lens that forms an image of a visible light signal transmission device that emits R, G, and B visible light signals from an LED group as a subject. The R, G, B visible light signals transmitted from the LED group of the visible light signal transmitting device received, converted into R, G, B imaging signals and output, and the R output from the imaging device , G, B imaging signals are converted into R, G, B image data and output, and R, G, B image data output from the A / D converter R, A received light amount detection unit for detecting the received light amount for each color of the G and B visible light signals, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and a received light amount detection Of R, G and B visible light signals detected by A light emission pattern discriminating unit that discriminates the light emission pattern of the LED group according to the amount of received light, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit; An AF detection unit for detecting a focus position based on image data output from the D conversion unit, and a focus motor for driving the focus lens to move the focal point between the end point on the infinity side and the end point on the closest side A method for preparing a visible light communication used in an imaging apparatus provided with the focus motor driving so that a focus lens moves to a focus position detected by an AF detection unit when receiving a visible light signal from a visible light signal transmission device The step of controlling is included.

本発明に係る可視光通信準備方法は、ズームレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータを備える撮像装置で用いられる可視光通信準備方法であって、可視光信号発信装置からの可視光信号の受光に際し、ズーム用モータの駆動を制御して1画面中の所定の領域における画像データのレベルが所定の閾値を超えるようにズームレンズを移動させるステップを含む。   The visible light communication preparation method according to the present invention includes a zoom lens and forms an image by a photographing lens that forms an image of a visible light signal transmission device that emits R, G, and B visible light signals from an LED group as a subject. The R, G, B visible light signals transmitted from the LED group of the visible light signal transmitting device received, converted into R, G, B imaging signals and output, and the R output from the imaging device , G, B imaging signals are converted into R, G, B image data and output, and R, G, B image data output from the A / D converter R, A received light amount detection unit for detecting the received light amount for each color of the G and B visible light signals, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and a received light amount detection Color of R, G, B visible light signals detected by A light emission pattern discriminating unit that discriminates the light emission pattern of the LED group according to the amount of received light, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and a zoom lens A visible light communication preparation method used in an imaging device including a zoom motor that is driven to move in a telephoto direction or a wide-angle direction, and driving a zoom motor when receiving a visible light signal from a visible light signal transmission device And a step of moving the zoom lens so that the level of the image data in a predetermined area in one screen exceeds a predetermined threshold.

本発明に係る可視光通信準備方法は、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、A/D変換部から出力されたR,G,Bの画像データに基づいてR,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応するLED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従ってLED群の発光パターンを判別する発光パターン判別部、受側発光パターン記憶部のテーブルに従って発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、撮像素子への露光量を調整する絞り、絞りを駆動して開口径を調整する絞り駆動部、画像データに基づいて可視光信号の明るさを測光する測光部、測光部の測光した可視光信号の明るさに基づいて適正な絞り値を決定し、適正な絞り値に基づいて絞り駆動部を駆動して絞りの開口径を制御する露光制御部を備える撮像装置で用いられる可視光通信準備方法であって、可視光信号発信装置からの可視光信号の受光に際し、適正な絞り値の決定及び適正な絞り値に基づいて絞り駆動部を駆動し絞りの開口径を制御するステップを含む。   The visible light communication preparation method according to the present invention includes a photographing lens that forms an image of a visible light signal transmission device that emits visible light signals of R, G, and B from an LED group, and a visible light signal formed by the photographing lens. An image sensor that receives R, G, and B visible light signals transmitted from the LED group of the transmitter, converts them into R, G, and B image signals and outputs them, and R, G, and B signals that are output from the image sensor An A / D converter that converts an imaging signal into R, G, and B image data and outputs the image data, and R, G, and B visible based on R, G, and B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color of the optical signal, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and an R detected by the received light amount detection unit , G, and B according to the amount of received light for each color of visible light signal A light emission pattern discriminating unit for discriminating the light emission pattern of the D group, a data specifying unit for specifying communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, and an exposure amount to the image sensor Aperture to be adjusted, Aperture drive unit that drives the aperture to adjust the aperture diameter, Photometric unit that measures the brightness of the visible light signal based on image data, Appropriate based on the brightness of the visible light signal measured by the photometric unit A visible light communication preparation method used in an imaging device including an exposure control unit that determines an appropriate aperture value and drives an aperture drive unit based on an appropriate aperture value to control an aperture diameter of the aperture. When receiving a visible light signal from the transmitter, the method includes determining an appropriate aperture value and driving the aperture drive unit based on the appropriate aperture value to control the aperture diameter of the aperture.

上述の可視光通信準備方法をコンピュータに実行させるための可視光通信準備プログラムも本発明に含まれる。   A visible light communication preparation program for causing a computer to execute the above-described visible light communication preparation method is also included in the present invention.

本発明に係る撮影準備動作によれば、可視光信号受光に際してフォーカスレンズを至近側の端点に移動させる。こうすれば、撮像装置に近接して配置された可視光信号発信装置に合焦した状態で通信を開始でき、可視光信号受信の精度が上がる。   According to the photographing preparation operation according to the present invention, the focus lens is moved to the closest end point when the visible light signal is received. In this way, communication can be started in a state in which the visible light signal transmission device disposed close to the imaging device is focused, and the accuracy of visible light signal reception is improved.

あるいは、本発明に係る撮影準備動作によれば、フォーカスレンズを検出された合焦位置に移動させる。このため、可視光信号発信装置に合焦した状態で通信を開始することができる。   Alternatively, according to the shooting preparation operation according to the present invention, the focus lens is moved to the detected focus position. For this reason, communication can be started in the state which focused on the visible light signal transmitter.

あるいは、本発明に係る撮影準備動作によれば、可視光信号受光に際してズームレンズを広角方向へ移動させる。こうすれば、撮像装置に近接して配置された可視光信号発信装置からの可視光信号を画角(撮像範囲)に納めることができ、可視光信号受信の精度が上がる。   Alternatively, according to the photographing preparation operation according to the present invention, the zoom lens is moved in the wide-angle direction when the visible light signal is received. In this way, the visible light signal from the visible light signal transmission device arranged close to the imaging device can be stored within the angle of view (imaging range), and the accuracy of visible light signal reception is increased.

あるいは、本発明に係る撮影準備動作によれば、可視光信号受光に際して1画面中の所定の領域における画像データのレベルが所定の閾値を超えるようにズームレンズを移動させる。こうすれば、可視光信号発信装置からの可視光信号を画角内で捉えることができ、可視光信号受信の精度が上がる。   Alternatively, according to the photographing preparation operation according to the present invention, the zoom lens is moved so that the level of the image data in a predetermined area in one screen exceeds a predetermined threshold when the visible light signal is received. In this way, the visible light signal from the visible light signal transmission device can be captured within the angle of view, and the accuracy of visible light signal reception increases.

また、本発明に係る撮影準備動作によれば、可視光信号受光に際して絞りの開口径を制御する。こうすれば可視光信号受光量のオーバー・アンダーを防げる。   Further, according to the photographing preparation operation according to the present invention, the aperture diameter of the diaphragm is controlled when the visible light signal is received. In this way, over / under of the amount of visible light signal reception can be prevented.

そして、本発明に係る撮影準備動作では、可視光通信システムの配置の適切さを判断しその結果を通知するから、この通知に応じてユーザが適宜配置を変更し、可視光通信に適した配置を確保できる。   In the shooting preparation operation according to the present invention, the appropriateness of the arrangement of the visible light communication system is determined and the result is notified, so that the user appropriately changes the arrangement in accordance with this notification, and the arrangement suitable for visible light communication. Can be secured.

以下、添付した図面を参照し本発明の好ましい実施の形態を説明する。   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

<第1実施形態>
図1は本発明に係る可視光信号発信装置の好ましい一実施形態である発信側デジタルカメラ100(以下発側カメラ100と略す)のブロック図である。発側カメラ100にはユーザがこの発側カメラ100を使用するときに種々の操作を行なうための操作部120が設けられている。この操作部120には、発側カメラ100を作動させるための電源投入用の電源スイッチ121、撮影モードと再生モードと可視光通信モードとを自在に切り替える切替レバー122、オート撮影やマニュアル撮影等を選択するための撮影モードダイヤル123、各種のメニューの設定や選択あるいはズームを行なうための十字キー124、閃光発光用スイッチ125、および十字キー124で選択されたメニューの実行やキャンセル等を行なうための情報位置指定キー126、上下方向に操作可能なレバースイッチで構成され、該スイッチを上方向に操作することで望遠(TELE)方向にズーム移動し、下方向に操作することで広角(WIDE)方向にズーム移動するズームスイッチ127が備えられている。
<First Embodiment>
FIG. 1 is a block diagram of a transmission side digital camera 100 (hereinafter abbreviated as a transmission side camera 100) which is a preferred embodiment of a visible light signal transmission device according to the present invention. The originating camera 100 is provided with an operation unit 120 for performing various operations when the user uses the originating camera 100. The operation unit 120 includes a power switch 121 for turning on the power for operating the originating camera 100, a switching lever 122 for freely switching between a photographing mode, a reproduction mode, and a visible light communication mode, auto photographing, manual photographing, and the like. A shooting mode dial 123 for selecting, a cross key 124 for setting, selecting or zooming various menus, a flashing switch 125, and executing or canceling the menu selected with the cross key 124. It is composed of an information position designation key 126 and a lever switch that can be operated in the vertical direction. By operating the switch in the upward direction, the zoom is moved in the telephoto (TELE) direction, and by operating in the downward direction, the wide angle (WIDE) direction. A zoom switch 127 for zooming is provided.

また、発側カメラ100には、撮影画像や再生画像等を表示するための画像表示LCD102と、操作の手助けを行なうための操作LCD表示103が備えられている。   Further, the originating camera 100 is provided with an image display LCD 102 for displaying a photographed image, a reproduced image, and the like, and an operation LCD display 103 for assisting the operation.

この発側カメラ100にはレリーズスイッチ104が配備されている。このレリーズスイッチ104によって撮影の開始指示がメインCPU20へと伝えられる。この発側カメラ100では切替レバー122によって撮影と再生と可視光通信の切り替えが自在になっていて、撮影を行なうときにはユーザによって切替レバー122が撮影側に切り替えられ、再生を行なうときには切替レバー122が再生側に切り替えられ、可視光通信を行うときは切替レバー122が可視光通信側に切り替えられる。また、発側カメラ100には、閃光を発光する閃光発光管105aを有する閃光発光装置が配備されている。   The originating camera 100 is provided with a release switch 104. The release switch 104 transmits a shooting start instruction to the main CPU 20. In the originating camera 100, the switching lever 122 can freely switch between shooting, reproduction, and visible light communication. The user switches the switching lever 122 to the shooting side when shooting, and the switching lever 122 switches when shooting. When switching to the reproduction side and performing visible light communication, the switching lever 122 is switched to the visible light communication side. Further, the light emitting side camera 100 is provided with a flash light emitting device having a flash light emitting tube 105a that emits flash light.

また、発側カメラ100には、撮影レンズ101と、撮影レンズ101を経由して結像された被写体像をアナログの画像信号に変換する撮像素子であるCCDセンサ132とが備えられている。   In addition, the originating camera 100 includes a photographing lens 101 and a CCD sensor 132 that is an image sensor that converts a subject image formed via the photographing lens 101 into an analog image signal.

撮影レンズ101は、ズームレンズ101a,フォーカスレンズ101b、絞り131を備えており、ズーミングを行うズーム用モータ110と、焦点調整を行うフォーカス用モータ111と、絞り調整を行う絞り用モータ112により、それぞれが駆動される。   The photographing lens 101 includes a zoom lens 101a, a focus lens 101b, and a diaphragm 131. A zoom motor 110 that performs zooming, a focus motor 111 that performs focus adjustment, and a diaphragm motor 112 that performs diaphragm adjustment, respectively. Is driven.

CCDセンサ132は、詳細には、そのCCDセンサ132に照射された被写体光により発生した電荷を可変の電荷蓄積時間(露光期間)の間蓄積することにより画像信号を生成するものである。CCD132からは、CG部136から出力される垂直同期信号VDに同期したタイミングでフレーム毎の画像信号が順次出力される。   More specifically, the CCD sensor 132 generates an image signal by accumulating charges generated by subject light irradiated to the CCD sensor 132 for a variable charge accumulation time (exposure period). The CCD 132 sequentially outputs image signals for each frame at a timing synchronized with the vertical synchronization signal VD output from the CG unit 136.

図2に示すように、CCD132の受光面にはR,G,Bの微小なカラーフィルタがマトリクス状に配列されており、R,G,Bの各色成分を含む撮像信号は、白バランス・γ処理部133で適当なレベルに増幅された後、A/D部134によってR,G,Bの各画像データとされる。なお、CCD132の画素配置はベイヤ型を例に図示したが、ハニカム型等各種の配列方式を採用でき、図示されたものに限定されない。   As shown in FIG. 2, minute color filters of R, G, and B are arranged in a matrix on the light receiving surface of the CCD 132, and an image pickup signal including each color component of R, G, and B has a white balance / γ After being amplified to an appropriate level by the processing unit 133, the A / D unit 134 converts the image data into R, G, and B images. The pixel arrangement of the CCD 132 is illustrated by taking a Bayer type as an example, but various arrangement methods such as a honeycomb type can be adopted and are not limited to those illustrated.

撮像素子にCCDセンサ132を用いた場合には、色偽信号やモアレ縞等の発生を防止するために、入射光内の不要な高周波成分を除去する光学的ローパスフィルタ132aが配設されている。また、入射光内の赤外線を吸収若しくは反射して、長波長域で感度が高いCCDセンサ132固有の感度特性を補正する赤外カットフィルタ132bが配設されている。光学的ローパスフィルタ132a及び赤外カットフィルタ132bの具体的な配設の態様は様々であり、例えば本出願人による特許公開2000−114502号公報0003〜0004段落に記載のようにすることができる。   When the CCD sensor 132 is used as the image sensor, an optical low-pass filter 132a that removes unnecessary high-frequency components in the incident light is disposed in order to prevent generation of color false signals, moire fringes, and the like. . In addition, an infrared cut filter 132b that absorbs or reflects infrared light in incident light and corrects a sensitivity characteristic unique to the CCD sensor 132 having high sensitivity in a long wavelength region is provided. There are various specific arrangement modes of the optical low-pass filter 132a and the infrared cut filter 132b. For example, the arrangement can be as described in paragraphs 0003 to 0004 of Japanese Patent Publication No. 2000-114502 by the present applicant.

また、発側カメラ100には、CCDセンサ132からのアナログ画像信号が表わす被写体像のホワイトバランスを合わせるとともにその被写体像の階調特性における直線の傾き(γ)を調整し、さらにアナログ画像信号を増幅する増幅率可変の増幅器を含む白バランス・γ処理部133が備えられている。   Further, the source camera 100 adjusts the white balance of the subject image represented by the analog image signal from the CCD sensor 132 and adjusts the slope (γ) of the straight line in the gradation characteristic of the subject image, and further receives the analog image signal. A white balance / γ processing unit 133 including an amplification variable amplifier for amplification is provided.

さらに、発側カメラ100には、白バランス・γ処理部133からのアナログ信号をディジタルのR,G,B画像データにA/D変換するA/D部134と、そのA/D部134からのR,G,B画像データを格納するバッファメモリ135が備えられている。   Further, the originating camera 100 includes an A / D unit 134 for A / D converting analog signals from the white balance / γ processing unit 133 into digital R, G, B image data, and the A / D unit 134. A buffer memory 135 for storing R, G, B image data is provided.

本実施形態では、A/D部134は、8ビットの量子化分解能を有し、白バランス・γ処理部133から出力されるアナログR,G,B撮像信号を、CCDセンサ132の受光量に応じ、レベル0〜255のR,G,Bデジタル画像データに変換して出力する。以下、CCD132のR,G,Bの受光量に応じたR,G,Bデジタル画像データのレベルも受光量と呼ぶ。ただし、この量子化分解能はあくまで一例であって本発明に必須の値ではない。   In this embodiment, the A / D unit 134 has an 8-bit quantization resolution, and the analog R, G, B imaging signals output from the white balance / γ processing unit 133 are used as the received light amount of the CCD sensor 132. Accordingly, it is converted into R, G, B digital image data of levels 0 to 255 and output. Hereinafter, the level of R, G, B digital image data corresponding to the received light amount of R, G, B of the CCD 132 is also referred to as received light amount. However, this quantization resolution is merely an example and is not an essential value for the present invention.

また、発側カメラ100には、CG(クロックジェネレータ)部136と、測光・測距用CPU137と、充電・発光制御部138と、通信制御部139と、YC処理部140と、電源電池68とが備えられている。   The originating camera 100 also includes a CG (clock generator) unit 136, a photometry / ranging CPU 137, a charge / emission control unit 138, a communication control unit 139, a YC processing unit 140, and a power battery 68. Is provided.

CG部136は、CCDセンサ132を駆動するための垂直同期信号VD,高速掃き出しパルスPを含む駆動信号、白バランス・γ処理部133,A/D部134を制御する制御信号、および通信制御部139を制御する制御信号を出力する。また、このCG部136には、測光・測距用CPU137からの制御信号が入力される。   The CG unit 136 includes a vertical synchronization signal VD for driving the CCD sensor 132, a drive signal including a high-speed sweep pulse P, a control signal for controlling the white balance / γ processing unit 133, the A / D unit 134, and a communication control unit. A control signal for controlling 139 is output. Further, a control signal from the photometry / ranging CPU 137 is input to the CG unit 136.

測光・測距用CPU137は、ズーム用モータ110、フォーカス用モータ111、絞り調整を行う絞り用モータ112を制御してズームレンズ101a、フォーカスレンズ101b、絞り131をそれぞれ駆動することにより測距を行ない、CG部136および充電・発光制御部138を制御する。ズーム用モータ110、フォーカス用モータ111、絞り用モータ112の駆動は、モータドライバ62によって制御され、モータドライバ62の制御コマンドは、測光・測距用CPU137あるいはCPU20から送られる。   The photometry / ranging CPU 137 measures the distance by controlling the zoom motor 110, the focus motor 111, and the aperture motor 112 for adjusting the aperture to drive the zoom lens 101a, the focus lens 101b, and the aperture 131, respectively. The CG unit 136 and the charge / light emission control unit 138 are controlled. Driving of the zoom motor 110, the focus motor 111, and the aperture motor 112 is controlled by the motor driver 62, and a control command for the motor driver 62 is sent from the photometry / ranging CPU 137 or the CPU 20.

測光・測距用CPU137は、レリーズスイッチ104が半押しされると、CCD132によって周期的(1/30秒から1/60秒ごと)に得られる画像データに基づいて被写体の明るさの測光(EV値の算出)を行う。   When the release switch 104 is half-pressed, the photometry / ranging CPU 137 measures the brightness of the subject (EV) based on the image data periodically (every 1/30 seconds to 1/60 seconds) obtained by the CCD 132. Value calculation).

即ち、AE演算部151は、A/D変換部134から出力されたR、G、Bの画像信号を積算し、その積算値を測光・測距用CPU137に提供する。測光・測距用CPU137は、AE演算部151から入力する積算値に基づいて被写体の平均的な明るさ(被写体輝度)を検出し、撮影に適した露出値(EV値)を算出する。   That is, the AE calculation unit 151 integrates the R, G, and B image signals output from the A / D conversion unit 134 and provides the integrated values to the photometry / ranging CPU 137. The photometry / ranging CPU 137 detects the average brightness (subject brightness) of the subject based on the integrated value input from the AE calculation unit 151, and calculates an exposure value (EV value) suitable for photographing.

そして、測光・測距用CPU137は、得られたEV値に基づいて絞り131の絞り値(F値)及びCCD132の電子シャッタ(シャッタスピード)を含む露出値を所定のプログラム線図にしたがって決定する。   Then, the photometry / ranging CPU 137 determines the exposure value including the aperture value (F value) of the aperture 131 and the electronic shutter (shutter speed) of the CCD 132 based on the obtained EV value according to a predetermined program diagram. .

レリーズスイッチ104が全押しされると、測光・測距用CPU137は、その決定した絞り値に基づいて絞り131を駆動し、絞り131の開口径を制御するとともに、決定したシャッタスピードに基づき、CG136を介してCCD132での電荷蓄積時間を制御する(AE動作)。   When the release switch 104 is fully pressed, the photometry / ranging CPU 137 drives the aperture 131 based on the determined aperture value, controls the aperture diameter of the aperture 131, and controls the CG 136 based on the determined shutter speed. The charge accumulation time in the CCD 132 is controlled via the AE (AE operation).

AE動作は、絞り優先AE,シャッタ速度優先AE,プログラムAEなどがあるが、いずれにおいても、被写体輝度を測定し、この被写体輝度の測光値に基づいて決められた露出値、すなわち絞り値とシャッタスピードとの組み合わせで撮影を行うことにより、適正な露光量で撮像されるように制御しており、面倒な露出決定の手間を省くことができる。   The AE operation includes an aperture priority AE, a shutter speed priority AE, a program AE, etc. In any case, the subject brightness is measured, and an exposure value determined based on the photometric value of the subject brightness, that is, an aperture value and a shutter. By taking a picture in combination with the speed, control is performed so that an image is taken with an appropriate exposure amount, and it is possible to save troublesome determination of exposure.

AF検出部150は、測光・測距CPU137により選定された検出範囲に対応する画像データをA/D変換部134から抽出する。焦点位置を検出する方法は、合焦位置で画像データの高周波成分が最大振幅になるという特徴を利用して行う。AF検出部150は、抽出された画像データの高周波成分を1フィールド期間積分することにより、振幅値を算出する。AF検出部150は、測光・測距CPU137がフォーカス用モータ110を駆動制御してフォーカスレンズ101aを可動範囲内、即ち無限遠側の端点(INF点)から至近側の端点(NEAR点)の間で移動させている間に順次振幅値の計算を実行し、最大振幅を検出した時に検出値を測光・測距CPU137に送信する。   The AF detection unit 150 extracts image data corresponding to the detection range selected by the photometry / ranging CPU 137 from the A / D conversion unit 134. The method of detecting the focal position is performed using the feature that the high frequency component of the image data has the maximum amplitude at the in-focus position. The AF detection unit 150 calculates an amplitude value by integrating the high-frequency component of the extracted image data for one field period. The AF detector 150 is configured such that the photometry / ranging CPU 137 drives and controls the focus motor 110 to move the focus lens 101a within the movable range, that is, between the end point on the infinity side (INF point) and the end point on the near side (NEAR point). When the maximum amplitude is detected, the detection value is transmitted to the photometry / ranging CPU 137 when the maximum amplitude is detected.

測光・測距CPU137は、この検出値を取得して対応する合焦位置に、フォーカスレンズ101bを移動させるようにフォーカス用モータ111に指令を出す。フォーカス用モータ111は、測光・測距CPU137の指令に応じてフォーカスレンズ101bを合焦位置に移動させる(AF動作)。   The photometry / ranging CPU 137 obtains this detection value and issues a command to the focus motor 111 to move the focus lens 101b to the corresponding in-focus position. The focus motor 111 moves the focus lens 101b to the in-focus position in accordance with a command from the photometry / ranging CPU 137 (AF operation).

測光・測距用CPU137は、メインCPU20とのCPU間通信によってレリーズスイッチ104と接続されており、ユーザによりレリーズスイッチ104が半押しされた時に、この合焦位置の検出が行われる。また、測光・測距用CPU137には、ズーム用モータ111が接続されており、メインCPU20が、ズームスイッチ127によってユーザからのTELE方向又はWIDE方向へのズームの指令を取得した場合に、ズーム用モータ110を駆動させることにより、ズームレンズ101aをWIDE端とTELE端との間で移動させる。   The photometry / ranging CPU 137 is connected to the release switch 104 through inter-CPU communication with the main CPU 20, and the in-focus position is detected when the release switch 104 is half-pressed by the user. Further, a zoom motor 111 is connected to the photometry / ranging CPU 137, and when the main CPU 20 obtains a zoom command in the TELE direction or WIDE direction from the user by the zoom switch 127, the zoom motor 111 is used. By driving the motor 110, the zoom lens 101a is moved between the WIDE end and the TELE end.

充電・発光制御部138は,閃光発光管105aを発光させるために電源電池68からの電力の供給を受けて図示しない閃光発光用のコンデンサを充電したり、その閃光発光管105aの発光を制御する。   The charge / light emission control unit 138 is supplied with power from the power supply battery 68 to emit light from the flash light emission tube 105a, charges a flash light emission capacitor (not shown), and controls light emission from the flash light emission tube 105a. .

通信制御部139には、通信ポート107が備えられており、この通信制御部139は、発側カメラ100により撮影された被写体の画像信号をUSB端子が備えられたパーソナルコンピュータ等の外部装置に出力し、およびこのような外部装置から発側カメラ100に画像信号を入力することにより、その外部装置との間のデータ通信を担うものである。また、この発側カメラ100は、ロール状の写真フイルムに写真撮影を行なう通常のカメラが有するISO感度100,200,400,1600等に切り替える機能を模擬した機能を有し、ISO感度400以上に切り替えられた場合、白バランス・γ処理部133の増幅器の増幅率が所定の増幅率を越えた高増幅率に設定された高感度モードとなる。   The communication control unit 139 includes a communication port 107, and the communication control unit 139 outputs an image signal of a subject photographed by the originating camera 100 to an external device such as a personal computer equipped with a USB terminal. In addition, by inputting an image signal from such an external device to the originating camera 100, data communication with the external device is performed. The originating camera 100 has a function that simulates the ISO sensitivity 100, 200, 400, 1600, etc. of a normal camera that takes a photograph in a roll-shaped photographic film, and has an ISO sensitivity of 400 or more. When switched, the high-sensitivity mode is set in which the amplification factor of the amplifier of the white balance / γ processing unit 133 is set to a high amplification factor exceeding a predetermined amplification factor.

また、発側カメラ100には、圧縮・伸長&ID抽出部143と、I/F部144が備えられている。圧縮・伸長&ID抽出部143は、バッファメモリ135に格納された画像データを、バスライン142を介して読み出して圧縮し、I/F部144を経由してメモリカード200に格納する。また、圧縮・伸長&ID抽出部143は、メモリカード200に格納された画像データの読み出しにあたり、メモリカード200固有の識別番号(ID)を抽出し、そのメモリカード200に格納された画像データを読み出して伸長し、バッファメモリ135に格納する。   Further, the originating camera 100 includes a compression / decompression & ID extraction unit 143 and an I / F unit 144. The compression / decompression & ID extraction unit 143 reads and compresses the image data stored in the buffer memory 135 via the bus line 142 and stores the image data in the memory card 200 via the I / F unit 144. In addition, the compression / decompression & ID extraction unit 143 extracts an identification number (ID) unique to the memory card 200 and reads the image data stored in the memory card 200 when reading the image data stored in the memory card 200. Are decompressed and stored in the buffer memory 135.

また、発側カメラ100には、メインCPU20と、EEPROM146と、YC/RGB変換部147と、表示用のドライバ148とが備えられている。メインCPU20は、この発側カメラ100全体の制御を行なう。EEPROM146には、この発側カメラ100固有の固体データやプログラム等が格納されている。YC/RGB変換部147は、YC処理部140で生成されたカラー映像信号YCを3色のRGB信号に変換して表示用のドライバ148を経由して画像表示LCD102に出力する。   In addition, the originating camera 100 includes a main CPU 20, an EEPROM 146, a YC / RGB conversion unit 147, and a display driver 148. The main CPU 20 controls the entire originating camera 100. The EEPROM 146 stores solid data and programs unique to the originating camera 100. The YC / RGB conversion unit 147 converts the color video signal YC generated by the YC processing unit 140 into RGB signals of three colors, and outputs them to the image display LCD 102 via the display driver 148.

発側カメラ100は、赤外線受光回路63を備える。赤外線受光回路63は、入射した赤外線信号をデジタル信号に変換してメインCPU20へ出力する。   The originating camera 100 includes an infrared light receiving circuit 63. The infrared light receiving circuit 63 converts the incident infrared signal into a digital signal and outputs the digital signal to the main CPU 20.

なお、発側カメラ100は、CCD132によって赤外線信号を受光することも可能である。即ち、赤外光が光学的ローパスフィルタ132aを透過してCCD132の受光面に達すれば、CCD132が受光した赤外光を白色光として電荷蓄積する特性を利用し、赤外線受光回路63の代用とする。これにより、CCD132は、可視光信号の他、赤外線信号も検出可能であり、赤外線受光回路63のような特段の構成は省略可能である。   Note that the originating camera 100 can also receive an infrared signal by the CCD 132. That is, if infrared light passes through the optical low-pass filter 132a and reaches the light receiving surface of the CCD 132, the infrared light received by the CCD 132 is used as white light, and the infrared light receiving circuit 63 is used as a substitute. . Thereby, the CCD 132 can detect an infrared signal in addition to a visible light signal, and a special configuration such as the infrared light receiving circuit 63 can be omitted.

また、発側カメラ100は、AC電源から電力を得るためのACアダプタ48と電源電池68とが着脱可能な構成となっている。電源電池68は充電可能な二次電池、例えばニカド電池、ニッケル水素電池、リチウムイオン電池で構成される。電源電池68は使い切り型の一次電池、例えばリチウム電池、アルカリ電池で構成してもよい。電源電池68は図示しない電池収納室に装填することにより、発側カメラ100の各回路と電気的に接続される。   In addition, the originating camera 100 has a configuration in which an AC adapter 48 for obtaining power from an AC power supply and a power supply battery 68 are detachable. The power supply battery 68 is composed of a rechargeable secondary battery such as a nickel-cadmium battery, a nickel metal hydride battery, or a lithium ion battery. The power supply battery 68 may be a single-use primary battery such as a lithium battery or an alkaline battery. The power supply battery 68 is electrically connected to each circuit of the source camera 100 by being loaded into a battery storage chamber (not shown).

ACアダプタ48が発側カメラ100に装填されAC電源からACアダプタ48を介して発側カメラ100に電力が供給される場合には、電源電池68が電池収納室に装填されている場合であっても、優先的に当該ACアダプタ48から出力された電力が発側カメラ100の各部に駆動用の電力として供給される。また、ACアダプタ48が装填されておらず、かつ電源電池68が電池収納室に装填されている場合には、当該電源電池68から出力された電力が発側カメラ100の各部に駆動用の電力として供給される。   The case where the AC adapter 48 is loaded in the originating camera 100 and power is supplied from the AC power source to the originating camera 100 via the AC adapter 48 is when the power battery 68 is loaded in the battery storage chamber. In addition, the power output from the AC adapter 48 is preferentially supplied to each part of the source camera 100 as driving power. In addition, when the AC adapter 48 is not loaded and the power battery 68 is loaded in the battery storage chamber, the power output from the power battery 68 is used as driving power for each part of the source camera 100. Supplied as

なお、図示しないが、発側カメラ100には、電池収納室内に収納される電源電池68とは別にバックアップ電池が設けられている。内蔵バックアップ電池には例えば専用の二次電池が用いられ、電源電池68によって充電される。バックアップ電池は、電源電池68の交換や取り外し等、電源電池68が電池収納室に装填されていない場合、発側カメラ100の基本機能に給電する。   Although not shown, the originating camera 100 is provided with a backup battery separately from the power supply battery 68 housed in the battery housing chamber. For example, a dedicated secondary battery is used as the built-in backup battery and is charged by the power supply battery 68. The backup battery supplies power to the basic function of the source camera 100 when the power battery 68 is not loaded in the battery storage chamber, such as when the power battery 68 is replaced or removed.

即ち、電源電池68又はACアダプタ48からの電源供給が停止すると、バックアップ電池がスイッチング回路(図示せず)によってRTC15等に接続され、これらの回路に給電する。これにより、バックアップ電池29が寿命に達しない限り、RTC15等の基本機能には、電源供給が間断なく継続する。   That is, when the power supply from the power supply battery 68 or the AC adapter 48 is stopped, the backup battery is connected to the RTC 15 or the like by a switching circuit (not shown) and supplies power to these circuits. As a result, as long as the backup battery 29 does not reach the end of its life, power supply continues to the basic functions such as the RTC 15 without interruption.

RTC(Real Time Clock)15は計時専用のチップであり、電源電池68やACアダプタ48からの給電がオフされていてもバックアップ電池から電源供給を受けて継続的に動作する。   An RTC (Real Time Clock) 15 is a chip dedicated to timekeeping, and continuously operates by receiving power supply from the backup battery even when power supply from the power supply battery 68 or the AC adapter 48 is turned off.

図3は通信用発光装置16のブロック図である。この通信用発光部16には、パターンテーブル記憶部12、発光制御CPU14、LED群17(R、G、BのLED17R、17G、17B)、調光センサ18、LEDドライバ19が設けられている。   FIG. 3 is a block diagram of the communication light emitting device 16. The communication light emitting unit 16 includes a pattern table storage unit 12, a light emission control CPU 14, an LED group 17 (R, G, B LEDs 17R, 17G, 17B), a light control sensor 18, and an LED driver 19.

LEDドライバ19は、発光制御CPU14から、発光パターン、発光タイミング、発光時間、発光量などを示す発光制御信号を取り込んでいる。LED群17の発光パターンは不揮発性メモリなどの各種記憶媒体で構成されるパターンテーブル記憶部12に予め記憶されている。   The LED driver 19 takes in a light emission control signal indicating a light emission pattern, a light emission timing, a light emission time, a light emission amount, and the like from the light emission control CPU 14. The light emission pattern of the LED group 17 is stored in advance in the pattern table storage unit 12 including various storage media such as a nonvolatile memory.

発光制御CPU14がLEDドライバ19に設定する発光タイミングは、CG136から出力されるクロック信号である発信駆動信号に同期している。   The light emission timing set in the LED driver 19 by the light emission control CPU 14 is synchronized with a transmission drive signal that is a clock signal output from the CG 136.

LEDドライバ19は発光制御CPU14からの制御信号に従ってLED群17を制御し、LED17R、17G、17Bの発光パターン、発光タイミング、発光時間、発光量を制御する。R、G、BのLED17R、17G、17Bの電気エネルギーは電源電池68又はACアダプタ48から供給される。   The LED driver 19 controls the LED group 17 in accordance with a control signal from the light emission control CPU 14, and controls the light emission pattern, light emission timing, light emission time, and light emission amount of the LEDs 17R, 17G, and 17B. The electrical energy of the R, G, B LEDs 17R, 17G, 17B is supplied from the power supply battery 68 or the AC adapter 48.

LED群17が発光すると、発光制御CPU14は、調光センサ18を介して発光量を検知する。そして、この検知した発光量が発光量調整用の基準値と一致すると、発光を停止させるために発光停止信号をLEDドライバ19に出力する。LEDドライバ19は、発光制御CPU14から発光停止信号を入力すると、LED群17の発光を停止させるよう制御する。これにより、電源電池68からLED群17に流れる電流が遮断され、LED群17の発光が停止する。   When the LED group 17 emits light, the light emission control CPU 14 detects the light emission amount via the light control sensor 18. When the detected light emission amount matches the reference value for adjusting the light emission amount, a light emission stop signal is output to the LED driver 19 in order to stop the light emission. When the light emission stop signal is input from the light emission control CPU 14, the LED driver 19 controls to stop the light emission of the LED group 17. Thereby, the electric current which flows into the LED group 17 from the power supply battery 68 is interrupted | blocked, and light emission of the LED group 17 stops.

なお、図示しないが、通信用発光部16の構成は、閃光発光装置の構成、あるいは従来のタリーランプやAF補助光及びその発光制御装置の構成の全部又は一部と共通させてもよい。例えば、発光制御CPU14と測光・測距用CPU137を同一のCPUとしてもよい。あるいは、LED17R、17G、17Bの全部又は一部をタリーランプ等と共通の構成としてもよい。こうすると、従来のデジタルカメラに特別の機器を設けることなく、本発明に係る可視光信号発信装置を実現できる。   Although not shown, the configuration of the communication light emitting unit 16 may be made common to all or part of the configuration of the flash light emitting device or the conventional tally lamp, AF auxiliary light, and the light emission control device. For example, the light emission control CPU 14 and the photometry / ranging CPU 137 may be the same CPU. Alternatively, all or part of the LEDs 17R, 17G, and 17B may be configured in common with a tally lamp or the like. In this way, the visible light signal transmission device according to the present invention can be realized without providing a special device in the conventional digital camera.

図4は本発明に係る撮像装置の好ましい一実施形態である受信側デジタルカメラ300(以下受側カメラ300と略す)のブロック構成図である。この図において、発側カメラ100と同一のブロックに関しては同一の符号を付し、その構成及び機能は上記と基本的に同一であるものとして説明は省略する。   FIG. 4 is a block diagram of a receiving-side digital camera 300 (hereinafter abbreviated as receiving-side camera 300), which is a preferred embodiment of the imaging apparatus according to the present invention. In this figure, the same blocks as those of the originating camera 100 are denoted by the same reference numerals, and the configuration and function thereof are basically the same as described above, and the description thereof is omitted.

受側カメラ300のCCD132は、発側カメラ100の通信用発光装置16から発光されるR,G,Bの可視光を受光する。CCD132の受光した可視光はR,G,Bの画像信号に変換されて白バランス・γ処理部133に出力され、所定の処理が施された後、A/D変換部134でR,G,Bの画像データに変換されるのは前述の通りである。   The CCD 132 of the receiving camera 300 receives R, G, B visible light emitted from the communication light emitting device 16 of the emitting camera 100. Visible light received by the CCD 132 is converted into R, G, B image signals and output to the white balance / γ processing unit 133, subjected to predetermined processing, and then subjected to R, G, B in the A / D conversion unit 134. The conversion to the B image data is as described above.

A/D部134によって得られたR,G,B画像データは、AF検出部150にも入力される。AF検出部150は、R,G,B画像データを1画面の所定の分割エリア毎にかつ同じ色成分毎に積算平均し、さらにフレームごとに、全エリアあるいは所定の領域のR,G,B画像データの積算平均値Ir,Ig,Ibを算出する。この積算平均値Ir,Ig,IbをR,G,Bの可視光の受光量とする。   The R, G, B image data obtained by the A / D unit 134 is also input to the AF detection unit 150. The AF detection unit 150 averages the R, G, B image data for each predetermined divided area of the screen and for each same color component, and further, R, G, B for all areas or a predetermined region for each frame. The integrated average values Ir, Ig, and Ib of the image data are calculated. The integrated average values Ir, Ig, and Ib are used as the amounts of R, G, and B visible light received.

ただし、R,G,Bの可視光の受光量Ir,Ig,Ib(まとめて受光量Rで表すこともある)は、R、G、Bの可視光にそれぞれ感度を有するCCD132以外の受光センサ(図示せず)によって検出することも可能である。   However, R, G, and B visible light receiving amounts Ir, Ig, and Ib (sometimes collectively referred to as received light amounts R) are light receiving sensors other than the CCD 132 having sensitivity to R, G, and B visible lights, respectively. It is also possible to detect by (not shown).

受側カメラ300は、赤外線信号発信部30を備えている。この赤外線信号発信部30は、発側カメラ100に赤外線信号を赤外光によって発信するものであり、その構成は、例えば、閃光発光装置の構成、従来のタリーランプ及びその発光制御装置の構成の全部又は一部と共通させてもよい。あるいは、赤外線通信専用の発信装置で構成してもよい。   The receiving camera 300 includes an infrared signal transmitter 30. The infrared signal transmitting unit 30 transmits an infrared signal to the emitting camera 100 by infrared light. The configuration of the infrared signal transmitting unit 30 includes, for example, a configuration of a flash light emitting device, a configuration of a conventional tally lamp and a light emission control device thereof. You may make it common with all or one part. Or you may comprise by the transmission apparatus only for infrared communication.

図5に示すように、本発明に係る通信システム500は、発側カメラ100と受側カメラ300を備える。発側カメラ100は、通信用発光装置16が受側カメラ300のCCD132受光面と相対するように配置される。この場合、受側カメラ300のCCD132が通信用発光装置16から発信される可視光信号を良好に受光するため、発側カメラ100と受側カメラ300は近接して配置されることが好ましい。   As shown in FIG. 5, a communication system 500 according to the present invention includes an originating camera 100 and a receiving camera 300. The emitting camera 100 is disposed such that the communication light emitting device 16 faces the light receiving surface of the CCD 132 of the receiving camera 300. In this case, in order for the CCD 132 of the receiving camera 300 to receive a visible light signal transmitted from the communication light emitting device 16 satisfactorily, the emitting camera 100 and the receiving camera 300 are preferably disposed close to each other.

通信システム500の通信動作は次のように行われる。   The communication operation of the communication system 500 is performed as follows.

図6は通信動作の概略を示すフローチャートである。まず、発側カメラ100、受側カメラ300のそれぞれの切替レバー122が可視光通信側に切り替えられると、発側カメラ100、受側カメラ300のメインCPU20は、これに応じてそれぞれ通信準備動作を開始する(S0,1)。通信準備動作の詳細は後述する。通信準備動作が終了すると、メインCPU20は、赤外線信号発信部30を制御して発光命令を送信する(S2)。   FIG. 6 is a flowchart showing an outline of the communication operation. First, when the switching levers 122 of the originating camera 100 and the receiving camera 300 are switched to the visible light communication side, the main CPU 20 of the originating camera 100 and the receiving camera 300 performs a communication preparation operation accordingly. Start (S0, 1). Details of the communication preparation operation will be described later. When the communication preparation operation is completed, the main CPU 20 controls the infrared signal transmitter 30 to transmit a light emission command (S2).

受側カメラ300は、赤外線信号受光回路63によって発光命令を受信すると、メインCPU20は、2進数のビット列からなる所望の通信データをバスライン142を介して発光制御CPU14に送る。発光制御CPU14は、通信データを受け取ると、発光制御CPU14は、受け取ったビット列を開始ビットから3ビットごとに分割する(S3)。この3ビット列を分割ビット列と呼ぶ。分割ビット列は3桁の2進数であり、2=8パターンを表す8進数と等価である。なお、通信データの末尾から3ビットに満たないビット列が生じた場合、欠損したビットに「0」を付加して強制的に3ビットの分割ビット列にする。 When the receiving camera 300 receives the light emission command by the infrared signal light receiving circuit 63, the main CPU 20 sends desired communication data including a binary bit string to the light emission control CPU 14 via the bus line 142. When the light emission control CPU 14 receives the communication data, the light emission control CPU 14 divides the received bit string every 3 bits from the start bit (S3). This 3-bit string is called a divided bit string. The divided bit string is a three-digit binary number, and is equivalent to an octal number representing 2 3 = 8 patterns. When a bit string less than 3 bits is generated from the end of the communication data, “0” is added to the missing bit to forcibly form a divided bit string of 3 bits.

次に、発光制御CPU14は、パターンテーブル記憶部12に記憶されたパターンテーブル(図7参照)を参照し、分割ビット列ごとにR,G,Bのパルスのハイ(H)又はロー(L)をLEDドライバ19に設定する(S4)。   Next, the light emission control CPU 14 refers to the pattern table (see FIG. 7) stored in the pattern table storage unit 12 and sets the high (H) or low (L) of the R, G, B pulse for each divided bit string. The LED driver 19 is set (S4).

なお、発光量、発光時間も合わせて設定されるが、その値は任意である。また、パターンテーブルの内容は図7に示したものに限定されない。   The light emission amount and the light emission time are also set, but the values are arbitrary. Further, the contents of the pattern table are not limited to those shown in FIG.

ここで、発光制御CPU14のパルス設定周期、即ちCG部136による発信駆動信号の発生周期は、受側カメラ300のCCD132の電荷蓄積期間(露光期間)と同期させることが好ましいが、その具体的態様については説明を省略する。   Here, the pulse setting cycle of the light emission control CPU 14, that is, the generation cycle of the transmission drive signal by the CG unit 136 is preferably synchronized with the charge accumulation period (exposure period) of the CCD 132 of the receiving camera 300. Description of is omitted.

LEDドライバ19は、R,G,Bのパルス設定に応じたタイミングでLED群17を発光させる(S5)。   The LED driver 19 causes the LED group 17 to emit light at a timing according to the R, G, and B pulse settings (S5).

例えば、通信データのビット列が110001であれば、まずビット列を開始ビットから3ビットごとに「110」、「001」に分割する。次に、パターンテーブルに従い、分割ビット列「110」については、Rのパルスをハイ,Gのパルスをハイ、Bのパルスをローに設定する(図8参照)。この場合、LED17RとLED17Bは設定された発光量・発光時間で発光するが、LED17Gは発光しない。   For example, if the bit string of communication data is 110001, the bit string is first divided into “110” and “001” every 3 bits from the start bit. Next, according to the pattern table, for the divided bit string “110”, the R pulse is set high, the G pulse is set high, and the B pulse is set low (see FIG. 8). In this case, the LED 17R and the LED 17B emit light with the set light emission amount and light emission time, but the LED 17G does not emit light.

以下、LED群17の発光により光学的に発信される通信データを可視光信号と呼ぶ。   Hereinafter, communication data optically transmitted by the light emission of the LED group 17 is referred to as a visible light signal.

再び図6を参照すると、受側カメラ300は、通信用発光装置16から発信された可視光信号をCCD132によって受光する(S6)。   Referring to FIG. 6 again, the receiving camera 300 receives the visible light signal transmitted from the communication light emitting device 16 by the CCD 132 (S6).

受側カメラ300のメインCPU20は、受光した可視光信号の発光パターンを判別する(S7)。即ち、メインCPU20は、CCD132の受光した可視光について積算部150の算出した全画面又は所定の領域内の受光量Ir,Ig,Ibを入力し、受光量Ir,Ig,Ibが所定の閾値Xを上回っているかもしくは下回っているかを各受光量について判断する。ある色の受光量Ir,Ig,Ibについて閾値Xを上回っていれば、その色は発光(H)と判断し、閾値Xを下回っていれば、その色は非発光(L)と判断する(図9参照)。   The main CPU 20 of the receiving camera 300 determines the light emission pattern of the received visible light signal (S7). That is, the main CPU 20 inputs the received light amounts Ir, Ig, and Ib in the entire screen or a predetermined area calculated by the integrating unit 150 for the visible light received by the CCD 132, and the received light amounts Ir, Ig, and Ib are set to the predetermined threshold value X. It is determined for each received light amount whether it is above or below. If the received light amount Ir, Ig, Ib of a certain color exceeds the threshold value X, it is determined that the color is light emission (H), and if it is below the threshold value X, the color is determined to be non-light emission (L) ( (See FIG. 9).

なお、所定の閾値Xは、A/D変換部134のビット分解能がレベル0〜255であり、LED17R,LED17B,LED17Gのフル発光によって得られる画像データの受光量の最大レベルが150であれば、X=75とすることが一例として考えられる。   If the bit resolution of the A / D converter 134 is level 0 to 255 and the maximum level of received light amount of image data obtained by full light emission of the LED 17R, LED 17B, and LED 17G is 150, the predetermined threshold value X is 150. One example is to set X = 75.

そして、予めEEPROM146に記憶されているパターンテーブル(発側カメラ100に記憶されているものと同じ)に従い、R,G,BのH又はLの発光パターンに対応した分割ビット列を特定する(S7)。例えば、図9に示すようなRGB可視光を受光すれば、「110」の分割ビット列が復元される。   Then, in accordance with a pattern table stored in the EEPROM 146 in advance (the same as that stored in the source camera 100), a divided bit string corresponding to the H, L light emission pattern of R, G, B is specified (S7). . For example, when RGB visible light as shown in FIG. 9 is received, the divided bit string “110” is restored.

この処理はRGBの可視光の発光周期に同期して繰り返されるが、この繰り返しの周期は、RGBの発光周期がCCD132の電荷蓄積期間と同期していれば、1フレームの画像信号が読み出される周期と同じになり、理論的には最大の通信速度となる。   This process is repeated in synchronization with the light emission period of RGB visible light. This repetition period is a period in which an image signal of one frame is read out if the light emission period of RGB is synchronized with the charge accumulation period of the CCD 132. Theoretically, the maximum communication speed is obtained.

そして、発光周期に従って順次受光する可視光信号の各々から特定した分割ビット列を受光順に配列したビット列を通信データとして復元する(S8)。   Then, a bit string in which the divided bit strings specified from the visible light signals sequentially received according to the light emission period are arranged in the light receiving order is restored as communication data (S8).

即ち、この通信システム500では、LED群17の1回の発光によって3ビットの2進数データ(8進数と等価)を表現でき、従来のオンオフキーイングによる光通信に比して1回の発光当たり3倍のデータを送信できる。   That is, in this communication system 500, 3-bit binary data (equivalent to octal) can be expressed by one light emission of the LED group 17, and 3 per light emission as compared with the conventional optical communication by on-off keying. Double the data can be transmitted.

次に、通信準備動作の詳細を説明する。   Next, details of the communication preparation operation will be described.

図10は第1実施形態に係る通信準備動作の一例を示すフローチャートである。この通信準備動作は受側カメラ300のS1の動作の具体的内容となる。なお、本実施形態では、発側カメラ100のS0における動作を特に規定する必要はない。   FIG. 10 is a flowchart illustrating an example of a communication preparation operation according to the first embodiment. This communication preparation operation is a specific content of the operation of S1 of the receiving camera 300. In the present embodiment, it is not necessary to particularly define the operation of the originating camera 100 at S0.

S101では、測光・測距CPU137は、ズーム用モータ110を制御し、ズームレンズ101aをWIDE端へ移動させる。ズームレンズ101aをWIDE端へ移動させれば、受側カメラ300に近接して配置された発側カメラ100の通信用発光装置16からの可視光信号を画角(撮像範囲)内に納めることができ、可視光信号受信の精度が上がる。   In S101, the photometry / ranging CPU 137 controls the zoom motor 110 to move the zoom lens 101a to the WIDE end. If the zoom lens 101a is moved to the WIDE end, the visible light signal from the communication light emitting device 16 of the originating camera 100 arranged in the vicinity of the receiving camera 300 can be kept within the angle of view (imaging range). This increases the accuracy of visible light signal reception.

S102では、測光・測距CPU137は、フォーカス用モータ111を制御し、フォーカスレンズ101bをNEAR点に移動させる。フォーカスレンズ101bをNEAR点に移動させれば、受側カメラ300に近接して配置された発側カメラ100の通信用発光装置16に焦点が合った状態で可視光信号を受光でき、可視光信号受信の精度が上がる。   In S102, the photometry / ranging CPU 137 controls the focus motor 111 to move the focus lens 101b to the NEAR point. If the focus lens 101b is moved to the NEAR point, the visible light signal can be received in a state where the communication light emitting device 16 of the originating camera 100 disposed close to the receiving camera 300 is in focus. Increases the accuracy of reception.

なお、この通信準備動作においては、S101又はS102のいずれか一方を実行してもよい。   In this communication preparation operation, either S101 or S102 may be executed.

<第2実施形態>
第1実施形態の通信準備動作では、発側カメラ100と受側カメラ300は近接して配置されることを前提としている。しかし、実際には、ユーザが発側カメラ100と受側カメラ300とを離して置いていまい、そのままでは良好に可視光信号を受光できない場合もある。
Second Embodiment
In the communication preparation operation of the first embodiment, it is assumed that the originating camera 100 and the receiving camera 300 are arranged close to each other. However, in practice, the user may leave the originating camera 100 and the receiving camera 300 apart, and may not be able to receive a visible light signal satisfactorily.

このため、本実施形態に係る通信準備動作では、ユーザに発側カメラ100と受側カメラ300の適切な配置を促すべく、位置変更の必要性を通知する。   For this reason, in the communication preparation operation according to the present embodiment, the user is notified of the necessity of position change in order to prompt the user to appropriately arrange the originating camera 100 and the receiving camera 300.

図11は第2実施形態に係る通信準備動作の流れを示すフローチャートである。   FIG. 11 is a flowchart showing the flow of the communication preparation operation according to the second embodiment.

まず、受側カメラ300のメインCPU20は、赤外線信号発信部30を制御してテスト発光命令を送信する(S201)。   First, the main CPU 20 of the receiving camera 300 controls the infrared signal transmitter 30 to transmit a test light emission command (S201).

発側カメラ100は、赤外線受光回路63によってテスト発光命令を受信する(S202)。発側カメラ100は、テスト発光命令を受信したことに応じてテスト発光を行う(S203)。テスト発光の発光パターンは特に限定されないが、例えば、LED17R,G,Bのそれぞれを、パターンテーブル(図7参照)で規定される発光パターンを全て網羅するよう、順次、所定の発光量で発光させる。   The emitting camera 100 receives a test light emission command by the infrared light receiving circuit 63 (S202). In response to the reception of the test emission command, the source camera 100 performs a test emission (S203). The light emission pattern of the test light emission is not particularly limited. For example, each of the LEDs 17R, G, and B is sequentially made to emit light at a predetermined light emission amount so as to cover all the light emission patterns defined by the pattern table (see FIG. 7). .

受側カメラ300は、CCD132によってテスト発光を受光する(S204)。受側カメラ300のメインCPU20は、この受光に応じてA/D変換部134から出力得られた画像データに基づき、発側カメラ100に対する受側カメラ300の配置が適切であるか否かを判断する(S205)。   The receiving camera 300 receives the test light emission by the CCD 132 (S204). The main CPU 20 of the receiving camera 300 determines whether or not the receiving camera 300 is appropriately arranged with respect to the emitting camera 100 based on the image data output from the A / D conversion unit 134 in response to the received light. (S205).

この判断は、例えば、図12に示すように、1画面I内の所定の領域Z(ここでは中央4エリア)における画像データのシャープネスを表す特徴量fが所定の閾値を超えているか否かを判断することにより行う。特徴量fは、デルタヒストグラムやMTF(変調伝達関数)を用いて得られる各種のシャープネス指標である。特徴量fは、その値が大きいほど画像の高周波成分が多く、その領域の輪郭がくっきりしていることを表している。通信用発光装置16から発せられるテスト発光の輪郭がくっきりしていれば、それだけ適切に可視光信号を受光できると考えられるため、かかる判断に基づいて配置の適切さを判断することが望ましいといえる。   For example, as shown in FIG. 12, this determination is made as to whether or not the feature amount f representing the sharpness of the image data in a predetermined area Z (here, the central four areas) in one screen I exceeds a predetermined threshold value. It is done by judging. The feature amount f is various sharpness indexes obtained using a delta histogram or MTF (modulation transfer function). The feature amount f indicates that the higher the value, the more high-frequency components of the image and the sharper the contour of the region. If the outline of the test light emission emitted from the communication light-emitting device 16 is clear, it can be considered that the visible light signal can be received appropriately. Therefore, it can be said that it is desirable to determine the appropriateness of arrangement based on this determination. .

あるいは、この判断は、例えば、1画面I内の所定の領域Zにおける画像データのレベルが飽和(具体的には画像データのレベルが所定の閾値、例えば130を超えている)しているか否かを判断することで行うことができる。所定の領域Z内で画像信号が飽和していれば、通信用発光装置16から発せられる可視光信号を画角内で完全に捉えていると考えられるため、かかる判断に基づいて配置の適切さを判断することが望ましいといえる。   Alternatively, this determination is made, for example, whether or not the level of the image data in a predetermined region Z in one screen I is saturated (specifically, the level of the image data exceeds a predetermined threshold, for example, 130). It can be done by judging. If the image signal is saturated within the predetermined region Z, it is considered that the visible light signal emitted from the communication light emitting device 16 is completely captured within the angle of view. It can be said that it is desirable to judge.

そして、この場合、所定の領域Zにおける受光量をIr,Ig,Ibとすれば、周囲の発光源の影響を極力排除でき、可視光信号のみの受光量を可及的に正確に得ることができる。   In this case, if the received light amount in the predetermined region Z is Ir, Ig, Ib, the influence of the surrounding light source can be eliminated as much as possible, and the received light amount of only the visible light signal can be obtained as accurately as possible. it can.

ここで、受側カメラ300のメインCPU20は、配置が適切でないと判断した場合、各種の通知手段を制御し、発側カメラ100・受側カメラ300を適切な位置に移動させる必要がある旨をユーザに通知する(S206)。この通知は、操作LCD表示103への文字等の表示、画像表示LCD102への文字やアイコン等の表示、図示しないスピーカからの音声再生、警告ランプの点滅、バイブレーションの作動などで行われる。   Here, if the main CPU 20 of the receiving camera 300 determines that the arrangement is not appropriate, the main CPU 20 controls various notification means to indicate that it is necessary to move the originating camera 100 and the receiving camera 300 to appropriate positions. The user is notified (S206). This notification is performed by displaying characters or the like on the operation LCD display 103, displaying characters or icons on the image display LCD 102, reproducing sound from a speaker (not shown), blinking a warning lamp, or operating a vibration.

一方、受側カメラ300のメインCPU20は、配置が適切であると判断した場合、各種の通知手段を制御し、通信準備が完了した旨をユーザに通知する(S207)。この動作の後、通信動作のS2に進み、可視光信号の発受信が行われる。   On the other hand, when determining that the arrangement is appropriate, the main CPU 20 of the receiving camera 300 controls various notification means and notifies the user that the communication preparation is completed (S207). After this operation, the process proceeds to S2 of the communication operation, where visible light signals are transmitted and received.

なお、S201〜S206の動作は、S205で配置が適切であると判断されるまで繰り返される。ユーザは、この間、発側カメラ100あるいは受側カメラ300の配置を適宜変更する。適切な配置になればS207でその旨が通知されるから、ユーザはその位置で通信システム500の配置変更を完了する。こうすることで可視光通信に適した配置を確保できる。   The operations in S201 to S206 are repeated until it is determined in S205 that the arrangement is appropriate. During this time, the user changes the arrangement of the originating camera 100 or the receiving camera 300 as appropriate. If an appropriate arrangement is obtained, this is notified in S207, and the user completes the arrangement change of the communication system 500 at that position. By doing so, an arrangement suitable for visible light communication can be secured.

<第3実施形態>
第2実施形態では可視光通信に適した環境設定はユーザの配置変更動作のみに依存していたが、これに加え、受側カメラ300に可視光通信に適した自動設定を補助的に行わせてもよい。
<Third Embodiment>
In the second embodiment, the environment setting suitable for visible light communication depends only on the user's arrangement changing operation, but in addition to this, the receiving camera 300 performs auxiliary setting suitable for visible light communication as an auxiliary. May be.

図13は第3実施形態に係る通信準備動作の流れを示すフローチャートである。   FIG. 13 is a flowchart showing a flow of a communication preparation operation according to the third embodiment.

まず、受側カメラ300のメインCPU20は、赤外線信号発信部30を制御してテスト発光命令を送信する(S401)。   First, the main CPU 20 of the receiving camera 300 controls the infrared signal transmitter 30 to transmit a test light emission command (S401).

発側カメラ100は、赤外線受光回路63によってテスト発光命令を受信する(S402)。発側カメラ100は、テスト発光命令を受信したことに応じてテスト発光を行う(S403)。テスト発光の発光パターンは特に限定されない。   The emitting camera 100 receives a test light emission command by the infrared light receiving circuit 63 (S402). The originating camera 100 performs test light emission in response to receiving the test light emission command (S403). The light emission pattern of the test light emission is not particularly limited.

受側カメラ300は、CCD132によってテスト発光を受光する(S404)。なお、このテスト発光は、少なくとも後述のS408が開始するまでは継続するものとする。   The receiving camera 300 receives the test light emission by the CCD 132 (S404). Note that this test light emission continues until at least S408 described later starts.

受側カメラ300は、テスト発光の受光に応じ、可視光信号の受光に適した設定を行う(S405)。   In response to the test light emission, the receiving camera 300 performs settings suitable for the reception of the visible light signal (S405).

受側カメラ300のメインCPU20は、A/D変換部134から得られた画像データに基づき、発側カメラ100に対する受側カメラ300の配置が適切であるか否かを判断する(S406)。この判断は、第2実施形態のS205と同様である。   Based on the image data obtained from the A / D conversion unit 134, the main CPU 20 of the receiving camera 300 determines whether or not the receiving camera 300 is properly positioned with respect to the originating camera 100 (S406). This determination is the same as S205 in the second embodiment.

受側カメラ300のメインCPU20は、配置が適切でないと判断した場合、各種の通知手段を制御し、テスト発光の受光の結果をユーザに通知する(S407)。   When determining that the arrangement is not appropriate, the main CPU 20 of the receiving camera 300 controls various notification means and notifies the user of the result of the test light emission (S407).

一方、受側カメラ300のメインCPU20は、各種の通知手段を制御し、配置が適切であると判断した場合、通信準備が完了した旨をユーザに通知する(S408)。この動作の後、通信動作のS2に進み、可視光信号の発受信が行われる。   On the other hand, the main CPU 20 of the receiving camera 300 controls various notification means and, when determining that the arrangement is appropriate, notifies the user that the communication preparation is completed (S408). After this operation, the process proceeds to S2 of the communication operation, where visible light signals are transmitted and received.

図14はS405における可視光信号の受光に適した設定動作の具体例を示す。測光・測距用CPU137は、CCD132に入射した通信用発光装置16からの可視光の明るさを測光し(A1)、測光した明るさに従って通信に適した露出値を決定する(A2)。この通信に適した露出値には、通信に適した絞り値(通信用絞り値)及び通信に適したシャッタスピード(通信用シャッタスピード)が含まれる。測光・測距用CPU137は、決定された通信用絞り値に従って絞り用モータ112を制御して絞り131を駆動し、絞り131の開口径を制御する。また、測光・測距用CPU137は、決定された通信用シャッタスピードに基づき、CG136を介してCCD132での電荷蓄積時間を制御する(A3)。   FIG. 14 shows a specific example of the setting operation suitable for receiving a visible light signal in S405. The photometry / ranging CPU 137 measures the brightness of visible light from the communication light emitting device 16 incident on the CCD 132 (A1), and determines an exposure value suitable for communication according to the measured brightness (A2). The exposure value suitable for communication includes an aperture value suitable for communication (communication aperture value) and a shutter speed suitable for communication (communication shutter speed). The photometry / ranging CPU 137 controls the aperture motor 112 according to the determined communication aperture value to drive the aperture 131 and control the aperture diameter of the aperture 131. The photometry / ranging CPU 137 controls the charge accumulation time in the CCD 132 via the CG 136 based on the determined communication shutter speed (A3).

例えば、測光・測距用CPU137が所定の第1の閾値以下の明るさを測光すると、これに応じて開放側の最大絞り値(それ以上大きい開口径へは動作しない限界値)を通信用絞り値に決定する。また、例えば、測光・測距用CPU137が所定の第2の閾値以上の明るさを測光すると、これに応じて小絞り側の最小絞り値(それ以上小さい開口径へは動作しない限界値)を通信用絞り値に決定する。こうすることで可視光信号受光量のオーバー・アンダーを防げる。   For example, when the photometry / ranging CPU 137 measures the brightness below a predetermined first threshold, the maximum aperture value on the open side (the limit value that does not work for larger aperture diameters) is set accordingly. Decide on a value. Further, for example, when the photometry / ranging CPU 137 measures the brightness above a predetermined second threshold value, the minimum aperture value on the small aperture side (the limit value that does not operate to a smaller aperture diameter) is set accordingly. Determine the communication aperture value. By doing this, it is possible to prevent over / under of the amount of received visible light signal.

あるいは、測光・測距用CPU137は、1画面中の所定の領域Z(図12参照)における画像データが飽和するよう、ズーム用モータ110を駆動させる(A4)。こうすると、可視光信号を所定の大きさで捉えることができ、可視光信号の受光精度が向上する。   Alternatively, the photometry / ranging CPU 137 drives the zoom motor 110 so that the image data in a predetermined area Z (see FIG. 12) in one screen is saturated (A4). In this way, the visible light signal can be captured with a predetermined size, and the light receiving accuracy of the visible light signal is improved.

このA4の動作も設定動作の具体例の一つであるが、A1〜A3の動作とは無関係に単独で行ってもよい。   The operation A4 is also a specific example of the setting operation, but may be performed independently regardless of the operations A1 to A3.

あるいは、S405の動作の内容は上記のA1〜4に限らず、通常の合焦動作(AF動作)であってもよい(A5)。こうすると、可視光信号の発信源に合焦した状態で可視光信号を受光でき、可視光信号の受光精度が向上する。   Or the content of the operation | movement of S405 is not restricted to said A1-4, A normal focusing operation | movement (AF operation | movement) may be sufficient (A5). In this way, the visible light signal can be received in a state in which the visible light signal transmission source is focused, and the light receiving accuracy of the visible light signal is improved.

このA5の動作も設定動作の具体例の一つであるが、A1〜A4の動作とは無関係に単独で行ってもよい。あるいは、A1〜A3、A4、又はA5の動作の一部を組み合わせた動作でもよい。   The operation A5 is also one specific example of the setting operation, but may be performed independently regardless of the operations A1 to A4. Or the operation | movement which combined a part of operation | movement of A1-A3, A4, or A5 may be sufficient.

なお、S401〜S407の動作は、S406で配置が適切であると判断されるまで繰り返される。この間、受側カメラ300は、可視光信号受光に適した設定を自動的に行う。このため、ユーザによる配置の微調整の手間が省け、可視光通信に適した配置を確実・迅速に確保できる。   Note that the operations of S401 to S407 are repeated until it is determined in S406 that the arrangement is appropriate. During this time, the receiving camera 300 automatically performs settings suitable for visible light signal reception. For this reason, it is possible to save the trouble of fine adjustment of the arrangement by the user, and to ensure an arrangement suitable for visible light communication reliably and quickly.

<第4実施形態>
第3実施形態では可視光信号受光に適した設定の一つとしてAE動作を挙げたが、周囲の状況によっては、絞りを開放しても可視光信号を十分な受光量で受光できない場合も考えられる。
<Fourth embodiment>
In the third embodiment, the AE operation is described as one of the settings suitable for receiving the visible light signal. However, depending on the surrounding conditions, there may be a case where the visible light signal cannot be received with a sufficient amount of received light even when the aperture is opened. It is done.

この場合、所定の領域Zにおける受光量でなく、一画面全体の受光量をIr,Ig,Ibとすることが好ましい。   In this case, it is preferable that the received light amount of the entire screen is Ir, Ig, Ib, not the received light amount in the predetermined region Z.

さらに、この場合、測光・測距CPU137は、合焦位置以外の位置に、フォーカスレンズ101bを移動させるようにフォーカス用モータ111に指令を出し、「ピンぼけ」状態で可視光信号を受光するとよい。   Further, in this case, the photometry / ranging CPU 137 may issue a command to the focus motor 111 to move the focus lens 101b to a position other than the in-focus position, and receive a visible light signal in the “out-of-focus” state.

<第5実施形態>
上述の通信動作ないし通信準備動作を発光制御CPU14、メインCPU20、あるいは測光・測距CPU137に実行させるプログラムも本発明に含まれる。このプログラムはパターンテーブル記憶部68、EEPROM146その他のコンピュータ読み取り可能な記憶媒体に記憶されている。
<Fifth Embodiment>
A program for causing the light emission control CPU 14, the main CPU 20, or the photometry / ranging CPU 137 to execute the above-described communication operation or communication preparation operation is also included in the present invention. This program is stored in the pattern table storage unit 68, the EEPROM 146, and other computer-readable storage media.

発側デジタルカメラのブロック構成図Block diagram of the originating digital camera CCD受光面のR,G,Bの微小なカラーフィルタの配置図Arrangement of R, G, B minute color filters on the CCD light receiving surface 通信用発光装置のブロック図Block diagram of light emitting device for communication 受側デジタルカメラのブロック構成図Block diagram of the receiving digital camera 通信システムの構成図Configuration diagram of communication system 通信動作の流れを示すフローチャートFlow chart showing the flow of communication operation パターンテーブルの概念説明図Conceptual illustration of pattern table R,G,Bの設定パルスの一例を示す図The figure which shows an example of the setting pulse of R, G, B 積算部の算出した受光量Ir,Ig,Ibの一例を示す図The figure which shows an example of received light quantity Ir, Ig, and Ib which the integrating | accumulating part calculated 第1実施形態に係る通信準備動作の流れを示すフローチャートThe flowchart which shows the flow of the communication preparation operation | movement which concerns on 1st Embodiment. 第2実施形態に係る通信準備動作の流れを示すフローチャートThe flowchart which shows the flow of the communication preparation operation | movement which concerns on 2nd Embodiment. 1画面内の所定の領域で可視光信号を捉えた状態を例示した図The figure which illustrated the state which caught the visible light signal in the predetermined field in 1 screen 第3実施形態に係る通信準備動作の流れを示すフローチャートThe flowchart which shows the flow of the communication preparation operation | movement which concerns on 3rd Embodiment. 可視光信号の受光に適した設定動作の流れを示すフローチャートFlow chart showing the flow of setting operation suitable for receiving visible light signals

符号の説明Explanation of symbols

14:発光制御CPU、17:LED群、19:LEDドライバ、16:通信用発光装置、20:メインCPU、63:赤外線受光回路、101:撮影レンズ、101a:ズームレンズ、101b:フォーカスレンズ、110:ズーム用モータ、111:フォーカス用モータ、112:絞り用モータ、131:絞り、132:CCD、134:A/D変換部、150:AF検出部、151:AE演算部 14: Light emission control CPU, 17: LED group, 19: LED driver, 16: Communication light emitting device, 20: Main CPU, 63: Infrared light receiving circuit, 101: Shooting lens, 101a: Zoom lens, 101b: Focus lens, 110 : Zoom motor, 111: focus motor, 112: aperture motor, 131: aperture, 132: CCD, 134: A / D converter, 150: AF detector, 151: AE calculator

Claims (25)

R,G,Bの可視光を発光するLEDからなるLED群、前記LED群の発光パターンを設定する発光制御部、前記発光制御部の設定した発光パターンに従って前記LED群の発光を制御するLEDドライバ、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する発光パターン記憶部を備え、前記発光制御部は所望の通信データを前記発光パターン記憶部のテーブルに従って前記LEDドライバに設定することで前記LED群からR,G,Bの可視光信号を発信する可視光信号発信装置と、
前記可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部を備える撮像装置と、
を有し、
前記撮像装置は前記可視光信号発信装置からの前記可視光信号の受光に際し、可視光通信の準備動作を行う可視光通信システム。
LED group composed of LEDs that emit visible light of R, G, and B, a light emission control unit that sets a light emission pattern of the LED group, and an LED driver that controls light emission of the LED group according to the light emission pattern set by the light emission control unit A light emission pattern storage unit that stores a table defining a light emission pattern of the LED group corresponding to desired communication data, and the light emission control unit sends the desired communication data to the LED driver according to the table of the light emission pattern storage unit. A visible light signal transmitting device for transmitting visible light signals of R, G, B from the LED group by setting;
A photographic lens that forms an image with the visible light signal transmission device as a subject, and R, G, and B visible light signals transmitted from the LED group of the visible light signal transmission device that is imaged by the photographic lens. , An image sensor that converts and outputs an image signal of B, an A / D converter that converts an image signal of R, G, B output from the image sensor into image data of R, G, B, and outputs the image data; A received light amount detection unit that detects the received light amount for each color of the R, G, and B visible light signals based on the R, G, and B image data output from the A / D conversion unit. A reception side light emission pattern storage unit that stores a table that defines a light emission pattern of the corresponding LED group, and according to the amount of received light for each color of the R, G, and B visible light signals detected by the light reception amount detection unit. Light emission pattern discrimination to determine the light emission pattern An imaging device comprising a data identification unit for identifying the communication data corresponding to the determined light emitting pattern of the light emission pattern determination unit in accordance with the table of the receiving-side emission pattern storage unit,
Have
A visible light communication system in which the imaging device performs a preparation operation for visible light communication when receiving the visible light signal from the visible light signal transmission device.
前記撮影レンズはフォーカスレンズを含み、
前記撮像装置は前記フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータ、前記フォーカス用モータの駆動を制御する合焦制御部をさらに備え、
前記合焦制御部は前記可視光信号発信装置からの前記可視光信号の受光に際し、前記フォーカス用モータの駆動を制御して前記フォーカスレンズを前記至近側の端点に移動させる請求項1に記載の可視光通信システム。
The photographing lens includes a focus lens,
The imaging apparatus further includes a focus motor that drives the focus lens to move the focal point between an end point on the infinity side and an end point on the close side, and a focus control unit that controls driving of the focus motor,
2. The focus control unit according to claim 1, wherein when the visible light signal is received from the visible light signal transmission device, the focus control unit controls the drive of the focus motor to move the focus lens to the closest end point. Visible light communication system.
前記撮影レンズはズームレンズを含み、
前記撮像装置は前記ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータ、前記ズーム用モータの駆動を制御するズーム制御部をさらに備え、
前記ズーム制御部は前記可視光信号発信装置からの前記可視光信号の受光に際し、前記ズーム用モータの駆動を制御して前記ズームレンズを広角方向へ移動させる請求項1に記載の可視光通信システム。
The photographing lens includes a zoom lens,
The imaging apparatus further includes a zoom motor that drives the zoom lens to move in a telephoto direction or a wide-angle direction, and a zoom control unit that controls driving of the zoom motor,
2. The visible light communication system according to claim 1, wherein the zoom control unit controls driving of the zoom motor to move the zoom lens in a wide-angle direction when receiving the visible light signal from the visible light signal transmission device. .
前記撮像装置は前記可視光信号発信装置にテスト発光の指示を送信する指示送信部をさらに備え、
前記可視光信号発信装置は前記テスト発光指示部から送信されたテスト発光の指示を受信する指示受信部をさらに備え、
前記発光制御部は前記指示受信部が前記テスト発光の指示を受信したことに応じて所定のテスト発光を行う請求項1に記載の可視光通信システム。
The imaging apparatus further includes an instruction transmission unit that transmits a test light emission instruction to the visible light signal transmission device,
The visible light signal transmission device further includes an instruction receiving unit that receives a test emission instruction transmitted from the test emission instruction unit,
The visible light communication system according to claim 1, wherein the light emission control unit performs predetermined test light emission in response to the instruction receiving unit receiving the test light emission instruction.
前記撮像装置は前記指示送信部によるテスト発光の指示送信後に前記A/D変換部から出力された画像データに基づいて前記撮像装置の配置が可視光通信に適しているか否かを判断する判断部をさらに備える請求項1に記載の可視光通信システム。   The image pickup apparatus determines whether or not the arrangement of the image pickup apparatus is suitable for visible light communication based on the image data output from the A / D conversion section after the test light emission instruction is transmitted by the instruction transmission section. The visible light communication system according to claim 1, further comprising: 前記判断部は前記画像データのシャープネスを表す特徴量に基づいて前記撮像装置の配置が可視光通信に適しているか否かを判断する請求項5に記載の可視光通信システム。   The visible light communication system according to claim 5, wherein the determination unit determines whether or not the arrangement of the imaging device is suitable for visible light communication based on a feature amount representing sharpness of the image data. 前記判断部は1画面内の所定の領域における画像データのレベルに基づいて前記撮像装置の配置が可視光通信に適しているか否かを判断する請求項5に記載の可視光通信システム。   The visible light communication system according to claim 5, wherein the determination unit determines whether the arrangement of the imaging device is suitable for visible light communication based on a level of image data in a predetermined area in one screen. 前記判断部による判断の結果を通知する通知部をさらに備える請求項5〜7のいずれかに記載の可視光通信システム。   The visible light communication system according to claim 5, further comprising a notification unit that notifies a result of determination by the determination unit. 前記撮影レンズはフォーカスレンズを含み、
前記撮像装置は前記A/D変換部から出力された画像データに基づいて合焦位置を検出するAF検出部、前記フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータ、前記AF検出部の検出した合焦位置に前記フォーカスレンズが移動するよう前記フォーカス用モータの駆動を制御する合焦制御部をさらに備え、
前記合焦制御部は前記指示送信部によるテスト発光の指示送信後に前記AF検出部の検出した合焦位置に前記フォーカスレンズが移動するよう前記フォーカス用モータの駆動を制御する請求項4〜8のいずれかに記載の可視光通信システム。
The photographing lens includes a focus lens,
The imaging apparatus detects an in-focus position based on image data output from the A / D converter, and drives the focus lens to focus the infinity end point and the close end point. A focusing motor that moves the focusing lens, and a focusing control unit that controls the driving of the focusing motor so that the focus lens moves to the in-focus position detected by the AF detection unit,
The focus control unit controls the drive of the focus motor so that the focus lens moves to the focus position detected by the AF detection unit after the test emission instruction is transmitted by the instruction transmission unit. The visible light communication system according to any one of the above.
前記撮影レンズはズームレンズを含み、
前記撮像装置は前記ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータ、前記ズーム用モータの駆動を制御するズーム制御部をさらに備え、
前記ズーム制御部は前記指示送信部によるテスト発光の指示送信後に、前記ズーム用モータの駆動を制御して1画面中の所定の領域における画像データのレベルが所定の閾値を超えるように前記ズームレンズを移動させる請求項4〜8のいずれかに記載の可視光通信システム。
The photographing lens includes a zoom lens,
The imaging apparatus further includes a zoom motor that drives the zoom lens to move in a telephoto direction or a wide-angle direction, and a zoom control unit that controls driving of the zoom motor,
The zoom control unit controls the drive of the zoom motor after the instruction transmission instruction is transmitted by the instruction transmission unit, so that the level of image data in a predetermined region in one screen exceeds a predetermined threshold value. The visible light communication system according to claim 4, wherein the visible light communication system is moved.
前記撮像装置は、前記撮像素子への露光量を調整する絞り、前記絞りを駆動して開口径を調整する絞り駆動部、前記画像データに基づいて前記可視光信号の明るさを測光する測光部、前記測光部の測光した可視光信号の明るさに基づいて適正な絞り値を決定し、前記適正な絞り値に基づいて前記絞り駆動部を駆動して前記絞りの開口径を制御する露光制御部をさらに備え、
前記露光制御部は前記指示送信部によるテスト発光の指示送信後に前記適正な絞り値の決定及び前記適正な絞り値に基づいて前記絞り駆動部を駆動し前記絞りの開口径を制御する請求項4〜8のいずれかに記載の可視光通信システム。
The imaging apparatus includes an aperture that adjusts an exposure amount to the image sensor, an aperture drive unit that adjusts an aperture diameter by driving the aperture, and a photometric unit that measures the brightness of the visible light signal based on the image data Exposure control for determining an appropriate aperture value based on the brightness of a visible light signal measured by the photometry unit and controlling the aperture diameter of the aperture by driving the aperture drive unit based on the appropriate aperture value Further comprising
The exposure controller controls the aperture diameter of the aperture by driving the aperture driver based on the determination of the appropriate aperture value and the appropriate aperture value after transmitting the test light emission command from the command transmitter. The visible light communication system in any one of -8.
前記撮像装置は可視光通信開始の入力操作を受け付ける通信開始操作部をさらに備え、かつ前記通信開始操作部が前記可視光通信開始の入力操作を受け付けた際に可視光通信の準備動作を行う請求項1〜11のいずれかに記載の可視光通信システム。   The imaging apparatus further includes a communication start operation unit that receives an input operation for starting visible light communication, and performs a preparation operation for visible light communication when the communication start operation unit receives an input operation for starting visible light communication. Item 12. The visible light communication system according to any one of Items 1 to 11. フォーカスレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータ、前記可視光信号発信装置からの前記可視光信号の受光に際し、前記フォーカス用モータの駆動を制御して前記フォーカスレンズを前記至近側の端点に移動させる合焦制御部を備える撮像装置。   An imaging lens that includes a focus lens and forms an image of a visible light signal transmitter that emits R, G, and B visible light signals from the LED group, and an LED group of the visible light signal transmitter that is imaged by the imaging lens An image sensor that receives R, G, and B visible light signals transmitted from the image sensor, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor , G, B image data A / D converter for output and R, G, B visible light signals based on R, G, B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and R detected by the received light amount detection unit , G, B visible light signals for each color A light emission pattern discriminating unit that discriminates a light emission pattern of the LED group according to the amount; a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to a table of the receiving light emission pattern storage unit; A focus motor that drives the lens to move the focal point between the end point on the infinity side and the end point on the near side, and when the visible light signal is received from the visible light signal transmission device, the focus motor is driven. An imaging apparatus including a focusing control unit that controls and moves the focus lens to the end point on the closest side. ズームレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータ、前記可視光信号発信装置からの前記可視光信号の受光に際し、前記ズーム用モータの駆動を制御して前記ズームレンズを広角方向へ移動させるズーム制御部を備える撮像装置。   An imaging lens that includes a zoom lens and forms an image of a visible light signal transmission device that transmits R, G, and B visible light signals from the LED group as a subject, and an LED group of the visible light signal transmission device that is imaged by the imaging lens An image sensor that receives R, G, and B visible light signals transmitted from the image sensor, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor , G, B image data A / D converter for output and R, G, B visible light signals based on R, G, B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and R detected by the received light amount detection unit Amount of received light for each color of visible light signal of G, B Accordingly, a light emission pattern discriminating unit that discriminates a light emission pattern of the LED group, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, the zoom lens The zoom lens that moves the zoom lens in the wide-angle direction by controlling the drive of the zoom motor when receiving the visible light signal from the visible-light signal transmission device. An imaging apparatus including a zoom control unit. LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記可視光信号発信装置からの前記可視光信号の受光に際し、前記A/D変換部から出力された画像データに基づいて前記撮像装置の配置が可視光通信に適しているか否かを判断する判断部を備える撮像装置。   An imaging lens that forms an image of a visible light signal transmission device that transmits R, G, and B visible light signals from the LED group as an object, and an R that is transmitted from the LED group of the visible light signal transmission device formed by the imaging lens. , G, B visible light signals are received, converted into R, G, B imaging signals and output, and R, G, B imaging signals output from the imaging elements are R, G, B An A / D converter that converts the image data to output, and receives the R, G, and B visible light signals for each color based on the R, G, and B image data output from the A / D converter. A received light amount detecting unit for detecting the amount of light, a receiving side light emitting pattern storage unit for storing a table defining a light emitting pattern of the LED group corresponding to desired communication data, and R, G, B detected by the received light amount detecting unit The LED group according to the amount of received light for each color of the visible light signal A light emission pattern discriminating unit for discriminating a light emission pattern, a data specifying unit for specifying communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, from the visible light signal transmitting device An imaging apparatus comprising: a determination unit that determines whether the arrangement of the imaging apparatus is suitable for visible light communication based on image data output from the A / D conversion unit when receiving the visible light signal. フォーカスレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記A/D変換部から出力された画像データに基づいて合焦位置を検出するAF検出部、前記フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータ、前記可視光信号発信装置からの前記可視光信号の受光に際し、前記AF検出部の検出した合焦位置に前記フォーカスレンズが移動するよう前記フォーカス用モータの駆動を制御する合焦制御部を備える撮像装置。   An imaging lens that includes a focus lens and forms an image of a visible light signal transmitter that emits R, G, and B visible light signals from the LED group, and an LED group of the visible light signal transmitter that is imaged by the imaging lens An image sensor that receives R, G, and B visible light signals transmitted from the image sensor, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor , G, B image data A / D converter for output and R, G, B visible light signals based on R, G, B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and R detected by the received light amount detection unit , G, B visible light signals for each color A light emission pattern discriminating unit that discriminates a light emission pattern of the LED group according to the amount; a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit; AF detection unit that detects a focus position based on image data output from the / D conversion unit, and for focusing to move the focus lens between the end point on the infinity side and the end point on the near side by driving the focus lens A focus control unit that controls driving of the focus motor so that the focus lens moves to a focus position detected by the AF detection unit when receiving the visible light signal from the motor and the visible light signal transmission device; An imaging apparatus provided. ズームレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータ、前記可視光信号発信装置からの前記可視光信号の受光に際し、前記ズーム用モータの駆動を制御して1画面中の所定の領域における画像データのレベルが所定の閾値を超えるように前記ズームレンズを移動させるズーム制御部を備える撮像装置。   An imaging lens that includes a zoom lens and forms an image of a visible light signal transmission device that transmits R, G, and B visible light signals from the LED group as a subject, and an LED group of the visible light signal transmission device that is imaged by the imaging lens An image sensor that receives R, G, and B visible light signals transmitted from the image sensor, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor , G, B image data A / D converter for output and R, G, B visible light signals based on R, G, B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and R detected by the received light amount detection unit Amount of received light for each color of visible light signal of G, B Accordingly, a light emission pattern discriminating unit that discriminates a light emission pattern of the LED group, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, the zoom lens In a predetermined area in one screen by controlling the driving of the zoom motor upon receiving the visible light signal from the visible light signal transmission device. An imaging apparatus comprising a zoom control unit that moves the zoom lens so that the level of image data exceeds a predetermined threshold. LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記撮像素子への露光量を調整する絞り、前記絞りを駆動して開口径を調整する絞り駆動部、前記画像データに基づいて前記可視光信号の明るさを測光する測光部、前記測光部の測光した可視光信号の明るさに基づいて適正な絞り値を決定し、前記適正な絞り値に基づいて前記絞り駆動部を駆動して前記絞りの開口径を制御する露光制御部を備え、前記露光制御部は前記可視光信号発信装置からの前記可視光信号の受光に際し、前記適正な絞り値の決定及び前記適正な絞り値に基づいて前記絞り駆動部を駆動し前記絞りの開口径を制御する撮像装置。   An imaging lens that forms an image of a visible light signal transmission device that transmits R, G, and B visible light signals from the LED group as an object, and an R that is transmitted from the LED group of the visible light signal transmission device formed by the imaging lens. , G, B visible light signals are received, converted into R, G, B imaging signals and output, and R, G, B imaging signals output from the imaging elements are R, G, B An A / D converter that converts the image data to output, and receives the R, G, and B visible light signals for each color based on the R, G, and B image data output from the A / D converter. A received light amount detecting unit for detecting the amount of light, a receiving side light emitting pattern storage unit for storing a table defining a light emitting pattern of the LED group corresponding to desired communication data, and R, G, B detected by the received light amount detecting unit The LED group according to the amount of received light for each color of the visible light signal A light emission pattern discriminating unit that discriminates a light emission pattern, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to a table of the receiving side light emission pattern storage unit, and an exposure amount to the image sensor A diaphragm to be adjusted, a diaphragm driving unit for adjusting the aperture diameter by driving the diaphragm, a photometric unit for measuring the brightness of the visible light signal based on the image data, and a brightness of the visible light signal measured by the photometric unit An exposure control unit that determines an appropriate aperture value based on the aperture value and drives the aperture drive unit based on the appropriate aperture value to control an aperture diameter of the aperture. The exposure control unit includes the visible light signal. An imaging device that controls the aperture diameter of the aperture by driving the aperture drive unit based on the determination of the appropriate aperture value and the appropriate aperture value when receiving the visible light signal from the transmitter . フォーカスレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータを備える撮像装置で用いられる可視光通信準備方法であって、
前記可視光信号発信装置からの前記可視光信号の受光に際し、前記フォーカス用モータの駆動を制御して前記フォーカスレンズを前記至近側の端点に移動させるステップを含む可視光通信準備方法。
An imaging lens that includes a focus lens and forms an image of a visible light signal transmitter that emits R, G, and B visible light signals from the LED group, and an LED group of the visible light signal transmitter that is imaged by the imaging lens An image sensor that receives R, G, and B visible light signals transmitted from the image sensor, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor , G, B image data A / D converter for output and R, G, B visible light signals based on R, G, B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and R detected by the received light amount detection unit , G, B visible light signals for each color A light emission pattern discriminating unit for discriminating a light emission pattern of the LED group according to the amount; a data specifying unit for specifying communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit; A visible light communication preparation method used in an imaging device including a focus motor that drives a lens to move a focal point between an end point on the infinity side and an end point on the close side,
A visible light communication preparation method including the step of controlling the driving of the focusing motor to move the focus lens to the end point on the closest side when receiving the visible light signal from the visible light signal transmission device.
ズームレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータを備える撮像装置で用いられる可視光通信準備方法であって、
前記可視光信号発信装置からの前記可視光信号の受光に際し、前記ズーム用モータの駆動を制御して前記ズームレンズを広角方向へ移動させるステップを含む可視光通信準備方法。
An imaging lens that includes a zoom lens and forms an image of a visible light signal transmission device that transmits R, G, and B visible light signals from the LED group as a subject, and an LED group of the visible light signal transmission device that is imaged by the imaging lens An image sensor that receives R, G, and B visible light signals transmitted from the image sensor, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor , G, B image data A / D converter for output and R, G, B visible light signals based on R, G, B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and R detected by the received light amount detection unit Amount of received light for each color of visible light signal of G, B Accordingly, a light emission pattern discriminating unit that discriminates a light emission pattern of the LED group, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, the zoom lens A visible light communication preparation method used in an imaging apparatus including a zoom motor that moves the lens in a telephoto direction or a wide-angle direction by driving
A visible light communication preparation method including a step of moving the zoom lens in a wide-angle direction by controlling driving of the zoom motor upon reception of the visible light signal from the visible light signal transmission device.
LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部を備える撮像装置で用いられる可視光通信準備方法であって、
前記可視光信号発信装置からの前記可視光信号の受光に際し、前記A/D変換部から出力された画像データに基づいて前記撮像装置の配置が可視光通信に適しているか否かを判断するステップを含む可視光通信準備方法。
An imaging lens that forms an image of a visible light signal transmission device that transmits R, G, and B visible light signals from the LED group as an object, and an R that is transmitted from the LED group of the visible light signal transmission device formed by the imaging lens. , G, B visible light signals are received, converted into R, G, B imaging signals and output, and R, G, B imaging signals output from the imaging elements are R, G, B An A / D converter that converts the image data to output, and receives the R, G, and B visible light signals for each color based on the R, G, and B image data output from the A / D converter. A received light amount detecting unit for detecting the amount of light, a receiving side light emitting pattern storage unit for storing a table defining a light emitting pattern of the LED group corresponding to desired communication data, and R, G, B detected by the received light amount detecting unit The LED group according to the amount of received light for each color of the visible light signal Visible light used in an imaging device comprising: a light emission pattern determination unit for determining a light emission pattern; and a data specifying unit for specifying communication data corresponding to the light emission pattern determined by the light emission pattern determination unit according to the table of the reception side light emission pattern storage unit A communication preparation method,
When receiving the visible light signal from the visible light signal transmission device, determining whether the arrangement of the imaging device is suitable for visible light communication based on the image data output from the A / D converter. A visible light communication preparation method including:
フォーカスレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記A/D変換部から出力された画像データに基づいて合焦位置を検出するAF検出部、前記フォーカスレンズを駆動して焦点を無限遠側の端点と至近側の端点との間で移動させるフォーカス用モータを備える撮像装置で用いられる可視光通信準備方法であって、
前記可視光信号発信装置からの前記可視光信号の受光に際し、前記AF検出部の検出した合焦位置に前記フォーカスレンズが移動するよう前記フォーカス用モータの駆動を制御するステップを含む可視光通信準備方法。
An imaging lens that includes a focus lens and forms an image of a visible light signal transmitter that emits R, G, and B visible light signals from the LED group, and an LED group of the visible light signal transmitter that is imaged by the imaging lens An image sensor that receives R, G, and B visible light signals transmitted from the image sensor, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor , G, B image data A / D converter for output and R, G, B visible light signals based on R, G, B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and R detected by the received light amount detection unit , G, B visible light signals for each color A light emission pattern discriminating unit that discriminates a light emission pattern of the LED group according to the amount; a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit; AF detection unit that detects a focus position based on image data output from the / D conversion unit, and for focusing to move the focus lens between the end point on the infinity side and the end point on the near side by driving the focus lens A visible light communication preparation method used in an imaging apparatus including a motor,
Visible light communication preparation including the step of controlling the driving of the focus motor so that the focus lens moves to the in-focus position detected by the AF detection unit when receiving the visible light signal from the visible light signal transmission device Method.
ズームレンズを含み、LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記ズームレンズを駆動して望遠方向又は広角方向に移動させるズーム用モータを備える撮像装置で用いられる可視光通信準備方法であって、
前記可視光信号発信装置からの前記可視光信号の受光に際し、前記ズーム用モータの駆動を制御して1画面中の所定の領域における画像データのレベルが所定の閾値を超えるように前記ズームレンズを移動させるステップを含む可視光通信準備方法。
An imaging lens that includes a zoom lens and forms an image of a visible light signal transmission device that transmits R, G, and B visible light signals from the LED group as a subject, and an LED group of the visible light signal transmission device that is imaged by the imaging lens An image sensor that receives R, G, and B visible light signals transmitted from the image sensor, converts them into R, G, and B image signals and outputs them, and R, G, and B image signals output from the image sensor , G, B image data A / D converter for output and R, G, B visible light signals based on R, G, B image data output from the A / D converter A received light amount detection unit for detecting the received light amount for each color, a receiving side light emission pattern storage unit for storing a table defining a light emission pattern of the LED group corresponding to desired communication data, and R detected by the received light amount detection unit Amount of received light for each color of visible light signal of G, B Accordingly, a light emission pattern discriminating unit that discriminates a light emission pattern of the LED group, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to the table of the receiving side light emission pattern storage unit, the zoom lens A visible light communication preparation method used in an imaging apparatus including a zoom motor that moves the lens in a telephoto direction or a wide-angle direction by driving
Upon receiving the visible light signal from the visible light signal transmission device, the zoom lens is controlled so that the drive of the zoom motor is controlled so that the level of image data in a predetermined area in one screen exceeds a predetermined threshold. A visible light communication preparation method including the step of moving.
LED群からR,G,Bの可視光信号を発信する可視光信号発信装置を被写体として結像する撮影レンズ、前記撮影レンズによって結像された可視光信号発信装置のLED群から発信されたR,G,Bの可視光信号を受光しR,G,Bの撮像信号に変換して出力する撮像素子、前記撮像素子から出力されるR,G,Bの撮像信号をR,G,Bの画像データに変換して出力するA/D変換部、前記A/D変換部から出力されたR,G,Bの画像データに基づいて前記R,G,Bの可視光信号の色ごとの受光量を検出する受光量検出部、所望の通信データに対応する前記LED群の発光パターンを規定したテーブルを記憶する受側発光パターン記憶部、前記受光量検出部の検出したR,G,Bの可視光信号の色ごとの受光量に従って前記LED群の発光パターンを判別する発光パターン判別部、前記受側発光パターン記憶部のテーブルに従って前記発光パターン判別部の判別した発光パターンに対応する通信データを特定するデータ特定部、前記撮像素子への露光量を調整する絞り、前記絞りを駆動して開口径を調整する絞り駆動部、前記画像データに基づいて前記可視光信号の明るさを測光する測光部、前記測光部の測光した可視光信号の明るさに基づいて適正な絞り値を決定し、前記適正な絞り値に基づいて前記絞り駆動部を駆動して前記絞りの開口径を制御する露光制御部を備える撮像装置で用いられる可視光通信準備方法であって、
前記可視光信号発信装置からの前記可視光信号の受光に際し、前記適正な絞り値の決定及び前記適正な絞り値に基づいて前記絞り駆動部を駆動し前記絞りの開口径を制御するステップを含む可視光通信準備方法。
An imaging lens that forms an image of a visible light signal transmission device that transmits R, G, and B visible light signals from the LED group as an object, and an R that is transmitted from the LED group of the visible light signal transmission device formed by the imaging lens. , G, B visible light signals are received, converted into R, G, B imaging signals and output, and R, G, B imaging signals output from the imaging elements are R, G, B An A / D converter that converts the image data to output, and receives the R, G, and B visible light signals for each color based on the R, G, and B image data output from the A / D converter. A received light amount detecting unit for detecting the amount of light, a receiving side light emitting pattern storage unit for storing a table defining a light emitting pattern of the LED group corresponding to desired communication data, and R, G, B detected by the received light amount detecting unit The LED group according to the amount of received light for each color of the visible light signal A light emission pattern discriminating unit that discriminates a light emission pattern, a data specifying unit that specifies communication data corresponding to the light emission pattern discriminated by the light emission pattern discriminating unit according to a table of the receiving side light emission pattern storage unit, and an exposure amount to the image sensor A diaphragm to be adjusted, a diaphragm driving unit for adjusting the aperture diameter by driving the diaphragm, a photometric unit for measuring the brightness of the visible light signal based on the image data, and a brightness of the visible light signal measured by the photometric unit An appropriate aperture value is determined based on the aperture value, and a visible light communication preparation method used in an imaging apparatus including an exposure control unit that drives the aperture drive unit based on the appropriate aperture value to control the aperture diameter of the aperture Because
When receiving the visible light signal from the visible light signal transmitter, determining the appropriate aperture value and driving the aperture drive unit based on the appropriate aperture value to control the aperture diameter of the aperture. Preparation method for visible light communication.
請求項19〜24のいずれかに記載の可視光通信準備方法をコンピュータに実行させるための可視光通信準備プログラム。   The visible light communication preparation program for making a computer perform the visible light communication preparation method in any one of Claims 19-24.
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