JP2015142696A5 - Endoscope device, video processor for endoscope, and method for operating endoscope device - Google Patents
Endoscope device, video processor for endoscope, and method for operating endoscope device Download PDFInfo
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Description
本発明は、内視鏡装置、特に、内視鏡挿入部の先端にＬＥＤによる照明手段を設けた内視鏡を有する内視鏡装置、当該内視鏡に接続される内視鏡用ビデオプロセッサおよび内視鏡装置の作動方法に関する。 The present invention relates to an endoscope apparatus, in particular, an endoscope apparatus having an endoscope provided with illumination means using LEDs at the distal end of an endoscope insertion portion, and an endoscope video processor connected to the endoscope. And an operation method of the endoscope apparatus .
本発明は、上述した事情に鑑みてなされたものであり、ＬＥＤを内視鏡の光源として使用する内視鏡装置において自動調光で観察を行った場合でも観察画像の色調が変化しない内視鏡装置、当該内視鏡に接続される内視鏡用ビデオプロセッサおよび内視鏡装置の作動方法を提供することを目的とする。 The present invention has been made in view of the above-described circumstances, and an endoscope in which the color tone of an observation image does not change even when observation is performed with automatic light control in an endoscope apparatus using an LED as a light source of an endoscope. An object is to provide a mirror device, an endoscope video processor connected to the endoscope, and a method of operating the endoscope device .
本発明における一態様の内視鏡装置は、ホワイトバランス調整モードにおいて取得したホワイトバランス補正係数に基づいて、撮影モードにおける色調を補正した映像信号を生成する内視鏡装置において、被写体に対して照明光を出射する発光素子と、前記発光素子からの発光量を可変させるように、当該発光素子に対して駆動電流値を可変させて供給する発光素子駆動部と、前記照明光によって照明された前記被写体を撮像して撮像信号を生成する撮像部と、前記発光素子が前記被写体を照明する際の前記駆動電流値を検出する駆動電流値検出部と、前記撮像部からの前記撮像信号に基づいて前記ホワイトバランス補正係数を演算するホワイトバランス補正係数演算部と、前記ホワイトバランス調整モードにおいて、前記発光素子からの発光量を順次可変させるように前記発光素子駆動部から前記発光素子に対して可変して供給される前記駆動電流値に応じて変位する、前記ホワイトバランス補正係数演算部において演算により取得した前記ホワイトバランス補正係数を、当該ホワイトバランス調整モードにおいて前記駆動電流値検出部により検出される前記駆動電流値に関連付けて記憶する記憶部と、前記撮影モードにおいて前記駆動電流値検出部により検出された前記駆動電流値に対応した前記ホワイトバランス補正係数を、前記記憶部において前記駆動電流値に関連付けて記憶された前記ホワイトバランス補正係数を読み出すホワイトバランス補正係数読出部と、前記撮影モードにおいて、前記ホワイトバランス補正係数読出部において読み出した前記ホワイトバランス補正係数に応じて、前記撮像部からの前記撮像信号の色調を補正して出力する色調補正回路と、を具備する。
本発明における一態様の内視鏡用ビデオプロセッサは、被写体に対して照明光を出射する発光素子からの発光量を可変させるように、当該発光素子に対して駆動電流値を可変させて供給する発光素子駆動部と、前記発光素子が前記被写体を照明する際の前記駆動電流値を検出する駆動電流値検出部と、前記照明光によって照明された前記被写体を撮像部により撮像することで得られる撮像信号に対して、設定されるホワイトバランス補正係数に基づいた色調補正処理を行う色調補正回路と、前記発光素子に印加する前記駆動電流値の大きさに対応付けた前記ホワイトバランス補正係数を記憶する記憶部と、前記駆動電流値検出部の検出結果に応じた前記ホワイトバランス補正係数を前記記憶部から読み出して前記色調補正回路に設定するホワイトバランス補正係数読出部と、を具備する。
本発明における一態様の内視鏡装置の作動方法は、ホワイトバランス調整モードにおいて取得したホワイトバランス補正係数に基づいて、撮影モードにおける色調を補正した映像信号を生成する内視鏡装置の作動方法であって、被写体に対して照明光を出射する発光素子からの発光量を可変させるように、発光素子駆動部において当該発光素子に対して駆動電流値を可変させて供給し、前記照明光によって照明された前記被写体を撮像部において撮像して撮像信号を生成し、前記発光素子が前記被写体を照明する際の前記駆動電流値を駆動電流値検出部において検出し、前記撮像部からの前記撮像信号に基づいた前記ホワイトバランス補正係数をホワイトバランス補正係数演算部において演算し、前記発光素子からの発光量を順次可変させるように前記発光素子駆動部から前記発光素子に対して可変して供給される前記駆動電流値に応じて変位する、前記ホワイトバランス補正係数演算部において演算により取得した前記ホワイトバランス補正係数を、前記駆動電流値検出部により検出される前記駆動電流値の大きさに関連付けて記憶部に記憶させる。
An endoscope apparatus according to an aspect of the present invention illuminates a subject in an endoscope apparatus that generates a video signal in which a color tone in a shooting mode is corrected based on a white balance correction coefficient acquired in a white balance adjustment mode. A light emitting element that emits light, a light emitting element driving unit that supplies the light emitting element with a variable driving current value so as to vary an amount of light emitted from the light emitting element, and the illumination light illuminated by the illumination light an imaging unit that generates an image pickup signal by imaging an object, and the light emitting element for detecting the drive current value at the time of illuminating the object driving current value detection unit, based on the imaging signal from the imaging unit In the white balance correction coefficient calculation unit for calculating the white balance correction coefficient and the white balance adjustment mode, the light emitting element emits light. The white balance acquired by calculation in the white balance correction coefficient calculation unit, which is displaced according to the drive current value variably supplied from the light emitting element drive unit to the light emitting element so as to sequentially vary the amount. A storage unit that stores a correction coefficient in association with the drive current value detected by the drive current value detection unit in the white balance adjustment mode, and the drive current detected by the drive current value detection unit in the shooting mode A white balance correction coefficient reading unit for reading out the white balance correction coefficient stored in the storage unit in association with the drive current value, and the white balance correction coefficient in the shooting mode. The white balance compensation read out by the readout unit. Depending on the coefficient, to anda color correction circuit configured to correct the color tone of the image signal from the imaging unit.
An endoscope video processor according to one aspect of the present invention supplies a variable drive current value to a light emitting element so as to vary a light emission amount from the light emitting element that emits illumination light to a subject. A light emitting element driving unit, a driving current value detecting unit that detects the driving current value when the light emitting element illuminates the subject, and an image pickup unit that captures the subject illuminated by the illumination light. A color tone correction circuit that performs color tone correction processing based on a white balance correction coefficient that is set for the imaging signal, and the white balance correction coefficient that is associated with the magnitude of the drive current value applied to the light emitting element is stored. And a white portion for reading out the white balance correction coefficient according to the detection result of the drive current value detection unit from the storage unit and setting the white balance correction coefficient in the color tone correction circuit. Comprising the Balance correction coefficient reading unit.
An operation method of an endoscope apparatus according to an aspect of the present invention is an operation method of an endoscope apparatus that generates a video signal in which a color tone in a shooting mode is corrected based on a white balance correction coefficient acquired in a white balance adjustment mode. The light emitting element driving unit supplies a variable driving current value to the light emitting element so as to vary the amount of light emitted from the light emitting element that emits illumination light to the subject, and is illuminated by the illumination light. The captured subject is imaged by an imaging unit to generate an imaging signal, the driving current value when the light emitting element illuminates the subject is detected by the driving current value detection unit, and the imaging signal from the imaging unit The white balance correction coefficient based on the white balance correction coefficient is calculated by a white balance correction coefficient calculation unit, and the light emission amount from the light emitting element is sequentially varied. The white balance correction coefficient obtained by calculation in the white balance correction coefficient calculation unit, which is displaced according to the drive current value variably supplied from the light emitting element drive unit to the light emitting element, is driven. The data is stored in the storage unit in association with the magnitude of the drive current value detected by the current value detection unit.
以上説明したように本発明によると、ＬＥＤを内視鏡の光源として使用する内視鏡装置において自動調光で観察を行った場合でも観察画像の色調が変化しない内視鏡装置、当該内視鏡に接続される内視鏡用ビデオプロセッサおよび内視鏡装置の作動方法を提供することができる。 As described above, according to the present invention, an endoscope apparatus in which the color tone of an observation image does not change even when observation is performed with automatic light control in an endoscope apparatus that uses an LED as a light source of an endoscope, An endoscopic video processor connected to a mirror and a method of operating an endoscopic device can be provided.
Claims (4)
被写体に対して照明光を出射する発光素子と、
前記発光素子からの発光量を可変させるように、当該発光素子に対して駆動電流値を可変させて供給する発光素子駆動部と、
前記照明光によって照明された前記被写体を撮像して撮像信号を生成する撮像部と、
前記発光素子が前記被写体を照明する際の前記駆動電流値を検出する駆動電流値検出部と、
前記撮像部からの前記撮像信号に基づいて前記ホワイトバランス補正係数を演算するホワイトバランス補正係数演算部と、
前記ホワイトバランス調整モードにおいて、前記発光素子からの発光量を順次可変させるように前記発光素子駆動部から前記発光素子に対して可変して供給される前記駆動電流値に応じて変位する、前記ホワイトバランス補正係数演算部において演算により取得した前記ホワイトバランス補正係数を、当該ホワイトバランス調整モードにおいて前記駆動電流値検出部により検出される前記駆動電流値に関連付けて記憶する記憶部と、
前記撮影モードにおいて前記駆動電流値検出部により検出された前記駆動電流値に対応した前記ホワイトバランス補正係数を、前記記憶部において前記駆動電流値に関連付けて記憶された前記ホワイトバランス補正係数を読み出すホワイトバランス補正係数読出部と、
前記撮影モードにおいて、前記ホワイトバランス補正係数読出部において読み出した前記ホワイトバランス補正係数に応じて、前記撮像部からの前記撮像信号の色調を補正して出力する色調補正回路と、
を具備することを特徴とする内視鏡装置。 In an endoscope apparatus that generates a video signal in which the color tone in the shooting mode is corrected based on the white balance correction coefficient acquired in the white balance adjustment mode,
A light emitting element for emitting illumination light to the subject ;
A light emitting element driving unit that supplies the light emitting element with a variable driving current value so as to vary the amount of light emitted from the light emitting element;
An imaging unit that images the subject illuminated by the illumination light and generates an imaging signal;
A driving current value detection section for detecting the drive current value when the light emitting element for illuminating the object,
A white balance correction coefficient calculation unit that calculates the white balance correction coefficient based on the imaging signal from the imaging unit;
In the white balance adjustment mode, the white is displaced according to the drive current value variably supplied from the light emitting element driving unit to the light emitting element so as to sequentially change the light emission amount from the light emitting element. A storage unit that stores the white balance correction coefficient acquired by calculation in the balance correction coefficient calculation unit in association with the drive current value detected by the drive current value detection unit in the white balance adjustment mode;
The white balance correction coefficient corresponding to the drive current value detected by the drive current value detection unit in the photographing mode is read out, and the white balance correction coefficient stored in the storage unit in association with the drive current value is read out. A balance correction coefficient reading unit;
A tone correction circuit that corrects and outputs the color tone of the imaging signal from the imaging unit in accordance with the white balance correction coefficient read by the white balance correction coefficient reading unit in the shooting mode;
An endoscope apparatus comprising:
前記記憶部は、前記内視鏡に設けられたことを特徴とする請求項１に記載の内視鏡装置。 The endoscope apparatus includes an endoscope having an insertion portion to be inserted into a subject, and a signal processing device to which the endoscope is detachably connected,
The endoscope apparatus according to claim 1, wherein the storage unit is provided in the endoscope.
前記発光素子が前記被写体を照明する際の前記駆動電流値を検出する駆動電流値検出部と、 A drive current value detector for detecting the drive current value when the light emitting element illuminates the subject;
前記照明光によって照明された前記被写体を撮像部により撮像することで得られる撮像信号に対して、設定されるホワイトバランス補正係数に基づいた色調補正処理を行う色調補正回路と、 A tone correction circuit that performs a tone correction process based on a set white balance correction coefficient with respect to an imaging signal obtained by imaging the subject illuminated by the illumination light by an imaging unit;
前記発光素子に印加する前記駆動電流値の大きさに対応付けた前記ホワイトバランス補正係数を記憶する記憶部と、 A storage unit that stores the white balance correction coefficient associated with the magnitude of the drive current value applied to the light emitting element;
前記駆動電流値検出部の検出結果に応じた前記ホワイトバランス補正係数を前記記憶部から読み出して前記色調補正回路に設定するホワイトバランス補正係数読出部と、 A white balance correction coefficient reading unit that reads the white balance correction coefficient according to the detection result of the drive current value detection unit from the storage unit and sets the white balance correction coefficient in the color tone correction circuit;
を具備することを特徴とする内視鏡用ビデオプロセッサ。 An endoscopic video processor, comprising:
被写体に対して照明光を出射する発光素子からの発光量を可変させるように、発光素子駆動部において当該発光素子に対して駆動電流値を可変させて供給し、 In the light emitting element driving unit, the driving current value is varied and supplied to the light emitting element so as to vary the amount of light emitted from the light emitting element that emits illumination light to the subject.
前記照明光によって照明された前記被写体を撮像部において撮像して撮像信号を生成し、 Imaging the subject illuminated by the illumination light in an imaging unit to generate an imaging signal,
前記発光素子が前記被写体を照明する際の前記駆動電流値を駆動電流値検出部において検出し、 The driving current value detecting unit detects the driving current value when the light emitting element illuminates the subject,
前記撮像部からの前記撮像信号に基づいた前記ホワイトバランス補正係数をホワイトバランス補正係数演算部において演算し、 The white balance correction coefficient calculation unit calculates the white balance correction coefficient based on the imaging signal from the imaging unit,
前記発光素子からの発光量を順次可変させるように前記発光素子駆動部から前記発光素子に対して可変して供給される前記駆動電流値に応じて変位する、前記ホワイトバランス補正係数演算部において演算により取得した前記ホワイトバランス補正係数を、前記駆動電流値検出部により検出される前記駆動電流値の大きさに関連付けて記憶部に記憶させる The white balance correction coefficient calculation unit that is displaced according to the drive current value variably supplied from the light emitting element driving unit to the light emitting element so as to sequentially change the light emission amount from the light emitting element. The white balance correction coefficient acquired by the step is stored in the storage unit in association with the magnitude of the drive current value detected by the drive current value detection unit.
ことを特徴とする内視鏡装置の作動方法。 An operating method of an endoscope apparatus characterized by the above.
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