WO2016163248A1 - 撮像装置および方法、電子機器、並びに車載用電子機器 - Google Patents
撮像装置および方法、電子機器、並びに車載用電子機器 Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/091—Digital circuits
- G03B7/093—Digital circuits for control of exposure time
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/684—Vibration or motion blur correction performed by controlling the image sensor readout, e.g. by controlling the integration time
- H04N23/6845—Vibration or motion blur correction performed by controlling the image sensor readout, e.g. by controlling the integration time by combination of a plurality of images sequentially taken
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/745—Detection of flicker frequency or suppression of flicker wherein the flicker is caused by illumination, e.g. due to fluorescent tube illumination or pulsed LED illumination
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
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- H—ELECTRICITY
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- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
Definitions
- the present disclosure relates to an imaging device and method, an electronic device, and an in-vehicle electronic device, and in particular, an imaging device and method, an electronic device, and an in-vehicle electronic device that can suppress flicker generated by a light source in a wide frequency band.
- an imaging device and method an electronic device, and an in-vehicle electronic device that can suppress flicker generated by a light source in a wide frequency band.
- Patent Document 2 An imaging device that prevents data from being extinguished for a long time by acquiring data at a frame rate higher than the output and selecting a frame at random has been proposed (see Patent Document 2).
- the movement of the moving object may become unnatural, or low frequency flicker may cause high frequency flicker.
- the present disclosure has been made in view of such a situation, and can suppress flicker generated by a light source in a wide frequency band.
- An imaging apparatus condenses light from a subject and generates an image, and changes an imaging interval of an image generated by the imaging unit in a non-uniform manner during a period of one frame.
- An imaging control unit condenses light from a subject and generates an image, and changes an imaging interval of an image generated by the imaging unit in a non-uniform manner during a period of one frame.
- the imaging control unit can capture three or more images during one frame period.
- the imaging control unit can gradually change the imaging interval of the generated image during one frame period.
- the imaging control unit can gradually increase the imaging interval of the generated image during one frame period.
- the imaging control unit can gradually reduce the imaging interval of the generated image during one frame period.
- the imaging interval of the image can correspond to a blinking interval in a frequency band of 50 Hz to 600 Hz.
- the imaging interval of the image can correspond to a blinking interval in a frequency band of 50 Hz to 300 Hz.
- the imaging interval of the image can correspond to a blinking interval in a frequency band of 50 Hz to 120 Hz.
- the image capturing control unit can set the image capturing interval for each frame to the same pattern.
- It may further include an image composition unit for compositing the images generated by the imaging unit.
- the image synthesizing unit can synthesize the image generated by the imaging unit with a predetermined weight.
- the imaging control unit changes a frame rate according to light and dark, and the image synthesis unit synthesizes an image generated by the imaging unit with a weight according to the frame rate changed by the imaging control unit. be able to.
- the imaging control unit reduces the frame rate according to darkness, and the image synthesis unit synthesizes the image generated by the imaging unit with a weight according to the frame rate changed by the imaging control unit. be able to.
- the imaging apparatus collects light from the subject, generates an image, and changes the imaging interval of the generated image non-uniformly during one frame period.
- An electronic apparatus collects light from a subject and generates an image, and changes an imaging interval of an image generated by the imaging unit in a non-uniform manner during one frame period And an imaging control unit.
- An in-vehicle electronic device has a non-uniform imaging interval between an imaging unit that collects light from a subject and generates an image and an image generated by the imaging unit during a period of one frame. And an imaging control unit that changes to
- light from a subject is collected and an image is generated.
- the imaging interval of the generated image is changed unevenly during the period of one frame.
- imaging device may be an independent imaging device or an internal block constituting one imaging device.
- flicker in a wide frequency band can be suppressed.
- the unnaturalness of the movement of the moving object can be suppressed.
- FIG. It is a figure which shows the example in the case (use case 2) corresponding to a traffic signal and a sign. It is a figure which shows the example in the case of corresponding to a traffic signal (use case 3). It is a figure which shows the modification of use case 1.
- FIG. It is a block diagram which shows the structural example of the hardware of a computer.
- the shooting timing is, for example, once per frame (frm).
- the shooting timing is once per frame (frm), for example, as shown in FIG. Therefore, the time when it always disappears is shot.
- Patent Document 1 proposes a technique for picking up a frame that detects an LED by picking up an image at high speed.
- FIG. 1B an example of a technique for detecting this LED is shown.
- this technique it is also proposed to shift the timing at random as shown by ⁇ t when imaging at high speed.
- the image is picked up three times at random, and only the image picked up at the third timing is lit at 60 Hz and 600 Hz, so that image is selected and output. Is done.
- images are randomly picked up four times, and only the images picked up at the timing of the fourth time shine at 60 Hz and 600 Hz, so that image is selected. Is output.
- the movement of the moving object becomes unnatural, or the low frequency flicker becomes high frequency flicker.
- the LED detection technology shown in Fig. 1B is costly for LED light source detection processing, and requires high power consumption for high frame rate video shooting, which generates heat. It was.
- FIG. 2 shows an example of a technique for picking up images at high speed and performing random selection.
- a plurality of images (five images in the case of FIG. 3) are shot at non-uniform intervals during one frame period of a moving image, and blended with a plurality of images. It was made to process. Note that the number of images is three or more. Thereby, flicker is efficiently removed.
- the non-uniform imaging timing in one frame period shown in FIG. 3 is the same in a plurality of frames. Thereby, the high frequency of the low frequency flicker can be avoided.
- FIGS. 4 and 5 which are imaging timings according to the present technology, imaging timings at non-uniform intervals in which a plurality of images are continuously fired during one frame period, and the intervals are the same among the plurality of frames. It is shown.
- the imaging interval of each output frame is uniform. Therefore, for example, when an object that is moving in a uniform linear motion is photographed, the object does not move in a uniform linear motion on the video image, and is unnatural.
- the movement of the moving body is natural. That is, in the present technology, as shown in the continuous shooting timing shown in B of FIG. 4, the continuous shooting timing is fixed for each frame, and the obtained frames are blended at a substantially fixed blend ratio for each frame.
- the bundled burst timing pattern and the blend ratio of each captured image are not substantially changed between adjacent frames, and the movement of the object does not become unnatural.
- the blend ratio is smoothly changed with a time constant.
- the intervals between the frames of the high-speed captured images used to generate the output frame are all the same as one frame. Images cause long-period flicker. Only a low-frequency flicker occurs even when a plurality of images causing long-period flicker are blended. Therefore, in the present technology, high frequency of long-period flicker is suppressed. Note that when high-frequency flicker is originally generated, it is not a target of suppression.
- the LED flicker in a bright situation where LED flicker occurs, the LED flicker is already suppressed by high-speed imaging and image blending, and the frame rate of high-speed imaging is gradually getting darker. Is controlled to drop. When the frame rate is lowered, the blend ratio of each high-speed imaging result is controlled so that the change does not appear in the video. The ratio (weight) of the high-speed captured image is controlled to change with a time constant.
- the conventional exposure control is performed after the frame rate becomes the same as that of normal single-frame shooting instead of continuous shooting.
- control of the imaging timing, shutter, and blend ratio when the ambient brightness is changed while performing high-speed imaging of four images is shown.
- the image is bright as shown in the first to third steps from the top in FIG. 6, four high-speed images are taken, so blending is performed in order of the weights of Wa, Wb, Wc, and Wd from the left image. Is called.
- the frame is darkened so that the frame rate is controlled to be reduced, so that two images from the left become one image and three high-speed images.
- blending is performed in order from the left image with weights of Wa + Wb, Wc, and Wd.
- the surroundings become darker and the frame rate is controlled to be reduced, so that three images from the left become one image and two high-speed images.
- blending is performed in order from the left image with weights of Wa + Wb + Wc and Wd.
- the surroundings become darker and the frame rate is controlled to be reduced, so that 4 images from the left become 1 image and 1 image
- the imaging timing, shutter, and blend ratio are controlled when the ambient brightness is changed as described above, the normal frame is changed from the high-speed imaging for flicker countermeasures. Seamless transition control to rate can be performed.
- FIG. 7 is a block diagram illustrating a configuration example of an imaging apparatus to which the present technology is applied.
- the imaging device 11 is configured to include an imaging control unit 21, an imaging unit 22, a timing adjustment buffer 23, an image composition unit 24, and an image processing unit 25.
- the imaging control unit 21 controls the acquisition of image data in the imaging unit 22 at a cycle higher than the output frame rate (for example, 30 fps or 60 fps).
- n be a period that is half the blinking cycle of the LED light source that generates LED flicker.
- the imaging control unit 21 controls the imaging unit 22 and changes the imaging interval non-uniformly during the period of one output frame. Specifically, the imaging control unit 21 acquires a plurality of high-speed captured images while gradually increasing the imaging interval to an integer multiple of n during the period of one output frame. For example, as will be described later, in the case of the example of FIG. 9, during the period of one frame of output, continuous images are captured with imaging intervals of n, 2n, 2n, and 3n, which is 3: 2: 2: 1. When blended with weights, the flicker amplitude caused by LEDs with a period longer than 2n can be attenuated by half at any frequency. In addition to the monotonous increase, the imaging interval may be monotonically decreased, or increased from the decrease, decreased from the increase, etc., but the monotone increase or the monotonic decrease is more effective.
- the imaging control unit 21 equalizes the exposure time for each high-speed captured image for the same output frame, and the exposure time is set for normal moving image shooting (one frame shooting and one frame output).
- the imaging unit 22 is controlled so as to have the same length as in the case of.
- the imaging control unit 21 performs control to reduce the frame rate of high-speed captured image acquisition by the imaging unit 22, as described above with reference to FIG. Seamless transition to normal video shooting control.
- the imaging unit 22 includes various optical systems for condensing an appropriate image on the image sensor such as an aperture, a lens, and a shutter, and an image sensor that receives light passing through the optical system and converts it into an electrical signal.
- the image sensor is constituted by a CMOS (Complementary Metal Oxide Semiconductor) solid-state imaging device or the like, and there are no particular restrictions (for example, limitations on the light receiving method, the type of color filter, etc.) other than being controllable by the imaging control unit 21. Absent.
- CMOS Complementary Metal Oxide Semiconductor
- the imaging unit 22 is controlled by the imaging control unit 21, converts light from the subject into an electrical signal, and supplies the converted electrical signal image to the timing adjustment buffer 23.
- the timing adjustment buffer 23 accumulates a plurality of high-speed captured images of one output frame, and outputs them in parallel to the image composition unit 24 in accordance with the output frame rate.
- the image composition unit 24 blends (synthesizes) a plurality of high-speed captured images input in parallel at a predetermined ratio, and outputs the blended image to the image processing unit 25. Specifically, a coefficient that minimizes LED flicker is set in accordance with the imaging timing controlled by the imaging control unit 21. Further, the image composition unit 24 controls the weight of each high-speed captured image in accordance with the control for reducing the frame rate of the high-speed captured image when the exposure time becomes long. Further, the image composition unit 24 performs control to smoothly change the weight of each high-speed captured image with a time constant for image quality adjustment.
- the image processing unit 25 performs signal processing of the image from the image composition unit 24 and outputs it to the subsequent stage. Note that a plurality or a single image processing unit 25 may be inserted at any position after the imaging unit 22. However, when the image processing unit 25 is inserted after the timing adjustment buffer 23, it is necessary to parallelize the processing blocks corresponding to the number of high-speed captured images. If it is arranged after the combining unit 24, it is advantageous in terms of hardware cost.
- step S21 the imaging control unit 21 controls the imaging unit 22 to perform continuous imaging at non-uniform imaging intervals during one output frame period.
- the imaging unit 22 converts light from the subject into an electrical signal, and supplies the converted electrical signal image to the timing adjustment buffer 23.
- a plurality of high-speed captured images are input in parallel from the imaging unit 22 to the timing adjustment buffer 23.
- step S22 the imaging control unit 21 determines whether or not the exposure time is long. If it is determined in step S22 that the exposure time is not long, the process proceeds to step S23.
- step S23 the timing adjustment buffer 23 outputs a plurality of captured images input from the imaging unit 22 in parallel in accordance with the output frame rate.
- step S22 determines whether the exposure time is long. If it is determined in step S22 that the exposure time is long, the process proceeds to step S25. In step S25, the imaging control unit 21 decreases the frame rate.
- step S26 the timing adjustment buffer 23 outputs the plurality of captured images input from the imaging unit 22 in parallel with the frame rate dropped by the imaging control unit 21.
- step S27 the image composition unit 24 controls (adjusts) the weight according to the dropped frame rate, blends (synthesizes) a plurality of high-speed captured images input in parallel with the controlled weight, and blends them.
- the resulting image is output to the image processing unit 25.
- step S24 or S27 the process proceeds to step S28.
- step S ⁇ b> 28 the image processing unit 25 performs signal processing of the image from the image synthesis unit 24 and outputs it to the subsequent stage.
- the same effect can be obtained even if blending is performed by shifting the imaging timing for each specific area, such as for each pixel or line within the plane of the imaging unit.
- the timing is changed in this way, for the pixel corresponding to the frame that is determined not to be necessary for the above-described control of the frame rate based on the brightness, the same control as the pixel that does not correspond to the frame determined to be unnecessary is performed.
- the image composition unit 24 has a weight coefficient set for each image fired continuously, and it is also possible to seamlessly switch the coefficient set by further blending the blend result of each coefficient set with an arbitrary weight. .
- the normal movie shooting mode and the long-period flicker countermeasure mode by continuous shooting can be seamlessly changed according to the brightness. Only necessary scenes can be handled while realizing electric power and heat generation.
- FIG. 9 is a diagram for explaining the effect of the present technology.
- FIG. 9 an experimental example is shown in which a processing result of 25 fps when an image of 1000 fps is input from the imaging device 11 is created. This is the same as the example of outputting a 30 fps image from a 600 fps image.
- FIG. 9 when no countermeasure is taken, an image is picked up at the leading timing in one output frame, so that the lifetime of the LED light source is output.
- the horizontal axis represents the blinking frequency of the light source
- the vertical axis represents the attenuation rate (dB) indicating how the brightness of the signal is attenuated by this processing.
- the vertical axis is brightness and the horizontal axis is time, and as indicated by the solid line in the graph, the signal causing the LED flicker becomes brighter and becomes darker after a while.
- the circled part has an attenuation factor of about -6 dB, and -6 dB corresponds to 1/2 times. If this is made to correspond to the graph on the lower left, as shown by the dotted line, the brightness amplitude becomes about 1 ⁇ 2, so that it can be seen that the signal completely disappeared until now becomes half.
- flicker can be removed by performing a blend process by continuously firing a plurality of images at a non-uniform interval during one frame period of a moving image.
- flicker can be efficiently removed as compared with equality by setting the imaging timing of a plurality of images used for generating one output frame at nonuniform intervals.
- the blinking frequency of the light source is an integral multiple of the power supply frequency.
- the power supply frequency is 50 Hz in the east and 60 Hz in the west.
- the power supply frequency is either 50 Hz or 60 Hz from a global perspective.
- FIG. 10 there are three main types of LED light sources reflected on the in-vehicle camera, and are classified into traffic lights, signs, and in-vehicle LED lights.
- traffic lights 100Hz and 120Hz are the mainstreams in the survey, and there are a wide range of signs and in-vehicle LEDs, so it is difficult to limit them (the tendency is often a multiple of 60,90 between 500Hz and 100Hz).
- FIG. 11 is a diagram showing an example in the case of covering all types of LED light sources (use case 1). When covering all types of LED light sources, it is necessary to cover 600Hz to 50Hz including the margin.
- the shortest imaging interval n is 1/1200 sec and the imaging interval is changed to n, 2n, 2n, 3n.
- the effect is improved by blending.
- FIG. 12 is a diagram showing an example of a case (use case 2) corresponding to a traffic signal and a sign.
- a case use case 2
- FIG. 12 When dealing with traffic lights and signs, it is necessary to cover 300 Hz to 50 Hz.
- the shortest imaging interval n is set to 1/600 sec, and four images are shot continuously while changing the imaging interval to n, 2n, 2n, and the weight of each image is blended at 3: 2: 1. Can be given.
- FIG. 13 is a diagram illustrating an example of the case corresponding to a traffic light (use case 3). When dealing with traffic lights, it is necessary to make 120Hz to 50Hz cover.
- n 1/240 sec and the imaging interval is changed to n, 2n, three shots are fired and the weight of each image is blended 2: 1: 1. It is done.
- the imaging interval and the blend ratio may be other values.
- the imaging interval is not limited to monotonically increasing, and may be monotonously decreasing. Further, as shown in FIG. 14B, the imaging interval may be monotonously increased from a monotonous decrease. Furthermore, as shown in FIG. 14C, the imaging interval may be a combination of short bursts.
- CMOS solid-state imaging device As the image sensor of the imaging unit has been described.
- a solid-state imaging device such as a CCD (Charge Coupled Device) solid-state imaging device may be used.
- FIG. 15 is a block diagram showing an example of the hardware configuration of a computer that executes the above-described series of processing by a program.
- a CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- An input / output interface 205 is further connected to the bus 204.
- An input unit 206, an output unit 207, a storage unit 208, a communication unit 209, and a drive 210 are connected to the input / output interface 205.
- the input unit 206 includes a keyboard, a mouse, a microphone, and the like.
- the output unit 207 includes a display, a speaker, and the like.
- the storage unit 208 includes a hard disk, a nonvolatile memory, and the like.
- the communication unit 209 includes a network interface and the like.
- the drive 210 drives a removable medium 211 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
- the CPU 201 loads, for example, the program stored in the storage unit 208 to the RAM 203 via the input / output interface 205 and the bus 204 and executes the program. Is performed.
- the program executed by the computer (CPU 201) can be provided by being recorded in the removable medium 211 as a package medium or the like, for example.
- the program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
- the program can be installed in the storage unit 208 via the input / output interface 205 by attaching the removable medium 211 to the drive 210.
- the program can be received by the communication unit 209 via a wired or wireless transmission medium and installed in the storage unit 208.
- the program can be installed in the ROM 202 or the storage unit 208 in advance.
- the program executed by the computer may be a program that is processed in time series in the order described in this specification, or in parallel or at a necessary timing such as when a call is made. It may be a program for processing.
- the system means a set of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Accordingly, a plurality of devices housed in separate housings and connected via a network and a single device housing a plurality of modules in one housing are all systems. .
- each step described in the above flowchart can be executed by one device or can be shared by a plurality of devices.
- the plurality of processes included in the one step can be executed by being shared by a plurality of apparatuses in addition to being executed by one apparatus.
- this technique can also take the following structures.
- an imaging unit that collects light from a subject and generates an image;
- An imaging apparatus comprising: an imaging control unit that changes imaging intervals of images generated by the imaging unit in a non-uniform manner during a period of one frame.
- the imaging device according to (1) wherein the imaging control unit captures three or more images during a period of one frame.
- the imaging apparatus according to any one of (1) to (4), wherein the imaging control unit gradually decreases an imaging interval of a generated image during a period of one frame.
- the imaging apparatus according to any one of (1) to (5), wherein the imaging interval of the image corresponds to a blinking interval in a frequency band of 50 Hz to 600 Hz.
- the imaging apparatus according to any one of (1) to (6), wherein the imaging interval of the image corresponds to a blinking interval in a frequency band of 50 Hz to 300 Hz.
- the imaging apparatus according to any one of (1) to (7), wherein the imaging interval of the image corresponds to a blinking interval in a frequency band of 50 Hz to 120 Hz.
- the imaging apparatus according to any one of (1) to (8), wherein the imaging control unit sets an imaging interval of images for each frame to the same pattern.
- the imaging apparatus according to any one of (1) to (9), further including an image synthesis unit that synthesizes an image generated by the imaging unit.
- the imaging device according to (10), wherein the image synthesis unit synthesizes the image generated by the imaging unit with a predetermined weight.
- the imaging control unit changes the frame rate according to light and dark, The imaging apparatus according to (11), wherein the image synthesis unit synthesizes an image generated by the imaging unit with a weight according to a frame rate changed by the imaging control unit.
- the imaging control unit reduces the frame rate according to the darkness, The imaging apparatus according to (12), wherein the image synthesis unit synthesizes an image generated by the imaging unit with a weight according to a frame rate changed by the imaging control unit.
- the imaging device is Condensing light from the subject, creating an image, An imaging method in which imaging intervals of generated images are changed non-uniformly during a period of one frame.
- An electronic apparatus comprising: an imaging apparatus comprising: an imaging control unit that changes an imaging interval of images generated by the imaging unit in a non-uniform manner during a period of one frame.
- An imaging unit that collects light from the subject and generates an image
- An in-vehicle electronic apparatus comprising: an imaging device including an imaging control unit that changes an imaging interval of images generated by the imaging unit in a non-uniform manner during a period of one frame.
- imaging device 21 imaging control unit, 22 imaging unit, 23 timing adjustment buffer, 24 image compositing unit, 25 image processing unit
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Abstract
Description
0.概要
1.第1の実施の形態(撮像装置)
2.第2の実施の形態(ターゲット周波数)
3.第3の実施の形態(コンピュータ)
信号機などのLED電球を動画で撮影した場合に、例えば晴天の日などシャッタが短くなる状況下で、長時間電球が消えたままの状態が写る現象が起こる。LEDは、非常に高い周波数で明滅を繰り返しているが、上記のような現象は、LEDの発光(明滅)周波数と撮影周波数とが近いために発生してしまう。
次に、図4および図5を参照して、本技術のポイントについて詳しく説明する。図4および図5においては、本技術による撮像タイミングである、1フレーム期間中に複数画像が連射される不均一な間隔の撮像タイミングであって、その間隔が複数フレーム間で同じである撮像タイミングが示されている。
<撮像装置の構成例>
図7は、本技術を適用する撮像装置の構成例を示すブロック図である。
次に、図8のフローチャートを参照して、撮像装置11の撮影処理について説明する。
図9は、本技術の効果について説明する図である。
<ターゲット周波数>
基本的に光源の明滅周波数は、電源周波数の整数倍になる。日本の場合、電源周波数は、東が50Hz、西60Hzとなっている。また、世界的にみても電源周波数は、50Hz、60Hzのどちらかになっている。
<本技術を適用したコンピュータの説明>
上述した一連の処理は、ハードウエアにより実行することもできるし、ソフトウエアにより実行することもできる。一連の処理をソフトウエアにより実行する場合には、そのフトウエアを構成するプログラムが、コンピュータにインストールされる。ここで、コンピュータには、専用のハードウエアに組み込まれているコンピュータや、各種のプログラムをインストールすることで、各種の機能を実行することが可能な、例えば汎用のパーソナルコンピュータなどが含まれる。
(1) 被写体からの光を集光し、画像を生成する撮像部と、
1フレームの期間中において、前記撮像部により生成される画像の撮像間隔を不均一に変える撮像制御部と
を備える撮像装置。
(2) 前記撮像制御部は、1フレームの期間中において3枚以上の画像を撮像させる
前記(1)に記載の撮像装置。
(3) 前記撮像制御部は、1フレームの期間中において、生成される画像の撮像間隔を徐々に変える
前記(1)または(2)に記載の撮像装置。
(4) 前記撮像制御部は、1フレームの期間中において、生成される画像の撮像間隔を徐々に増加させる
前記(1)乃至(3)のいずれかに記載の撮像装置。
(5) 前記撮像制御部は、1フレームの期間中において、生成される画像の撮像間隔を徐々に減少させる
前記(1)乃至(4)のいずれかに記載の撮像装置。
(6) 前記画像の撮像間隔は、50Hz乃至600Hzの周波数帯の明滅間隔に対応する
前記(1)乃至(5)のいずれかに記載の撮像装置。
(7) 前記画像の撮像間隔は、50Hz乃至300Hzの周波数帯の明滅間隔に対応する
前記(1)乃至(6)のいずれかに記載の撮像装置。
(8) 前記画像の撮像間隔は、50Hz乃至120Hzの周波数帯の明滅間隔に対応する
前記(1)乃至(7)のいずれかに記載の撮像装置。
(9) 前記撮像制御部は、フレーム毎に画像の撮像間隔を同じパターンとする
前記(1)乃至(8)のいずれかに記載の撮像装置。
(10) 前記撮像部により生成された画像を合成する画像合成部を
さらに備える前記(1)乃至(9)のいずれかに記載の撮像装置。
(11) 前記画像合成部は、所定の重みで、前記撮像部により生成された画像を合成する
前記(10)に記載の撮像装置。
(12) 前記撮像制御部は、明暗に応じて、フレームレートを変更し、
前記画像合成部は、前記撮像制御部により変更されたフレームレートに応じた重みで、前記撮像部により生成された画像を合成する
前記(11)に記載の撮像装置。
(13) 前記撮像制御部は、暗さに応じて、フレームレートを落とし、
前記画像合成部は、前記撮像制御部により変更されたフレームレートに応じた重みで、前記撮像部により生成された画像を合成する
前記(12)に記載の撮像装置。
(14) 撮像装置が、
被写体からの光を集光し、画像を生成し、
1フレームの期間中において、生成される画像の撮像間隔を不均一に変える
撮像方法。
(15) 被写体からの光を集光し、画像を生成する撮像部と、
1フレームの期間中において、前記撮像部により生成される画像の撮像間隔を不均一に変える撮像制御部とを備える撮像装置
を有する電子機器。
(16) 被写体からの光を集光し、画像を生成する撮像部と、
1フレームの期間中において、前記撮像部により生成される画像の撮像間隔を不均一に変える撮像制御部とを備える撮像装置
を有する車載用電子機器。
Claims (16)
- 被写体からの光を集光し、画像を生成する撮像部と、
1フレームの期間中において、前記撮像部により生成される画像の撮像間隔を不均一に変える撮像制御部と
を備える撮像装置。 - 前記撮像制御部は、1フレームの期間中において3枚以上の画像を撮像させる
請求項1に記載の撮像装置。 - 前記撮像制御部は、1フレームの期間中において、生成される画像の撮像間隔を徐々に変える
請求項2に記載の撮像装置。 - 前記撮像制御部は、1フレームの期間中において、生成される画像の撮像間隔を徐々に増加させる
請求項3に記載の撮像装置。 - 前記撮像制御部は、1フレームの期間中において、生成される画像の撮像間隔を徐々に減少させる
請求項3に記載の撮像装置。 - 前記画像の撮像間隔は、50Hz乃至600Hzの周波数帯の明滅間隔に対応する
請求項3に記載の撮像装置。 - 前記画像の撮像間隔は、50Hz乃至300Hzの周波数帯の明滅間隔に対応する
請求項3に記載の撮像装置。 - 前記画像の撮像間隔は、50Hz乃至120Hzの周波数帯の明滅間隔に対応する
請求項3に記載の撮像装置。 - 前記撮像制御部は、フレーム毎に画像の撮像間隔を同じパターンとする
請求項2に記載の撮像装置。 - 前記撮像部により生成された画像を合成する画像合成部を
さらに備える請求項2に記載の撮像装置。 - 前記画像合成部は、所定の重みで、前記撮像部により生成された画像を合成する
請求項10に記載の撮像装置。 - 前記撮像制御部は、明暗に応じて、フレームレートを変更し、
前記画像合成部は、前記撮像制御部により変更されたフレームレートに応じた重みで、前記撮像部により生成された画像を合成する
請求項11に記載の撮像装置。 - 前記撮像制御部は、暗さに応じて、フレームレートを落とし、
前記画像合成部は、前記撮像制御部により変更されたフレームレートに応じた重みで、前記撮像部により生成された画像を合成する
請求項12に記載の撮像装置。 - 撮像装置が、
被写体からの光を集光し、画像を生成し、
1フレームの期間中において、生成される画像の撮像間隔を不均一に変える
撮像方法。 - 被写体からの光を集光し、画像を生成する撮像部と、
1フレームの期間中において、前記撮像部により生成される画像の撮像間隔を不均一に変える撮像制御部とを備える撮像装置
を有する電子機器。 - 被写体からの光を集光し、画像を生成する撮像部と、
1フレームの期間中において、前記撮像部により生成される画像の撮像間隔を不均一に変える撮像制御部とを備える撮像装置
を有する車載用電子機器。
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