JPH11122513A - Fluorescent light flicker correction device and camera using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fluorescent light flicker correction device by which a fluorescent light flicker component is eliminated in the case of a camera employing an image pickup tube or a MOS type image pickup element or the like. SOLUTION: The device consists of a vertical intensity distribution generating means 2 that integrates an output of a 2-dimension image pickup element in a horizontal direction to produce the intensity distribution of the intensity in the vertical direction, storage means 6, 7, 8 that stores the produced vertical intensity distribution by pluralities of past fields, a calculation means 10 that calculates a flicker component from pluralities of the stored vertical intensity distribution and a correction means 4 that corrects an output of the 2-dimension image pickup element based on the calculated flicker component, and the flicker component changed in the vertical direction is obtained and corrected based on the vertical intensity distribution of the input video signal to correct the fluorescent light flicker component changed in the vertical direction from an output of an image pickup tube or a MOS type image pickup element or the like having been impossible for correction in conventional devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp flicker correction device for suppressing fluorescent lamp flicker in a digital signal processing type video camera or the like.

[0002]

2. Description of the Related Art Conventionally, as this kind of flicker correction device, one described in Japanese Patent Application Laid-Open No. 1-253369 is known. FIG. 6 is a block diagram showing the configuration of such a conventional fluorescent lamp flicker correction device. First, the configuration of the above-described conventional flicker correction device will be described with reference to FIG. In FIG. 6, reference numeral 61 denotes a signal S6 having flicker.
10, a video signal input terminal for inputting a video signal S6;
An averaging circuit averaging 10 for one field period and outputting the result in synchronization with vertical retrace.

A low-pass filter (LPF) 63 has a characteristic of obtaining a signal obtained by removing a flicker component from a signal S611, which is an output signal of the averaging circuit 62. A reference numeral 64 delays the signal S611 by three fields and outputs the signal S61.
A delay circuit for adjusting the phase of the signal 3 to the signal S612;
Reference numeral 5 denotes a division circuit for dividing the signal S613 by the signal S612 to obtain a signal inversely proportional to the flicker component. Reference numeral 66 denotes an output signal S61 of the division circuit 65 for the input video signal S610.
This is a gain control circuit that removes flicker components by multiplying by 4.

Next, the operation of the above-mentioned conventional flicker correction device will be described with reference to FIG. The averaging circuit 62 inputs the flickered input signal S input to the video signal input terminal 61.
610 is averaged for one field period, and a signal S611 is output in synchronization with vertical retrace. Low-pass filter (LPF) 6
3 outputs a signal S612 obtained by removing the flicker component from the output signal S611 of the averaging circuit 62, and the delay circuit 64 delays the signal S611 by three fields, and outputs a signal S613 in which the phase of the output is adjusted to the signal S612. The dividing circuit 65 divides the signal S613 by the signal S612 to output a signal S614 inversely proportional to the flicker component, and the gain control circuit multiplies the input video signal S610 by the input video signal S610 to remove the flicker component. Output from the video signal output terminal 67.

[0005]

However, in the above-mentioned conventional flicker correction device, as in the case where an interline transfer CCD (hereinafter referred to as ITCD) is used as an image pickup device on the input side, a flicker component in the same field is one. It is effective to use the same field as in the case of a camera using an image pickup tube or a camera using a MOS type image sensor that reads out electric charges from pixels by specifying XY addresses. However, there is a problem that it cannot be used effectively when the flicker component in the image changes in a sine wave shape in the vertical direction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is excellent in that a flicker component of a fluorescent lamp can be removed even in a camera using an image pickup tube, a MOS type image pickup device or the like. An object of the present invention is to provide a fluorescent lamp flicker correction device.

[0007]

A fluorescent light flicker correction apparatus according to the present invention obtains a vertical intensity distribution of an input video signal, and obtains a vertical intensity distribution (intensity distribution of vertical intensity) of a plurality of fields (or frames, hereinafter the same). Find the flicker component that changes in the vertical direction in the current field from
Thus, the flicker component in the vertical direction of the current field is corrected.

According to the present invention, there is provided an image pickup tube and a MOS transistor in which a flicker component in an image of the same field changes vertically.
Even in cameras using a type image sensor, a fluorescent lamp flicker correction device that can correct a fluorescent lamp flicker component that changes in the vertical direction by obtaining a flicker component that changes in the vertical direction from the vertical intensity distribution has been developed. can get.

A camera equipped with a fluorescent lamp flicker correction apparatus according to the present invention processes the outputs of a plurality of two-dimensional image pickup devices having different exposure times or different spectral sensitivities, and individually analyzes the flicker components thereof. The video signal obtained by simultaneously correcting the vertical flicker component by the flicker correction device is corrected and then combined to obtain one image.

According to the present invention, a video signal obtained by simultaneously correcting a vertical flicker component from the outputs of a plurality of different two-dimensional image sensors is synthesized after the correction.
Even if a plurality of images having different flicker components are synthesized by a plurality of images having different exposure times or different spectral sensitivities, a camera capable of correcting a fluorescent lamp flicker component that changes in the vertical direction, which was impossible in the past, can be performed. Is obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fluorescent lamp flicker correction apparatus according to the first aspect of the present invention integrates the output of a two-dimensional image sensor in the horizontal direction to generate an intensity distribution of the intensity in the vertical direction. Distribution generating means, storing means for storing the generated vertical intensity distribution for a plurality of past fields, calculating means for calculating a flicker component from the stored plural vertical intensity distributions, and the two-dimensional calculation using the calculated flicker component. A correction means for correcting the output of the image pickup device, wherein a flicker component that changes in the vertical direction is obtained from the vertical intensity distribution of the input video signal, so that the image pickup tube which was conventionally impossible In addition, the fluorescent lamp flicker component that changes in the vertical direction from the output of the MOS type image sensor or the like can be corrected.

A fluorescent lamp flicker correction apparatus according to a second aspect of the present invention includes a plurality of signal processing apparatuses for processing outputs of a plurality of different two-dimensional imaging elements and outputting video signals respectively. A plurality of flicker correction devices for individually correcting flicker components of a plurality of video signals from the plurality of signal processing devices, and a synthesizing device for synthesizing a video signal corrected for the flicker components, to synthesize a plurality of images. A flicker correction device provided in the camera as the fluorescent light flicker correction device according to claim 1, wherein a plurality of images are combined after the flicker correction. And processing the outputs of a plurality of different two-dimensional imaging devices and individually analyzing the flicker components by the fluorescent lamp flicker correction device according to claim 1. By combining the corrected video signals after correction to obtain a single image, it is conventionally impossible to combine a plurality of images having different flicker components with a plurality of different images. The imaging tube,
This has the effect of correcting a fluorescent lamp flicker component that changes in the vertical direction from the output of a MOS type imaging device or the like.

According to a third aspect of the present invention, there is provided the fluorescent lamp flicker correction apparatus, wherein the outputs of the plurality of different two-dimensional image sensors are outputs of a plurality of two-dimensional image sensors having different exposure times. The fluorescent image according to claim 1, wherein the plurality of images are images having a plurality of different exposure times, and the outputs of the two-dimensional image pickup devices having a plurality of different exposure times are processed, and the flicker components are individually processed. By compensating the video signal obtained by the light flicker correction device and synthesizing to obtain a single image, it is possible to synthesize a plurality of images having different flicker components with a plurality of images having different exposure times. Even if there is such an effect, it is possible to correct a fluorescent lamp flicker component that changes in the vertical direction from the output of an image pickup tube, a MOS type image pickup device, or the like, which was impossible in the past.

According to a fourth aspect of the present invention, in the fluorescent lamp flicker correction apparatus, the outputs of the plurality of different two-dimensional imaging devices are outputs of a plurality of two-dimensional imaging devices having different spectral sensitivities, The fluorescence according to claim 1, wherein the plurality of images are images having a plurality of spectral sensitivities different from each other, processing outputs of a plurality of two-dimensional imaging elements having different spectral sensitivities, and individually outputting flicker components thereof. A single image is obtained by synthesizing a video signal obtained by the correction by the light flicker correction device after correction, so that a plurality of images having different flicker components are synthesized by a plurality of images having different spectral sensitivities. Even if there is such an effect, it is possible to correct a fluorescent lamp flicker component that changes in the vertical direction from the output of an image pickup tube, a MOS type image pickup device, or the like, which was impossible in the past.

According to a fifth aspect of the present invention, there is provided a camera, comprising: a plurality of signal processing devices for processing outputs of a plurality of two-dimensional imaging elements having different exposure times to output respective video signals; A camera comprising: a plurality of flicker correction devices for individually correcting flicker components of a plurality of video signals from a plurality of signal processing devices; and a synthesizing device for synthesizing a video signal with the flicker components corrected, wherein the flicker The correcting device is a fluorescent lamp flicker correcting device according to claim 1, wherein a plurality of images having different exposure times are combined after flicker correction to obtain one image, and a plurality of images having different exposure times are obtained. An image signal obtained by processing the output of the two-dimensional image pickup device and individually correcting the flicker component by the fluorescent lamp flicker correction device according to claim 1. By that to obtain a single image and, even when the flicker component synthesizing a plurality of different images by different images of a plurality of exposure times,
The fluorescent lamp flicker component which changes in the vertical direction from the output of an image pickup tube, a MOS type image pickup element, or the like, which has been impossible in the related art, can be corrected.

According to a sixth aspect of the present invention, there is provided a camera, comprising: a plurality of signal processing devices for processing outputs of a plurality of two-dimensional imaging elements having different spectral sensitivities and outputting respective video signals; A camera comprising: a plurality of flicker correction devices for individually correcting flicker components of a plurality of video signals from a plurality of signal processing devices; and a synthesizing device for synthesizing a video signal with the flicker components corrected, wherein the flicker The correcting device is a fluorescent light flicker correcting device according to claim 1, wherein a plurality of images having different spectral sensitivities are combined after flicker correction to obtain one image, and a plurality of images having different spectral sensitivities are obtained. An image signal obtained by processing the output of the two-dimensional image pickup device and individually correcting the flicker component by the fluorescent lamp flicker correction device according to claim 1. By that to obtain a single image and, even when combining the images flicker component differs by different images of a plurality of spectral sensitivity,
The fluorescent lamp flicker component which changes in the vertical direction from the output of an image pickup tube, a MOS type image pickup element, or the like, which has been impossible in the related art, can be corrected.

Hereinafter, based on the attached drawings and FIGS. 1 to 5,
An embodiment of the present invention will be described in detail. FIG. 1 is a block diagram showing a configuration of a fluorescent lamp flicker correction device according to a first embodiment of the present invention. FIG. 2 is a block diagram showing a first embodiment of the present invention shown in FIG.
FIG. 3 is a waveform diagram showing signal waveforms at various parts of the fluorescent lamp flicker correction apparatus according to the embodiment of the present invention. FIG. 3 shows the operation of the vertical intensity distribution generating means of the fluorescent lamp flicker correction apparatus according to the first embodiment of the present invention shown in FIG. FIG. 4 is a block diagram showing a configuration of a camera to which the fluorescent lamp flicker correction device according to the present invention is applied, and FIG. 5 is a block diagram showing a configuration of another camera to which the fluorescent lamp flicker correction device according to the present invention is applied. is there.

(First Embodiment) First, with reference to FIG. 1, the configuration of a fluorescent lamp flicker correction device according to a first embodiment of the present invention will be described. In FIG. 1, reference numeral 1 denotes a video signal input terminal for inputting a video signal S12, and reference numeral 2 denotes an operation for obtaining a sum of signal strengths in the horizontal direction of an image of one field to obtain a vertical strength distribution (vertical strength distribution). Vertical intensity distribution generating means 3, delay means for delaying the input video signal S12 in time for one horizontal scanning period, 5 switches for distributing and recording the vertical intensity distribution to three storage means, 6, 7, 8 is a storage means for storing the vertical intensity distribution (the storage method will be described later), 9 is an averaging means for obtaining a signal S21 obtained by averaging the values of the three storage means 6, 7, and 8; Output signal S2 of means 9
1 is a calculating means for dividing the output of the vertical intensity distribution generating means 2 on a vertical scanning line basis to determine a flicker component (may be a dividing means).
And 11 a video signal output terminal for outputting a video signal from which the flicker component has been removed.

Next, the operation of the fluorescent lamp flicker correction apparatus according to the first embodiment of the present invention will be described with reference to FIGS. In the description of the present embodiment, the video signal input from the video signal input terminal 1 is assumed to be a video signal showing a subject that is uniform over the entire screen for the sake of description. Video signal S
Numeral 12 indicates this, as shown in FIG.
Appears as a video signal having a waveform modulated by the fluorescent light flicker component. In the example of FIG. 2, the frequency of the power supply is set to 50 Hz, so that the cycle of modulating the video signal by illuminating the fluorescent lamp is 100 Hz, and the field cycle of the video signal is 60 Hz. It will appear repeatedly in a cycle. The vertical intensity distribution S14 is obtained by integrating the video signal S12 in the horizontal direction by the vertical intensity distribution generating means 2 to obtain an intensity distribution in the vertical direction (for each field, one line at a time).

Next, the operation of the vertical intensity distribution generating means 2 will be described with reference to FIG. Input video signal 3
02 (video signal S12 in FIG. 1) is a two-dimensional image corresponding to an image of one field, and is assumed to be sampled into n pixels in the horizontal direction and m pixels in the vertical direction. All the pixels are m × n pixels, and the signal level of each pixel is Yij. The vertical intensity distribution 303 (corresponding to the signal S14 in FIG. 2 and representing a signal for one field) which is the output of the vertical intensity distribution generating means 2 is obtained by integrating the signal level of each pixel in the horizontal direction. The relationship between the signal level Yij and the vertical intensity distribution Vi of each part to be obtained is expressed by the following general formula [Equation 1].
It is represented by

[0021]

(Equation 1)

Since the vertical intensity distribution S14 in FIG. 2 shows a case where the subject is photographed uniformly on the entire screen as described above, it has a waveform having only the modulation component due to the flicker of the fluorescent lamp. The vertical intensity distribution S14 is converted by the vertical intensity distribution generating means 2 into the input video signal S1 for one horizontal scanning period.
This is a waveform delayed from 2. The phase difference is adjusted by delaying the input video signal S12 by one horizontal scanning period by the delay means 3.

The switch 5 is provided for sequentially switching and recording the vertical intensity distribution S14 to three storage units 6, 7, 8 for each field. Each storage unit 6, 7, 8 stores one field recorded. Is output continuously for three fields. That is, the signals S18, S19, and S20 represent a state in which the signals recorded in the respective storage units 6, 7, and 8 are continuously output for three fields.

The averaging means 9 performs averaging of the signals 18, 19, and 20, and the resulting output has a vertical intensity distribution waveform which is not modulated by the fluorescent lamp flicker as shown in a signal S21. . Here, the absence of the fluorescent lamp flicker component in the signal S21 is due to the repetition of the flicker component having a cycle of three fields, and the sum of the flicker components of the three fields is constant.

The calculating means 10 generates a signal S21 which is a vertical intensity distribution of the signal level from which the flicker component has been removed.
Is divided by the vertical intensity distribution S14 of the signal level in which the flicker component remains. As a result of the division, the output signal S22 of the calculating means becomes a signal inversely proportional to the modulation component due to the fluorescent lamp flicker. The correction means 4 is a signal S22 and the video signal S whose phase is matched with the signal S22 by the delay means 3.
By multiplying by 13, the video signal S23 from which the flicker component has been removed can be obtained.

As described above, according to the embodiment of the present invention, even in a video camera using an image pickup tube, a MOS type image pickup device, etc., it is possible to correct the fluorescent light flicker and obtain a video signal free of the fluorescent light flicker. Can be.

(Second Embodiment) Next, with reference to FIG. 4, the structure of a fluorescent lamp flicker correction device according to a second embodiment of the present invention will be described. The fluorescent light flicker correction device according to the present embodiment is capable of correcting a plurality of types of images (for example,
In the present embodiment, a short-time exposure image and a long-time exposure image are taken as an example, but other exposure times such as medium-time exposure may be used to obtain an image with a wide dynamic range. In a camera (video camera), a plurality of fluorescent lamp flicker corrections are arranged in a plurality of types of image processing systems of the camera so as to correct the fluorescent lamp flicker during processing of a plurality of types of images. Device.

In FIG. 4, reference numeral 401 denotes a first CCD which performs short-time exposure and clearly captures an image of a high-luminance portion.
(Two-dimensional image sensor), 404 is a second CCD (two-dimensional image sensor) that performs long-time exposure and clearly captures an image of a part with low luminance, and 402 is a first CCD that is short-time exposed
A first signal processing device 405 for performing image processing on an output of 401 to generate a video signal;
A second flicker correction device for correcting the fluorescent lamp flicker of the video signal output from the first signal processing device 402; This is a second flicker correction device for correcting the fluorescent light flicker of the video signal output from the second signal processing device 405. Note that both the first and second flicker correction devices 403 and 406 in this embodiment are
Although the flicker correction device shown in the first embodiment of the present invention is used, another flicker correction device may be used. Reference numeral 407 denotes a synthesizing device for synthesizing one image from the short-time exposure image from the first flicker correction device 403 and the long-time exposure image from the second flicker correction device 406. A video signal output terminal for outputting a video signal after fluorescent lamp flicker correction in which an image and a long-time exposure image are combined.

Next, the operation of the fluorescent lamp flicker correction apparatus according to the second embodiment of the present invention configured as described above will be described with reference to FIG. The first CCD 401 performs short-time exposure and clearly captures an image of a high-luminance portion, and the second CCD 404 performs long-time exposure and clearly captures an image of a low-luminance portion. . First signal processing device 402 and second signal processing device 405
Is a first CCD 401 exposed to a short time and a long time.
And outputs an image signal by performing image processing on the output of the second CCD 404. In addition, the first and second flicker correction devices 403 and 406 include the first and second signal processing devices 403 and
The fluorescent signal flicker of the video signal output from the video signal 406 is corrected, and the synthesizing device 407 converts the short-time exposure image with the fluorescent light flicker correction and the long-time exposure image with the fluorescent light flicker correction into, for example, the entire short-time exposure image The entire long-exposure image is added at a certain ratio, or a part of the short-exposure image is combined with a part of the long-exposure image. A video signal output terminal 408 is a video signal output terminal that outputs a video signal of an image obtained by combining the short-time exposure image and the long-time exposure image after the fluorescent lamp flicker correction.

Next, the operation of the fluorescent lamp flicker correction apparatus in different exposure systems such as a short exposure image and a long exposure image will be described. The image exposure time and the exposure time are different between the short-time exposure and the long-time exposure. Have different phases and amplitudes. Therefore, the first and second
In the case of a configuration in which flicker correction is performed after synthesizing the outputs of the signal processing devices 402 and 405, the flicker component of both the short-time exposure image and the long-time exposure image cannot be corrected simultaneously. As described above, the short exposure image and the long exposure image are subjected to the fluorescent lamp flicker correction by the first and second flicker correction devices 403 and 406, respectively, before being synthesized by the synthesis device 407. The fluorescent lamp flicker of the time exposure image and the long exposure image can be corrected simultaneously.

As described above, according to the present embodiment, in a camera characterized in that a single image is obtained by combining images of a plurality of exposure systems having different exposure times, Is provided with an individual flicker correction device for each of the images of different exposure systems, and corrects them at the same time and then synthesizes them, thereby obtaining a video signal output from which the fluorescent lamp flicker component has been removed from the synthesized images. Can be.

In the above description, the fluorescent lamp flicker correction apparatus according to the present embodiment has been described as an example in which the short-time exposure image and the long-time exposure image are captured by separate CCDs. The same applies to the case where a time-exposure image and a long-time exposure image are captured in a time-division manner. In this case, one flicker correction device may be implemented to be used as a short-time exposure image flicker correction device or a long-time exposure flicker correction device by, for example, changing the timing in a time-division manner. it can.

(Third Embodiment) Next, with reference to FIG. 5, the structure of a fluorescent lamp flicker correction device according to a third embodiment of the present invention will be described. The fluorescent lamp flicker correction device according to the present embodiment is different from the spectral image (for example,
In the present embodiment, an image captured by spectrally dispersing R (red), G (green), and B (blue) is taken as an example, but a spectral image of another color component may be combined. A plurality of fluorescent light flicker correction devices arranged in a plurality of corresponding image processing systems so as to correct fluorescent light flicker during processing of a plurality of types of spectral images in the camera (video camera). Consists of

In FIG. 5, reference numeral 501 denotes an R filter that allows light of a red color component to pass, 502 denotes a G filter that allows light of a green color component to pass, and 503 denotes a B filter that allows light of a blue color component to pass. , Each R filter 501, G
Red, green, which passed through the filter 502 and the B filter 503,
Each of the blue color components is a third CCD (two-dimensional image sensor)
504, a fourth CCD (two-dimensional image sensor) 505 and a fifth CCD (two-dimensional image sensor) 506,
Outputs the image of each color component of red, green and blue. 507, 50
Reference numerals 8 and 509 denote third, fourth and fifth CCDs 504, 505 and 506 having red, green and blue color components, respectively.
Third, fourth, and fifth signal processing devices that respectively process the image outputs of the above and output video signals.

Reference numerals 510, 511 and 512 denote third, fourth and fifth signal processors 507 and 50, respectively.
Third, fourth, and fifth flicker correction devices for correcting the fluorescent light flicker of the video signal output from the image signals 8, 509. Third, fourth and fifth flicker correction devices 510,
In this embodiment, the flicker correction devices 511 and 512 use the flicker correction device described in the first embodiment of the present invention, but other flicker correction devices may be used. Also, 513
Is a synthesizing device for synthesizing one image from images having red, green, and blue color components from the third, fourth, and fifth flicker correction devices 510, 511, and 512, respectively.
Reference numeral 4 denotes a video signal output terminal for outputting a video signal after fluorescent lamp flicker correction in which images of the respective color components of red, green, and blue are combined.

Next, the operation of the fluorescent lamp flicker correction apparatus according to the third embodiment of the present invention configured as described above will be described with reference to FIG. The output of the CCD 504 for imaging the red component of the subject and the CCD 50 for imaging the green component
5 and a flicker component of the output of the CCD 506 that captures the blue component are different from each other. This is because the afterglow time, that is, the spectral sensitivity differs for each emission spectrum depending on the characteristics of the light emitting body of the fluorescent lamp. From the red, green, and blue images having different flicker components as described above, for example, the luminance Y of the composite image is calculated as Y = 0.3R + 0.6G + 0.
When synthesized as 1B, the obtained flicker component of luminance differs depending on the color of the subject.

Therefore, it is not possible to correct such flicker of luminance Y with a fluorescent lamp flicker correcting device including only one flicker correcting device.
For this reason, in the present embodiment, a fluorescent lamp flicker correction device constituted by individual flicker correction devices is used so that flicker correction can be performed independently for each of the red, green, and blue video signals. . in this way,
In the present embodiment, the correction of the fluorescent lamp flicker is performed in red, green,
Since it is performed at the stage of the blue video signal, it is possible to obtain a video signal having no flicker component in the synthesized luminance Y.

As described above, according to the fluorescent lamp flicker correction apparatus of the present embodiment, in a camera that combines a plurality of images having different spectral sensitivities to obtain one image, each of the plurality of images is By providing a flicker correction device that simultaneously corrects flicker components individually,
Even when a plurality of images having different flicker components are combined with a plurality of images having different spectral sensitivities, a video signal having no flicker component in the combined image can be obtained.

In the description of this embodiment, an example in which images having different spectral sensitivities are picked up by another CCD has been described. However, a color filter is attached to one CCD, and the red, green and blue colors are output from the CCD. The configuration for obtaining each signal can be similarly implemented.

[0040]

The present invention is configured as described above,
In particular, by determining the flicker component that changes in the vertical direction from the vertical intensity distribution of the input video signal, it is possible to correct the fluorescent lamp flicker component that changes in the vertical direction, which was previously impossible. A correction device can be provided.

Further, the present invention is configured as described above, and in particular, processes the outputs of a plurality of two-dimensional imaging devices having different exposure times or different spectral sensitivities, and individually outputs the flicker components thereof. Image signals obtained by simultaneous correction by the fluorescent light flicker correction device are combined after correction to obtain one image, so that multiple images with different flicker components due to multiple exposure times or images with different spectral sensitivities It is possible to provide a camera that can correct a fluorescent lamp flicker component that changes in the vertical direction, which was impossible in the related art, even when the images are combined.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a fluorescent light flicker correction device according to a first embodiment of the present invention.

FIG. 2 is a waveform chart showing signal waveforms of various parts of the fluorescent lamp flicker correction device according to the first embodiment of the present invention shown in FIG.

FIG. 3 is a diagram showing an operation of a vertical intensity distribution generating means of the fluorescent lamp flicker correction device according to the first embodiment of the present invention shown in FIG. 1;

FIG. 4 is a block diagram showing a configuration of a camera to which the fluorescent light flicker correction device according to the present invention is applied.

FIG. 5 is a block diagram showing a configuration of another camera to which the fluorescent light flicker correction device according to the present invention is applied.

FIG. 6 is a block diagram showing a configuration of a conventional fluorescent lamp flicker correction device.

[Description of Signs] 1 video signal input terminal 2 vertical intensity distribution generating means 3 delay means 4 correction means 5 switch 6, 7, 8 storage means 9 averaging means 10 calculating means 11 video signal output terminal 301 vertical intensity distribution generating means 401 First CCD 404 Second CCD 402 First signal processing device 405 Second signal processing device 403 First flicker correction device 406 Second flicker correction device 407 Synthesis device 408 Video signal output terminal 501 R filter 502 G Filter 503 B filter 504 Third CCD 505 Fourth CCD 506 Fifth CCD 507 Third signal processing device 508 Fourth signal processing device 509 Fifth signal processing device 510 Third flicker correction device 511 Fourth Flicker Correction Device 512 Fifth Flicker Correction Device 513 Forming device 514 the video signal output terminal

Claims (6)

[Claims] 1. A vertical intensity distribution generating means for integrating an output of a two-dimensional image sensor in a horizontal direction to generate an intensity distribution of a vertical intensity, and a storage means for storing the generated vertical intensity distribution for a plurality of past fields. A fluorescent lamp flicker correction, comprising: calculating means for calculating a flicker component from a plurality of stored vertical intensity distributions; and correcting means for correcting the output of the two-dimensional image sensor by the calculated flicker component. apparatus. 2. A plurality of signal processing devices for processing outputs of a plurality of different two-dimensional imaging devices and outputting video signals, respectively, and correcting a plurality of video signals from the plurality of signal processing devices individually for flicker components. A plurality of flicker correction devices, and a synthesizing device for synthesizing a video signal corrected for the flicker component, wherein the camera is configured to synthesize one image by synthesizing a plurality of images. 2. A fluorescent lamp flicker correction device according to claim 1, wherein the flicker correction device is the fluorescent light flicker correction device according to claim 1, wherein a plurality of images are simultaneously subjected to flicker correction and combined after flicker correction. 3. An output of the plurality of different two-dimensional imaging devices is an output of a plurality of two-dimensional imaging devices having different exposure times.
3. The apparatus according to claim 2, wherein the plurality of images are images having different exposure times. 4. The output of the plurality of different two-dimensional imaging devices is the output of a plurality of two-dimensional imaging devices having different spectral sensitivities,
The apparatus according to claim 2, wherein the plurality of images are a plurality of images having different spectral sensitivities. 5. A plurality of signal processing devices for processing outputs of a plurality of two-dimensional imaging devices having different exposure times to output respective video signals, and individually flickering a plurality of video signals from the plurality of signal processing devices. A camera comprising: a plurality of flicker correction devices for correcting components; and a synthesizing device for synthesizing a video signal in which the flicker components are corrected, wherein the flicker correction device is the fluorescent lamp flicker correction device according to claim 1. A camera wherein flicker correction is performed on a plurality of images having different exposure times at the same time, and the images are synthesized after the flicker correction to obtain a single image. 6. A plurality of signal processing devices for processing the outputs of a plurality of two-dimensional imaging elements having different spectral sensitivities and outputting respective video signals, and individually flickering the plurality of video signals from the plurality of signal processing devices. A camera comprising: a plurality of flicker correction devices for correcting components; and a synthesizing device for synthesizing a video signal in which the flicker components are corrected, wherein the flicker correction device is the fluorescent lamp flicker correction device according to claim 1. A camera characterized in that a plurality of images having different spectral sensitivities are simultaneously subjected to flicker correction and combined after flicker correction to obtain one image.