JP2000032352A - Video camera device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to obtain an excellent picture while suppressing a flicker caused by an influence of a fluorescent lamp with a simple structure as much as possible by detecting a flicker frequency from a luminance signal integrated value of each field and controlling a frequency of a reference clock in accordance with the detected frequency. SOLUTION: A flicker reduction control part 11 is composed of a luminance signal integration circuit 12 for integrating luminance signals from a video signal processing circuit 6, a flicker detection circuit 13 for comparing integration signals from the luminance signal integration circuit 12 and detecting a peak position, a level difference or the like, and an oscillator control circuit 14 for generating a signal that controls a voltage control oscillator. This flicker reduction control part 11 integrates the luminance signals from the video signal processing circuit 6 for 1 field period, compares the integrated values between fields are detects a flicker from the peak position and the level. Then, the voltage control oscillator is voltage-controlled so that the frequency of a reference clock is controlled in conformity with a cycle of the peak and the level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image input apparatus using a solid-state image sensor, and more particularly to a video camera apparatus which suppresses flicker due to the influence of a lighting device and provides a good image.

[0002]

2. Description of the Related Art In recent years, many video cameras use a CCD to image a subject. Generally, when a CCD is driven by an interlace method, an image of 60 fields is captured per second, and when driven by a frame readout method, an image of 30 frames is captured per second.

The frequency of domestic commercial power is 60H
There are an area of z and an area of 50 Hz. Here, when a fluorescent lamp is turned on, if a special method such as an inverter method is not used, in a 60 Hz area, 120 times per second is used.
In the region of Hz, the blinking is repeated 100 times per second.

When the video camera is used under such a fluorescent lamp, the relationship between the CCD image readout timing and the flashing cycle of the fluorescent lamp is a common multiple in a region of 60 Hz. The image when the fluorescent lamp has the same brightness is captured by the CCD, and the state of the image is stable.

However, in the region of 50 Hz, the relationship between the CCD image reading timing and the flickering cycle of the fluorescent lamp is as follows.
Since the relationship is not a common multiple, flickering occurs in which the brightness of the fluorescent lamp changes and the image flashes each time the CCD captures an image.

Conventionally, a method for suppressing this flicker has been proposed. In the method described in Japanese Patent Laid-Open No. 6-209427, a video signal is input to a band-pass filter, and a flicker component contained in the video signal is reduced. Withdrawal,
The flicker component is input to a peak position detection circuit, the peak position of the flicker component is detected, the peak position information is converted into a digital signal by an A / D converter, and the digital peak position information is input to a phase control circuit, and the period of the peak position is calculated. There has been proposed a method of judging whether or not there is a possibility and detecting a flicker frequency.

[0007] From the detected flicker frequency and camera field frequency, phase control information corresponding to the shutter speed at that time is output, and the phase is controlled by a phase circuit to prevent flicker.

[0008] In Japanese Patent Application Laid-Open No. 7-264465, an error signal between the flickering phase of the illumination light and the phase of the vertical synchronizing signal is generated by a flicker detection sensor that detects the flickering change of the illumination light of the subject. Accordingly, a method is proposed in which a voltage-controlled oscillator that generates a reference clock for driving a solid-state imaging device is PLL-controlled, and a flicker synchronization circuit that forms the reference clock in synchronization with flickering of illumination light prevents flicker. Have been.

In recent video cameras, an electronic shutter that changes the exposure time of the CCD in response to a change in the amount of light of the subject, and an automatic shutter that optimally corrects the white level in response to a change in the color temperature of the subject or external light. Functions such as white balance, auto-focus for automatically adjusting the focus with respect to changes in the distance to the subject, and camera shake correction for correcting image blur due to camera shake are realized and are generally commercially available.

[0010]

However, according to the method disclosed in Japanese Patent Application Laid-Open No. 6-209427, two types of CCD driving pulses, a phase-shifting charge sweeping pulse and a phase-shifting charge readout pulse, are highly accurate. Therefore, there is a problem that the phase must be controlled and the circuit becomes complicated.

Further, according to Japanese Patent Application Laid-Open No. 7-264465, a sensor for detecting flicker in a component of a video camera system, and a signal processing unit for processing the output of the sensor are provided with a camera circuit. In addition to this, the circuit scale becomes large, and the flicker sensor needs to receive illumination light.Therefore, a window or something like a sensor mount must be installed in the camera case. There is a problem that the structure of the case becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a video camera apparatus that provides a favorable image while suppressing flicker due to the influence of a fluorescent lamp with a simple configuration as much as possible. It is.

[0013]

SUMMARY OF THE INVENTION A video camera apparatus according to the present invention solves the above-mentioned problems. According to the first aspect of the present invention, a flicker frequency is detected from a luminance signal integrated value for each field. Accordingly, the frequency of the reference clock is controlled to prevent the image from being deteriorated due to the cycle of the fluorescent lamp. To this end, a solid-state imaging device having an electronic shutter function and a vertical synchronization signal formed by dividing the reference clock are used. Driving means for driving the solid-state imaging device on the basis of,
Integrating means for integrating the luminance signal for each field, cycle detecting means for detecting the lighting cycle of the lighting means from the integrated value, and clock frequency controlling means for controlling the frequency of the reference clock according to the cycle detection result. It is provided.

Further, according to the present invention, the S / S
The present invention according to claim 3, which can maintain high N to reduce luminance flicker and prevent image degradation, and can increase the upper limit illuminance of an image, reduce luminance flicker, and prevent image degradation. Therefore, a solid-state imaging device having an electronic shutter function, driving means for driving the solid-state imaging device based on a vertical synchronization signal formed by dividing a reference clock, and a luminance signal for each field are integrated. Integrating means for comparing the integrated value of the luminance signal for each field, and, based on the result of the comparison, setting the target value of the integrated value of the luminance signal to the maximum or minimum value and setting the frequency of the reference clock for each field. And control means for performing the control.

According to a fourth aspect of the present invention, there is provided a solid-state imaging device having an electronic shutter function, which maintains good color reproducibility, reduces luminance flicker, and prevents image deterioration. The driving means for driving the solid-state imaging device based on a vertical synchronization signal formed by dividing the reference clock, the color signal detecting means for detecting a color signal for each field, and the color reproducibility for each field are compared. It comprises a color signal comparing means and a control means for setting the color signal of the best field to a target value and controlling the frequency of the reference clock for each field.

Further, according to the present invention, the color flicker frequency is detected from the color temperature detection signal for each field, and the frequency of the reference clock is controlled in accordance therewith, so that the deterioration of the color signal due to the fluorescent lamp cycle is reduced. A solid-state imaging device having an electronic shutter function, driving means for driving the solid-state imaging device based on a vertical synchronization signal formed by dividing a reference clock, and a color temperature of an image for each field. Color temperature detection means for detecting, flicker detection means for detecting color flicker due to the influence of the lighting cycle of the illumination means from the color temperature detection signal, and clock frequency control means for controlling the frequency of the reference clock according to the detection result. It is provided.

Further, the invention according to claim 6 is intended to reduce flicker of luminance simultaneously with flicker of color signals, and is formed by dividing a solid-state image pickup device having an electronic shutter function and a reference clock. Driving means for driving the solid-state imaging device based on the vertical synchronization signal, color temperature detecting means for detecting the color temperature of the image for each field, and color flicker due to the lighting cycle of the lighting means from the color temperature detection signal. Flicker detection means for detecting, clock frequency control means for controlling the frequency of the reference clock according to the detection result, and gain control of the luminance signal for each field are divided into three systems of control repeated for every three fields. AGC control means for performing the AGC.

According to a seventh aspect of the present invention, when a flicker due to the influence of a fluorescent light is generated in an image, an image is taken at a predetermined point in a lighting cycle of lighting for each field. It controls the clock frequency to suppress image flicker and prevent image degradation.It is based on a solid-state image sensor with an electronic shutter function and a vertical synchronization signal formed by dividing the reference clock. Driving means for driving the image sensor, integrating means for integrating the luminance signal for each field, cycle detecting means for detecting the lighting cycle of the lighting means, and for each field, a predetermined one of the lighting cycles of the lighting. It is provided with clock control means for controlling a clock frequency so that an image is taken at a point.

The invention according to claim 8 is characterized in that when color flicker occurs due to the influence of a fluorescent light on an image,
For each field, it controls the clock frequency so as to capture an image at a predetermined point in the lighting cycle of the lighting, suppresses color flicker of the image, and prevents image deterioration, and has an electronic shutter function. A solid-state imaging device;
Driving means for driving the solid-state imaging device based on a vertical synchronizing signal formed by dividing a reference clock, color temperature detecting means for detecting a color temperature of an image for each field, and lighting means from the color temperature detection signal Flicker detecting means for detecting color flicker due to the influence of the lighting cycle of light, cycle detecting means for detecting the lighting cycle of the lighting means, clock frequency control means for controlling the frequency of the reference clock, and lighting for each field. It is provided with clock control means for controlling a clock frequency so that an image is taken at a predetermined point in a lighting cycle.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a video camera apparatus according to the present invention will be described below with reference to FIGS.

<First Embodiment> FIG. 1 is a schematic structural view showing an embodiment of a video camera apparatus according to the present invention. In FIG. 1, a television camera includes a lens 1 for picking up an image of a subject and a lens. An image sensor circuit unit 2 for capturing the image captured in step 1, a CDS / AGC circuit 3 for sampling the image signal and controlling the gain, an image sensor drive circuit 4 for operating the image sensor, and a timing for driving the image sensor , A synchronization signal of a video signal, a control signal for video signal processing, a timing / synchronization signal generation circuit 5 for generating a signal for a video camera device control circuit (CPU) 7, and an input from the CDS / AGC circuit 3. Video signal processing circuit 6 that performs various processes on the signal to generate a video signal
A video camera device control circuit (CPU) 7 for controlling the video signal processing circuit 6; a power supply circuit 8 for controlling various power supplies for operating the video camera device; and outputting video signals to a television monitor via a cable. And an input / output I / F 9 for receiving power supply input, a reference clock generation circuit 10 composed of a voltage controlled oscillator, and a flicker reduction control unit 11.

Here, the flicker reduction control unit 11 compares the integrated signals from the luminance signal integrating circuit 12 and the luminance signal from the luminance signal integrating circuit 12 for integrating the luminance signals from the video signal processing circuit 6, and determines the peak position and the level difference. And the like, and an oscillator control circuit 14 for generating a signal for controlling the voltage controlled oscillator.

The flicker reduction control section 11 integrates the luminance signal from the video signal processing circuit 6 for one field period, compares the integrated value between fields, and detects flicker from the peak position and level. The voltage of the voltage controlled oscillator is controlled so as to control the frequency of the reference clock in accordance with the peak cycle and level.

At this time, the video camera apparatus controls the frequency of the reference clock in a range that can be synchronized with the monitor in order to generate the synchronization signal by dividing the reference clock.

The video camera device control circuit (CPU)
Reference numeral 7 has a function of transmitting a video control signal such as a video gain control or a white balance control to the video signal processing circuit 6, and automatically changing an EE shutter speed or fixing the EE shutter speed at a specific speed. And a function of transmitting a control signal for arbitrarily switching the control signal to the image sensor driving circuit 4.

When the video signal processing circuit 6 receives the control signal from the video camera device control circuit (CPU) 7 and the synchronization signal from the timing / synchronization signal generation circuit 5, it controls the gain of the video and , Color difference signal generation,
It has video signal processing functions such as matrix processing and white balance control.

The image pickup device driving circuit 4 automatically changes the shutter speed of the electronic shutter in response to generation of horizontal and vertical transfer signals for driving the CCD and a control signal from a video camera device control circuit (CPU) 7. Let me
It has a function of switching between fixing at a specific speed and the like.

FIG. 2 shows the relationship between the image pickup timing of a video camera and the output image of a subject illuminated by a fluorescent lamp flickering at a power frequency of 50 Hz according to the first embodiment of the present invention. In FIG. 2, (a1) is a general power supply frequency (50 Hz), (b)
1) shows a change in brightness due to blinking when the fluorescent lamp is turned on using the power supply of (a1); (c1)
Is the exposure timing of the image sensor when the control of the frequency of the reference clock is not performed in the video camera according to the present embodiment, and (d1) integrates the luminance signal of the video imaged at the timing of (c1). Integrated value of time, (e1)
Is a determination result of the flicker reduction control unit 11.

In the image pickup device circuit section 2, FIG.
The signal captured at the timing 1) is subjected to sampling and gain control by the CDS / AGC circuit 3,
The video signal processing circuit 6 performs various processes to generate a video signal. The luminance component of the video signal is integrated for one field period by the luminance signal integrating circuit 12 to obtain an output as shown in FIG.

Then, the flicker detection circuit 13 generates the signal shown in FIG.
(D1) It is detected that the level of the field of B is at a medium level with the peak of the field of A, and it is determined that there is a flicker period of 3 fields. Thereby, in the three-field period, the reference clock of the field at the timing of B is set to the normal state, the reference clock of the field at the timing of A is increased, and
2 (f1) at the imaging timing as shown in FIG. 2 (f1) by slowing down the reference clock of the field at the timing of, and controlling the frequency so that the integrated value of each field approaches the value of the B field. g1), and a video camera device that prevents deterioration of an image due to the cycle of the fluorescent lamp can be obtained.

<Second Embodiment> Next, a video camera apparatus according to a second embodiment of the present invention will be described.

FIG. 3 is a diagram showing the relationship between the image pickup timing of a video camera and the output image of a subject illuminated by a fluorescent lamp blinking at a power frequency of 50 Hz according to the second embodiment of the present invention. In FIG. 3, (a2) is a general power supply frequency (50 Hz), (b)
2) shows a change in brightness due to blinking when the fluorescent lamp is turned on using the power supply of (a2); (c2)
Is a video camera according to an embodiment of the present invention,
Exposure timing of the image sensor when control of the frequency of the reference clock is not performed, (d2) is an integrated value obtained by integrating the luminance signal of the video imaged at the timing of (c2),
(E2) is a determination result of the flicker reduction control unit 11.

Here, as shown in FIG. 3 (e2), the frequency is controlled such that the brightest luminance level among the obtained integrated values is always set as the control target.
At the imaging timing as shown in (f2), the brightness integrated value becomes as shown in FIG. 3 (g2), and since the brightness level is high, the gain of AGC is suppressed, the S / N of the image is kept good, and the brightness flicker is reduced. A video camera device that prevents deterioration of an image due to a cycle of a fluorescent lamp can be obtained.

<Third Embodiment> Next, a third embodiment of the video camera apparatus of the present invention will be described.

FIG. 4 shows the relationship between the image pickup timing of a video camera and the output image of a subject illuminated by a fluorescent lamp blinking at a power frequency of 50 Hz according to a third embodiment of the present invention. In FIG. 4, (a3) is a general power supply frequency (50 Hz), (b)
3) shows a change in brightness due to blinking when the fluorescent lamp is turned on using the power supply of (a3); (c3)
Is the exposure timing of the image sensor when the control of the frequency of the reference clock is not performed in the video camera of the present embodiment, and (d3) is the integration of the luminance signal of the video imaged at the timing of (c3). Integrated value of time, (e3)
Is a determination result of the flicker reduction control unit 11.

Here, as shown in FIG. 4 (e3), the frequency is controlled such that the darkest luminance level among the obtained integrated values is always set as the control target.
At the imaging timing as in (f3), the luminance integrated value as shown in FIG. 4 (g3) is obtained, and the luminance level is low. A preventive video camera device can be obtained.

<Fourth Embodiment> Next, a video camera apparatus according to a fourth embodiment of the present invention will be described.

FIG. 5 is a schematic configuration diagram of a video camera device according to a fourth embodiment of the present invention. The configuration of the flicker reduction control unit 11 of FIG. 1 is shown in FIG. A color difference signal integrating circuit 28 for integrating the BY color difference signals; a level comparing circuit 29 for comparing the level of the color difference integrated value for each field to detect a field having the highest level and good saturation; According to the result, by providing the oscillation circuit control circuit 30 for controlling the oscillation frequency of the reference clock, the R signal of the video signal can be added together with the integration of the luminance signal.
Video that integrates the saturation of the -Y and BY signals and sets the field with the best saturation as the control target, thereby maintaining good color reproducibility, reducing luminance flicker, and preventing image degradation. A camera device can be obtained.

<Fifth Embodiment> Next, a video camera apparatus according to a fifth embodiment of the present invention will be described.

FIG. 6 is a schematic configuration diagram of a video camera device according to a fifth embodiment of the present invention. FIG. 6 shows the configuration of the flicker reduction control section 11 in FIG. Instead of the circuit 13, a color temperature detection circuit 31 for detecting a color temperature signal, which is a signal for controlling the white balance of an image, and a color flicker is detected by comparing the color temperature signal for each field. A color flicker detection circuit 32 and an oscillation circuit control circuit 33 that controls the oscillation frequency of the reference clock based on the detection result.

With this configuration, color flicker is detected based on the level of the color temperature detection signal for white balance control for each field instead of integrating the luminance signal, and the result of the flicker detection is shown in FIG. By controlling the frequency of the reference clock, it is possible to obtain a video camera device in which the control of the white balance is kept good, whereby the color reproducibility is kept good, the color flicker is reduced, and the deterioration of the image is prevented.

Also, with the configuration of FIG. 6, in the obtained video camera device, color flicker can be suppressed, but luminance flicker cannot be suppressed. This is because, due to the characteristics of the fluorescent lamp, a flicker of 20 Hz occurs every three fields as shown in FIG. 2 (b1) for the luminance, but the fluorescent characteristics of the fluorescent lamp (green, red, blue) This is because the shutter timing is not limited to 20 Hz by controlling the reference clock frequency as in the video camera device having this configuration, and the shutter timing differs for each field.

Here, in the video camera apparatus having the configuration shown in FIG. 6, the luminance flicker can be suppressed together by sequentially controlling the AGC of the luminance for each of the three fields A, B, and C in FIG. A video camera device can be obtained.

<Sixth Embodiment> Next, a video camera apparatus according to a sixth embodiment of the present invention will be described.

FIG. 7 is a schematic block diagram of a video camera device according to a sixth embodiment of the present invention. FIG. 7 shows a configuration of the flicker reduction control section 11 in FIG. In addition to the circuit 13, there is provided an illuminance sensor 37 for detecting a change in illuminance of illumination, and an illuminance rise detection circuit 38 for detecting a rise in illuminance in the illuminance detection result.

With this configuration, in the video camera device, when the flicker of the luminance is detected due to the influence of the lighting device, the imaging timing as shown in FIG.
The reference clock is controlled so that the imaging timing as in 4) is obtained, and the output waveform of the illuminometer (on the flickering cycle of the fluorescent lamp)
By imaging in the predetermined range of FIG. 8 (e4), when the image has flicker due to the influence of the fluorescent light,
It is possible to obtain a video camera device in which an image is taken at a predetermined point in the lighting cycle of the illumination for each field, flicker is suppressed from occurring, and image deterioration is prevented.

<Seventh Embodiment> Next, a video camera apparatus according to a seventh embodiment of the present invention will be described.

FIG. 9 is a schematic configuration diagram of a video camera device according to a seventh embodiment of the present invention. FIG. 9 shows the configuration of the flicker reduction control section 11 in FIG. In addition to the flicker detection circuit 32, an illuminance sensor 37 for detecting a change in illumination illuminance and an illuminance rise detection circuit 38 for detecting a rise in illuminance in the illuminance detection result are provided.

According to the configuration of FIG. 9, in a video camera device for detecting color flicker, when a color flicker is detected due to the influence of a lighting device, for example, when the color flicker is detected by 20H.
When it occurs at z, the reference clock is controlled so that the imaging timing as shown in (c4) of FIG.
An image is taken at a predetermined point in the lighting cycle of the fluorescent lamp by taking an image at the hatched portion of 4), so that a video camera device that prevents image deterioration can be obtained.

[0050]

Since the video camera apparatus of the present invention has the above-described configuration, the invention according to claim 1 detects a flicker frequency from a luminance signal integrated value for each field,
By controlling the frequency of the reference clock accordingly, it is possible to prevent image deterioration due to the cycle of the fluorescent lamp.

According to the second aspect of the present invention, it is possible to maintain the S / N ratio of an image good, reduce luminance flicker, and prevent image deterioration.

According to the third aspect of the present invention, it is possible to prevent the image from flying white, increase the upper limit illuminance of the image, reduce luminance flicker, and prevent image deterioration.

Further, according to the present invention, the color reproducibility can be kept good, the luminance flicker can be reduced, and the deterioration of the image can be prevented.

Further, according to the fifth aspect of the present invention, the color flicker frequency is detected from the color temperature detection signal for each field, and the frequency of the reference clock is controlled in accordance therewith, so that the deterioration of the color signal due to the fluorescent lamp cycle is reduced. Can be prevented.

Further, according to the invention of claim 6, it is possible to reduce flicker of luminance simultaneously with flicker of color signals.

According to a seventh aspect of the present invention, when a flicker due to the influence of a fluorescent light is occurring in an image, an image is picked up at a predetermined point in a lighting cycle of lighting for each field. By controlling the clock frequency, it is possible to suppress the occurrence of image flicker.

According to the eighth aspect of the present invention, when color flicker occurs in an image due to the influence of a fluorescent light,
For each field, it is possible to control the clock frequency so that an image is taken at a predetermined point in the lighting cycle of the illumination, thereby suppressing the occurrence of color flicker in the image.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a video camera device of the present invention.

FIG. 2 is an image pickup timing chart by the image pickup device according to the first embodiment of the video camera device of the present invention.

FIG. 3 is an image pickup timing diagram of an image pickup device according to a second embodiment of the video camera device of the present invention.

FIG. 4 is an image pickup timing chart by an image pickup device according to a third embodiment of the video camera device of the present invention.

FIG. 5 is a configuration diagram showing a fourth embodiment of the video camera device of the present invention.

FIG. 6 is a configuration diagram showing a fifth embodiment of the video camera device of the present invention.

FIG. 7 is a configuration diagram showing a sixth embodiment of the video camera device of the present invention.

FIG. 8 is an image pickup timing diagram of an image pickup device according to a sixth embodiment of the video camera device of the present invention.

FIG. 9 is a configuration diagram showing a seventh embodiment of the video camera device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lens 2 Image sensor circuit part 3 CDS / AGC circuit 4 Image sensor drive circuit 5 Timing / synchronous signal generation circuit 6 Video signal processing circuit 7 Video camera device control circuit (CPU) 8 Power supply circuit 9 Input / output I / F 10 Reference clock Generation circuit 11 Flicker reduction control unit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Seiji Muramoto 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka F-term (reference) 5C021 PA16 PA52 PA92 YA07 5C024 AA01 AA03 CA07 DA01 FA01 FA11 GA45 HA06 HA09 HA10 HA18 HA20 JA32 5C065 AA01 BB21 CC01 DD02 GG11 GG14 GG15 GG22 GG24

Claims (8)

[Claims] 1. A solid-state imaging device having an electronic shutter function, driving means for driving the solid-state imaging device based on a vertical synchronization signal formed by dividing a reference clock, and a luminance signal for each field are integrated. An integrating means, a flicker detecting means for detecting flicker due to an influence of a lighting cycle of the lighting means from the integrated value, and a clock frequency controlling means for controlling a frequency of a reference clock in accordance with a result of the detection. A video camera device for preventing image deterioration. 2. The method according to claim 1, wherein the integrating means compares the integrated value of the luminance signal for each field, sets the largest integrated value of the luminance signal to a target value, and controls the frequency of the reference clock for each field. The video camera device according to claim 1, wherein: 3. The integration means compares the integrated value of the luminance signal for each field, thereby setting the smallest integrated value of the luminance signal to a target value and controlling the frequency of the reference clock for each field. The video camera device according to claim 1, wherein: 4. A color signal for each field is detected,
2. The video camera apparatus according to claim 1, wherein the color reproducibility of each field is compared, the color signal of the best field is set to a target value, and the frequency of the reference clock is controlled for each field. 5. A solid-state imaging device having an electronic shutter function, driving means for driving the solid-state imaging device based on a vertical synchronization signal formed by dividing a reference clock, and a color temperature of an image for each field. Color temperature detecting means for detecting,
A video comprising: flicker detecting means for detecting color flicker due to the influence of the lighting cycle of the illuminating means from a color temperature detection signal; and clock frequency control means for controlling the frequency of a reference clock according to the detection result. Camera device. 6. The chrominance signal is obtained by performing the above-described gain control of the luminance signal for each field separately in three systems of control repeated for every three fields and performing flickerless processing on flicker generated at 20 Hz. 6. The video camera device according to claim 5, wherein the flicker of luminance is reduced simultaneously with the flicker of (1). 7. When the presence of flicker is detected by flicker detecting means for detecting flicker due to the influence of the lighting cycle of the lighting means from the integrated value of the luminance signal,
2. A device according to claim 1, wherein a means for detecting a lighting cycle of the lighting is added, and a clock frequency is controlled for each field so that an image is taken at a predetermined point in the lighting cycle of the lighting. The video camera device according to the above. 8. A means for detecting a lighting cycle of a light when a color flicker detecting means for detecting a color flicker due to an influence of a lighting cycle of the lighting means from the integrated value of the luminance signal detects presence of color flicker. Is added to each field to control the clock frequency so that an image is picked up at a predetermined point in the lighting cycle of the illumination, to suppress the occurrence of color flicker in the image, and to reduce the image deterioration due to the fluorescent lamp cycle. 6. The video camera device according to claim 5, wherein the video camera device is configured to prevent the video camera.