JP3192306B2 - Camera-integrated recording device with monitor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera-integrated camera-equipped recording device having a camera for photographing a subject and a monitor such as a liquid crystal display.

[0002]

2. Description of the Related Art A conventional camera-integrated VTR with a monitor of this type will be described with reference to FIG.

A conventional camera-integrated VTR with a monitor is
As shown in FIG. 3, a liquid crystal panel 1 for displaying an image captured by a camera unit (not shown), and the liquid crystal panel 1
, A D / A converter 3 for converting a digital video signal into an analog signal, and a system control microcomputer for controlling the brightness of the liquid crystal panel 1 by the brightness signal level by brightness signal level control switches 4 and 5 6
And

In the camera-integrated VTR with monitor configured as described above, the luminance signal level input to the liquid crystal panel 1 by the system control microcomputer 6 by operating the luminance signal level control switches 4 and 5. Control the increase or decrease of Thus, the brightness of the display image on the liquid crystal panel 1 can be adjusted.

[0005]

In the above-mentioned conventional camera-integrated VTR with a monitor, the luminance signal level is increased in sunlight outdoors to increase the brightness of the display image on the liquid crystal panel 1, and the luminance signal level is adjusted indoors. It is necessary for the photographer to operate the luminance signal level control switches 4 and 5 to change the brightness of the liquid crystal panel 1 according to the photographing conditions, such as making the display image of the liquid crystal panel 1 slightly darker by reducing the There was a problem that the usability was very poor.

The present invention has been made in view of the above points, and provides a camera-integrated VTR with a monitor capable of automatically and appropriately controlling the brightness of a monitor section by control information in the camera section. The purpose is to:

[0007]

In order to solve the above-mentioned problems, a camera-integrated recording apparatus with a monitor according to the present invention determines that the light source is sunlight based on white balance control information in the camera section. In such a case, a control means for automatically controlling the luminance signal level of the monitor unit is provided.

[0008]

Further, based on the iris control information and the white balance control information in the camera section, the light source
The more sunlight is determined and the iris is closed,
So as to increase the luminance signal level of the monitor unit is made by providing a control means for automatically controlling.

[0010] In the monitor camera with built-in type recording apparatus according to the present invention, based on the sulfo white balance control information put into the camera unit is a signal corresponding to the brightness and circumstances surrounding the use of equipment, the luminance of the monitor Since the signal level is controlled, the brightness of the monitor unit can be automatically and appropriately adjusted according to the change in the light source .

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a camera-integrated VT with a monitor according to the present invention will be described.
One embodiment of R will be described with reference to FIGS. 1 and 2, and the same parts as those in the above-described conventional example will be denoted by the same reference numerals and description thereof will be omitted.

A camera-integrated VTR with a monitor according to this embodiment
As shown in FIG. 1, a camera control microcomputer 7 for performing auto iris control and auto white balance control according to shooting conditions, a camera signal processing circuit 8, A lens unit (including an iris control unit) 9, and the iris control information and the white balance control information output from the camera control microcomputer 7 are configured to be transferred to the system control microcomputer 16. ing.

Here, the auto iris control and the auto white balance control will be described below.

The auto iris control generally uses a combination of a dual pattern photometry method and a peak sensing method. The dual pattern photometry method is a method of obtaining a weighted average value with emphasis on a central portion and a lower portion from a video signal, comparing this with a reference luminance, and performing feedback control of an iris. According to this method, the subject is often present at the center and the lower part, so that the brightness of the subject is controlled to match the reference brightness, and the exposure is appropriately controlled in the case of weak backlight.

The peak sensing method is a method in which the maximum value of a video signal is obtained, and the iris is feedback-controlled so that the maximum value matches the reference luminance. According to this method, since the maximum luminance in the image does not saturate, the overexposure phenomenon can be prevented even under over-direct light conditions.
However, in reality, if only the peak sensing method is operated, the image may be underexposed. Therefore, the effect of the peak sensing is weakened by combining with the above-described dual pattern photometry method.

On the other hand, the auto white balance control basically utilizes the property that an achromatic color is obtained by mixing various components of one image. That is, R,
This is based on the fact that when the G and B signals are combined, they become white.

However, in the case of a subject that deviates from the principle of mixing all colors into an achromatic color, for example, when photographing a red or green cloth over the entire screen or photographing a sunset, it is impossible to reproduce colors. May come out. Therefore, a range to which this basic principle can be applied is defined in advance, and if it is within this range, it is determined that the light source has changed, and the white balance is controlled. The actual white balance control is performed by fixing the G signal and controlling the R and B signals.

The automatic white balance control uses the R,
The light source is determined based on the B control signal and the iris information (current brightness). That is, the light source is determined to be a halogen when it is slightly bright and the R control signal is small, a sunlight (outdoor) when it is bright and the R control signal is large, and a fluorescent lamp when it is dark.

The system control microcomputer 16 in the camera-integrated VTR with monitor configured as described above.
Will be described below with reference to the flowchart shown in FIG.

First, the light source is sunlight, and the iris is 9
If it is closed by 0% or more, it is determined that the current shooting condition is sunny outside the room. Then, since it is very bright due to sunlight, the brightness signal level is increased so that the brightness of the liquid crystal panel 1 is controlled to be bright.

The light source is sunlight, and the iris is 7
When it is closed by 0% or more, it is determined that the current shooting condition is cloudy outside the room. Then, since it is slightly brighter due to sunlight, the brightness signal level is slightly increased to control the brightness of the liquid crystal panel 1 to be slightly brighter.

Next, if the light source is sunlight but not very bright, it is determined that the current shooting conditions are outdoors and the weather is rain. Then, control is performed so that the brightness of the liquid crystal panel 1 is standardized with the luminance signal level as standard.

Further, if it is determined that the light source is a fluorescent lamp or a halogen lamp, it is determined that the current photographing condition is indoors. Then, the brightness signal level is controlled to be slightly lower, and the brightness of the liquid crystal panel 1 is made slightly darker.

As described above, the system control microcomputer 16 of the present embodiment determines the appropriate value of the brightness of the liquid crystal panel 1 based on the two information of the iris control information and the white balance information, and controls the luminance signal level. Is what you do.

The luminance signal level may be basically controlled based only on the iris control information. However, when a bright outdoor room is photographed from the room, the iris is narrowed and the liquid crystal panel becomes bright. On the contrary, when taking a picture of a dark room from the outside, the iris opens and the liquid crystal panel becomes dark, and when taking a very bright halogen lamp or the like directly in the room, the iris is narrowed and the liquid crystal panel becomes bright. And other problems occur.

Therefore, by using the white balance information, it is possible to control the liquid crystal panel so that the light source is brightened only by sunlight, and to prevent a malfunction to some extent when the control is performed based only on the iris control information. be able to.

Also, it is possible to determine whether the light source is sunlight or not by using only the white balance information, and the brightness of the liquid crystal panel can be adjusted accordingly. be able to.

[0028]

Monitor with a camera-integrated recording apparatus according to the present invention is, since the configuration as described above, based on the sulfo white balance control information put in the camera unit in accordance with the photographing conditions, the brightness of the monitor By controlling the signal level, the brightness of the monitor can be automatically and appropriately adjusted, so that the photographer does not need to change the brightness of the monitor with a control switch or the like, greatly improving the usability. Can be done.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing an embodiment of a camera-integrated VTR with a monitor according to the present invention.

FIG. 2 is a flowchart showing an operation of a system control microcomputer in one embodiment of the camera-integrated VTR with monitor of the present invention.

FIG. 3 is a schematic block diagram showing a conventional camera-integrated VTR with monitor.

[Explanation of symbols]

 Reference Signs List 1 liquid crystal panel 2 backlight 3 D / A converter 7 camera control microcomputer 8 camera signal processing circuit 9 lens 16 system control microcomputer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-6973 (JP, A) JP-A-58-142680 (JP, A) JP-A-64-4181 (JP, A) JP-A-62 25598 (JP, A) Japanese Utility Model Hei 1-175067 (JP, U) Japanese Utility Model Utility Model Sho 61-187166 (JP, U) Japanese Utility Model Utility Model Hei 3-44976 (JP, U) (58) Field surveyed (Int. ⁷ , DB name) H04N 5/222-5/257 H04N 5/57

Claims (2)

(57) [Claims] 1. A monitor having a camera unit for capturing an image of a subject while performing auto white balance control according to a shooting condition, and a monitor unit for displaying an image captured by the camera unit. In the camera-integrated recording device, based on white balance control information in the camera unit, when it is determined that the light source is sunlight, a control unit that performs automatic control so as to increase the luminance signal level of the monitor unit is provided. A camera-integrated recording device with a monitor, which is provided. 2. A camera unit for taking an image of a subject while performing auto iris control and auto white balance control in accordance with a photographing condition, and a monitor unit for displaying an image taken by the camera unit. In the camera-integrated recording device with monitor having the above, based on the iris control information and white balance control information in the camera unit, it is determined that the light source is sunlight , and as the iris is closed, the brightness signal of the monitor unit A camera-integrated recording device with a monitor, further comprising control means for performing automatic control so as to increase the level.