JPH0445035B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a stereoscopic image capturing device for obtaining a stereoscopic image using left and right binocular parallax.

BACKGROUND ART It has been known that stereoscopic viewing is possible by capturing left and right images of a subject having binocular parallax using a pair of optical systems and viewing the resulting images with the left and right eyes, respectively.

As a method of imaging a subject, there is a method of imaging left and right images having left and right binocular parallax using two imaging cameras, two optical lens systems, and two photoelectric conversion means. By the way, when humans see something with their naked eyes, they see it with both their left and right eyes, and both eyes see an image with the same visual acuity and the same hue. However, if this balance between left and right is disrupted,
For example, if you view with a red filter attached to only one eye, your eyes will become tired and it will be very difficult to see. This phenomenon is similar when viewing a stereoscopic image, and there is a drawback that the image becomes difficult to see unless the image adjustments of the left and right images, such as brightness and white balance, are uniform.

Problems to be Solved by the Invention Conventionally, when capturing a three-dimensional image using two imaging cameras, the image of each imaging camera must be adjusted as described above, making the operation complicated. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a three-dimensional image pickup device with significantly improved operability.

Means for Solving the Problems The present invention provides a pair of imaging means for forming left and right images of a subject having left and right binocular parallax and outputting a video signal, and a pair of apertures for adjusting the amount of light of the images. and a pair of signal processing means for separating and processing the video signal into a luminance signal and a color difference signal. an aperture amount control means for controlling the aperture amount of the aperture so that the aperture amount becomes equal; and a signal control means for receiving the left and right color difference signals and controlling the signal processing means so that the white balance of the left and right images is equal. This is a three-dimensional image capturing device characterized by comprising:

Effect According to the present invention, the luminance signal of each video signal having binocular parallax is given to the aperture amount control means, and the aperture amount of the aperture is controlled so that the brightness of the left and right images is equal, and the color difference The signal is given to the signal control means, and the white balance of the left and right images is controlled to be equal. Therefore, image adjustment work for left and right images becomes unnecessary.

Embodiment FIG. 1 is a simplified block diagram showing the configuration of a stereoscopic image capturing apparatus 1 according to an embodiment of the present invention. The stereoscopic imaging device 1 includes a pair of imaging tubes 2a and 2b, which are imaging means for forming an image of a subject on an imaging surface and converting it into an electrical signal, and a lens for forming an image on the imaging surface. 3a, 3b, a left video processing section 4a which is one signal processing means that processes the left video signal outputted from the imaging tube 2a, and the other signal processing means which processes the right video signal outputted from the imaging tube 2b. It includes a right video processing section 4b, a synchronization section 5 for synchronizing the timing of each left and right video, and a left and right video control section 6.

FIG. 2 shows the left video processing section 4a and the right video processing section 4.
FIG. 4 is a block diagram showing the electrical configuration of the left and right video controllers 6 and 6. FIG. In the left video processing section 4a, the output of a preamplifier 7a that amplifies the video signal provided from the image pickup tube 2a is filtered through a low-pass filter (hereinafter abbreviated as LPF) 8a that allows only low-frequency components to pass, and a band-pass filter that allows only specific frequencies to pass. (hereinafter abbreviated as BPF) 9a.

In LPF8a, the luminance signal (Y) of the video signal
only are extracted. The BPF 9a extracts color component signals from the video signal and sends the output to the separation circuit 10.
give to a. The separation circuit 10a separates the color component signal into a red signal (R) and a blue signal (B). R
The amplifier circuit 11a amplifies the red signal (R), and the B amplifier circuit 12a amplifies the blue signal (B). Each of the signals is transmitted to the R detection circuit 13a and the B detection circuit 14.
a, and the (RY) amplification circuit 15a
The (B-Y) amplification circuit 16a converts and amplifies the color difference signals (R-Y) and (B-Y).

The color difference signals (RY), (B-Y) and the luminance signal (Y) are converted into a composite video signal by an encoder 17a and a mixing circuit 18a, and the signal is sent from a terminal 19a to another device (not shown). Output. The detection circuit 20a is supplied with color difference signals (R-Y) and (B-Y), detects the signals, and outputs a signal to an automatic white balance control circuit 21a that automatically adjusts white balance. The automatic aperture control circuit 22a controls the aperture 23a as described later.

The right video processing section 4b has the same configuration as the left video processing section 4a, and corresponding circuits are designated by reference numeral b instead of reference numeral a.

The left and right image control section 6 includes an aperture amount left and right comparison control circuit 24 which is an aperture amount control means, and a white balance left and right comparison control circuit 25 which is a signal control means. The operation of the three-dimensional image capturing device 1 having the above configuration will be described below.

The image of the object to be imaged enters the three-dimensional image capturing device 1, is focused by the lenses 3a and 3b, and is adjusted to an appropriate amount of light by the apertures 23a and 23b, as will be described later. 2a, 2b
The image is formed on the photoconductive film.

Since the left video processing section 4a and the right video processing section 4b perform similar operations, the operations of the left video processing section 4a and the left and right video control section 6 will be explained from here on. The image pickup tube 2a outputs an electric signal corresponding to an image formed by the photoelectric conversion effect of the photoconductive film, and the video signal is given to the preamplifier 7.
The preamplifier 7a amplifies the video signal, and its output is given to an LPF 8a and a BPF 9a.The LPF 8a provides a luminance signal (Y), and the BPF 9a provides a chrominance signal. The luminance signal (Y) is (R-
Y) amplifier circuit 15a, (B-Y) amplifier circuit 16a,
The signal is applied to the mixing circuit 18a, the automatic aperture control circuit 22a, and the aperture amount left/right comparison control circuit 24, respectively.

The automatic aperture control circuit 22a calculates the amount of light incident on the image pickup tube 2a from the voltage level of the applied luminance signal, and adjusts the aperture amount of the aperture 23a so that the amount of light becomes a predetermined appropriate amount. Control.
The aperture amount left and right comparison control circuit 24 compares the voltage levels of the respective brightness signals of the left and right video signals, and corrects the aperture amounts of the automatic aperture control circuits 22a and 22b so that the brightness levels of each video are the same. do.

On the other hand, the color signal is separated into a red signal and a blue signal by a separation circuit 10a, and the separated signals are amplified by an R amplification circuit 11a and a B amplification circuit 12a, respectively. Since this color signal includes a color carrier wave which is a high frequency component, the R detection circuit 13a,
High frequency components are excluded by the B detection circuit 14a. and (RY) amplifier circuit 15a and (B
-Y) The color signal is converted into color difference signals (RY) and (B-Y) by the amplifier circuit 16a.

Color difference signals (R-Y) and (B-Y) are encoder 1
7a and subjected to quadrature two-phase modulation to become a carrier color signal. Then, it is mixed with the luminance signal in the mixing circuit 18a to become a composite video signal at the terminal 19.
It is output from a to other video processing circuits. The color difference signals (R-Y) and (B-Y) are applied to a detection circuit 20a for detection, and are input to an automatic white balance control circuit 21a. In the circuit 21a, the voltage level of each color difference signal is compared with a preset reference voltage level, and the R amplifier circuit 11a is connected so that the white balance is achieved.
and controls the amplification factor of the B amplifier circuit 12a.

The white balance left and right comparison control circuit 25 compares the voltage levels of the left and right color difference signals, and controls the R amplifier circuits 11a and 11 of the automatic white balance control circuits 21a and 21b so that the left and right white balance controls are the same.
The control amounts of the amplification factors of the B and B amplifier circuits 12a and 12b are corrected.

As explained above, in this embodiment, the brightness levels and white balance of the left and right images are automatically controlled to be equal, so the operator can
To easily obtain an easy-to-see stereoscopic image without performing complicated adjustment work.

Effects As described above, according to the present invention, there is no need to adjust the left and right images, and the operability is significantly improved and convenience is increased.

[Brief explanation of drawings]

FIG. 1 shows a stereoscopic image capturing device 1 according to an embodiment of the present invention.
FIG. 2 is a block diagram showing the electrical configuration of the left video processing section 4a, the right video processing section 4b, and the left and right video control section 6. DESCRIPTION OF SYMBOLS 1... Stereo image imaging device, 2a, 2b... Image pickup tube, 3a, 3b... Lens, 4a... Left image processing section, 4b... Right image processing section, 6... Left and right image control section, 11a, 11b ...R amplifier circuit, 12a, 1
2b...B amplifier circuit, 21a, 21b...Automatic white balance control circuit, 22a, 22b...Automatic aperture control circuit, 24...Aperture amount left and right comparison control circuit, 2
5... White balance left/right comparison control circuit.

Claims (1)

[Scope of Claims] 1. A pair of imaging means for forming left and right images of a subject having left and right binocular parallax and outputting a video signal, a pair of apertures for adjusting the amount of light of the images, and the video signal. and a pair of signal processing means for separating and processing a luminance signal and a color difference signal; and a signal control means that receives the left and right color difference signals and controls the signal processing means so that the white balance of the left and right images is equal. A three-dimensional image capturing device.