JP2895676B2 - Video camera multiple image display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for obtaining multiple images of a video camera having a wide-angle lens and a zoom lens.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a conventional system which has both a wide-angle lens and a zoom lens and switches between a wide-angle image signal and a zoom image signal obtained by them to obtain a video signal.

A fixed-focus wide-angle lens 1 and a zoom lens 2
Incident on the first CCD 3 and the second CCD 3
4 via a sample-and-hold circuit and AGC circuits 5 and 6 to switch (S
The signals are sent in parallel up to W) 7. The terminal W of the switch 7 is a terminal on the wide-angle image side, and the terminal Z is a terminal on the zoom image side.

The signal passing through the switch 7 is divided into color difference signals BY and RY and a luminance signal Y in a signal processing circuit 8, and a video signal is taken out through an encoder 9.

[0005] The first and second CCDs 3 and 4 are provided with a vertical synchronizing signal driver 10 and a horizontal synchronizing signal driver 1.
1 driven. Synchronous signal generation circuit (SSG) 13
The synchronizing signal generated at (1) is sent to both drivers 10 and 11 at timing by the timing IC 12.
The synchronization signal is also sent to the angle-of-view frame gate 14 to cut out the angle-of-view frame.

By switching the switch SW7 from the terminal W to the terminal Z, the user can instantly switch from the wide-angle screen to the zoom screen or vice versa.

Further, by rapidly switching the SW7 by a system controller (not shown), a part B-1 of the zoom screen B to the wide-angle screen A is cut out by a cutout frame B-2 as shown in FIG. By cutting out and incorporating, a composite screen C can be obtained.

[0008]

SUMMARY OF THE INVENTION The above-mentioned prior art is:
Despite the high cost of using two expensive components such as a lens, a CCD, and their associated circuits in the imaging circuit, only two functions were provided as described above. Further, since the optical axes of the lenses coincide with each other, it is impossible to simultaneously view an image captured on the wide-angle side and an image captured on the zoom side of the same location being imaged. As shown in C of FIG. 3A, there is a portion where the image on the wide-angle side is covered by the image on the zoom side. See the wide-angle image of that part clearly
It is not possible. An object of the present invention is to obtain a function of simultaneously and clearly viewing images on the wide-angle side and the zoom side.

[0009]

According to the present invention, means for generating a wide-angle image signal by a wide-angle lens, means for generating a zoom image signal by a zoom lens, and switch means for switching these image signals are provided. A signal processing circuit for processing the output image signal into a color difference signal and a luminance signal and outputting the processed signal, and switch means for adding a zoom image signal to the luminance signal output from the signal processing circuit when the image signal is switched to a wide-angle image signal. Signal processing circuit for zoom image signal
When adding to the luminance signal of the output of
The band is limited by the
I got it.

[0010]

According to the present invention having the above-described structure, when it is desired to view a multiplex image corresponding to a multi-exposure screen of a normal camera in which a zoom screen overlaps a wide-angle screen, a zoom image signal is provided by a switch means. Is added to the Y signal of the wide-angle image,
You can see the overlapping image of the wide-angle screen and the zoom screen. In addition, a zoom signal is mixed with a wide-angle image signal.
Sometimes, the signal on the zoom side to be added is
Two images overlap because the band is limited by the filter
Image can be prevented from becoming complicated.

[0011]

FIG. 1 is a block diagram showing an embodiment of the present invention. Each part from the wide-angle lens 1 to the angle-of-view frame gate 14 is the same as in FIG.

The video signal captured by the wide-angle lens 1 is
After being photoelectrically converted by the CCD 3, the light reaches the SW 7 through the sample hold and AGC circuit 5. Similarly, an image captured by the zoom lens 2 is photoelectrically converted by the second CCD 4 and reaches the SW 7 through the sample hold and AGC circuit 6. Therefore, the same function as the conventional one is performed by operating the SW7.

In the case of the present invention, the SW on the zoom lens 2 side
7 arrives at the amplifier 20 through the SW2.
After passing through 1, the signal passes through a band-pass filter 22, extracts a relatively high frequency component, and is mixed with the Y signal output from the signal processing circuit 8 via a capacitor. When the zoom image signals are mixed, if the signals are added as they are, the screen becomes complicated.

The SW 21 is limited by the gate 23 so as to operate only when the SW 7 is switched to the wide angle side.
The gate 23 is supplied with a signal from the system controller and a signal from the user switch 24, and operates only when the system controller is operated to the wide side and the user desires multiple exposure. That is, the multiple exposure effect can be obtained only when the SW7 is switched to the wide-angle screen by the system controller.

FIG. 3B shows an example of a screen when the images are mixed. The zoom screen B overlaps the wide-angle screen A.

[0016]

According to the present invention, the same portion can be viewed simultaneously with the wide-angle screen and the zoom screen. Wide angle screen image
When mixing the zoom signal with the signal,
The signal on the system side is band-limited by a band-pass filter.
The two images overlap and the image becomes complicated
To see two images simultaneously and clearly
Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a block diagram of a conventional example.

FIG. 3A is an explanatory diagram of incorporating a zoom screen into a conventional wide-angle screen, and FIG. 3B is an explanatory diagram of an additional function according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wide-angle lens 2 Zoom lens 3, 4 CCD 5, 6 Sample hold, AGC circuit 7, 21 Switch 8 Signal processing circuit 9 Encoder 22 Band pass filter

Claims (1)

(57) [Claims] 1. A means for generating a wide-angle image signal by a wide-angle lens, a means for generating a zoom image signal by a zoom lens, a switch means for switching these image signals, a color difference signal and a luminance signal a signal processing circuit for processing and outputting the has an image signal and a switching means for applying the luminance signal output of the signal processing circuit a zoom image signal when it is switched to the wide-angle image signal, the signal processing circuit a zoom image signal In addition to the output luminance signal
When the zoom image signal is
A multi-image display device for a video camera, wherein a band is limited and then added to a luminance signal .