JPS6285584A - Imaging device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video signal recording device having multiple modes.

[Conventional technology]

FIG. 5 is a block diagram showing the outline of a conventional VTR device. In the figure, 1 is a shutter, 2 is a half mirror 1
4 and 5 are heads, S-1 and S-2 are image pickup elements (hereinafter referred to as upper sensors), 5W-3 is a switch, and L is a lens.

A conventional VTR device is configured as described above, and in the moving image mode, the shutter 1 is open and the image is transmitted through the lens L1.
Sensor S-1 through shutter 1 and half mirror 2,
Each image is formed on S-2, and the two images are converted into electrical signals and used as they are as one field's worth of signals.The switch 5W-3 is alternately switched to form one frame of signal, which is then 1 by heads 4 and 5 respectively
Each field was recorded on one helical track.

[Problem that the invention seeks to solve]

Conventional home VTR devices such as those mentioned above are designed for moving pictures, and in particular, VTR devices for still images have a problem in that the number of imaging pixels is small and it is not possible to obtain satisfactory image quality. .

This invention was made in order to solve such problems, and it is possible to capture an image with an optimal number of pixels for both video mode and still image mode, and to make the eyebrow circuit of the image sensor almost common. The object of the present invention is to obtain a video signal recording device capable of performing the following steps.

[Means for solving problems]

The video signal recording device according to the present invention has a first mode, which is a moving picture mode, in which one type of video signal is recorded, and a second mode, in which n types of video signals are spatially offset from each other with respect to the video signal. It also has a still image mode.

[For production]

In the present invention, by recording n spatially offset signals in the still image mode and combining these nl signals during playback, image quality n times higher than in the moving image mode can be obtained.

〔Example〕

Figure 4 shows the spatio-temporal characteristics of vision announced by Robson in 1966. From this figure, it can be seen that the spatial frequency characteristic is wider in the case where the temporal frequency is zero (still image) and the case where it is not zero (moving image). therefore,
When taking still images, it is necessary to increase the number of imaging pixels.

FIG. 1 is a block diagram showing one embodiment of the present invention,
In the figure, 3 is a mirror, 5W-1, 5W-2 are switches, and the same reference numerals as in FIG. 5 indicate the same parts.

In the VTR camera device configured as described above, in the moving image mode, the shutter 1 is open and the contact point of the half mirror 2 is in the state 2a. The image is focused on the sensor S-1 and converted into an electrical signal.

Switches 5W-1 and 5W-2 are both connected to contact A, and are connected to a CCD drive (in this example, CCD drive as a sensor).
(OD), the video signal processing section is the same as the conventional one, and its output is the signal shown in FIG. 3(a).

In the still image mode, the half mirror 2 is at the position 2b, and the shutter 1 is normally open and only opens during exposure.

Here, a case will be described where n=2 and there are two instant sensors. The pixel arrays of the sensors S-"1 and S-2 are as shown in FIG. 2, and are spatially offset from each other and interpolate. This operation sequence is shown in FIG. 3(b).

The shutter is opened during the exposure period from time t1 to t2.

After that, 5W-1 and 5W-2 are connected to contact A by sequence control, and a signal (F
1) S-1t (F-2) 3-1 is read out, and the switches 5W-1 and 5W-2 are connected to contact B, and the signal (F 1 ) S-2 * (F 2 ) s-2 is read out) and ends at time t3. Since these signal outputs have the same output format as the video mode, they can be recorded on a conventional VTR.

During playback, a frame memory (not shown) is used to temporarily store a plurality of spatially offset signals in a plurality of frame memories (two in this embodiment), and each signal is stored in the frame memory. The pattern shown in FIG. 2 can be obtained by extracting the patterns from the above and combining them to form the pattern shown in FIG.

〔Effect of the invention〕

As explained above, the present invention has a first mode in which one type of video signal is recorded and a second mode in which n types of video signals spatially offset from each other with respect to the video signal are recorded. Compared to the first mode, which is a video mode, in the second mode, which is a still image mode, the number of imaging pixels is increased by n times, making it possible to capture images under conditions compatible with the receptors of the human visual system, allowing high-quality video. This has the effect that still images can be obtained with minimal addition of hardware.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the pixel arrangement of the sensor in FIG. 1, and FIG. 3 is a diagram showing the pixel arrangement of the sensor in FIG.
In the timing chart of the video output shown in the figure, (the box represents the moving image mode, the figure (b) represents the still image mode, Fig. 4 shows the spatio-temporal characteristics of visual perception, and Fig. 5 shows the conventional VT).
FIG. 2 is a block diagram schematically showing an R device. In the figure, 1 is a shutter, 2 is a half mirror, 13 is a mirror, L is a lens, S-1 and S-2 are sensors, and 5W-1
, 5W-2 are switches. Agent Patent Attorney 1) Haru Kitatake Figure 2 Figure 4

Claims (1)

[Claims] In a video signal recording device that records video signals on one track for each field, there are two modes: a first mode in which one type of video signal is recorded; A video signal recording device comprising: a second mode for recording a video signal of n≧2).