JP3278937B2 - Video signal recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal recording apparatus capable of obtaining a multi-exposure image used for analyzing a motion such as a golf swing.

[0002]

2. Description of the Related Art When obtaining multiple exposure images with a silver halide camera,
In general, shooting is performed using a multi-flash strobe that emits light with a slight time difference. In this case, since a plurality of images are overlapped on one film, the difference in exposure between the stationary portion and the moving portion during development is large.

For example, as shown in FIG. 4, when only a human arm is moved, and a flash is fired in the state of (1) to (4), shooting is performed. While the exposure is triple, the arm that is the moving part is 1
Exposure, and when developing, the difference in exposure becomes large.

[0004]

Conventionally, in order to clarify moving parts and prevent overexposure of stationary parts, the background is darkened at the time of photographing, and at the time of development, the stationary parts are initially masked to balance the overall exposure balance. Although some measures have been taken such as taking, there was a problem that it was very time-consuming.

Accordingly, the present invention provides a video signal recording apparatus capable of easily and instantaneously obtaining a multiple exposure image with an exposure balance.

[0006]

According to the present invention, there is provided a memory in which video signals of one field or one frame are sequentially written in a predetermined cycle, and a moving part detecting means for detecting a motion of an image from the video signals written in the memory. A new moving portion detecting means for detecting a newly moving portion from a moving portion detecting result every predetermined period, and reading a video signal of a newly moving portion from a memory based on the new moving portion detecting result every predetermined period. Recording means for recording on a recording medium.

[0007]

In the present invention, only the video signal of the portion newly moved at a predetermined period is recorded on the recording medium instead of the previous one. Therefore, it is possible to easily and instantaneously obtain a multiple exposure image in which both the stationary portion and the moving portion are properly exposed (not too dark and not saturated).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, reference numeral 1 denotes an imaging lens, 2 denotes a color separation prism, and 3R denotes a CC for picking up a red color separation image.
D solid-state image sensor, 3G is a C for capturing a green separation image.
The CD solid-state image sensor 3B is a CCD solid-state image sensor for capturing a blue separation image.

A CCD driver 4 is provided for the image pickup devices 3R to 3B.
Necessary signals such as a read pulse, a transfer pulse, and a reset pulse are supplied and driven. Image sensor 3R-3
For example, a charge sweeping pulse is supplied to B from the CCD driver 4 to control the charge accumulation period (electronic shutter control).

The image pickup devices 3R, 3G, and 3B output a red signal R, a green signal G, and a blue signal B for one field for each field. Imaging device 3R,
The color signals R, G, B output from 3G, 3B are CDS
Circuits (correlated double sampling circuits) 5R, 5G, 5B,
AGC circuits 6R, 6G, 6B, A / D converters 7R, 7
G, 7B, white balance adjustment circuits 8R, 8G, 8B
The data is supplied to the field memories 10R, 10G, and 10B via the gamma correction circuits 9R, 9G, and 9B.

The color signals R, G, and B for one field are written in the memories 10R, 10G, and 10B at predetermined intervals. 1 written to memory 10G
The green signals G for the fields are sequentially read out and supplied to the moving part detecting circuit 11, and the moving part detecting circuit 11 writes the green of one field before (the predetermined field before) written in the field memory 12. The address of the moving part is detected by comparing with the data of the signal G.

Before the color signal G for one field is newly written in the memory 10G, the green signal G for one field before a predetermined field written in the memory 10G is read out from the memory 10G and stored in the memory 10G. 12 is written. The reason why the green signal G is used to detect the moved portion is that the green signal G is close to the luminance signal and the address of the moved portion can be detected with high accuracy.

The information on the address of the moved part detected by the moving part detecting circuit 11 is supplied to a new moving part detecting circuit 13, which stores an address memory 1
4 is compared with the information of the address of the previously moved part written in 4, and the address of the newly moved part is extracted.

The information of the address of the moved part detected by the moving part detecting circuit 11 is supplied to and stored in the address memory 14, and the address of the previously moved part in the next processing of the new moving part detecting circuit 13 is stored. Information.

The information on the address of the newly moved part extracted by the new moving part detecting circuit 13 is stored in the memories 10R and 10R.
G and 10B are supplied as read control signals, and data is read from corresponding addresses. Data read from the memories 10R, 10G, and 10B is converted into, for example, a luminance signal and a color difference signal by a matrix circuit 15 and supplied to a recording / reproducing unit 16 to be recorded on a recording medium such as a semiconductor memory or a card-shaped recording medium. . In this case, the information is recorded at the corresponding address on the recording medium based on the information on the address of the newly moved portion.

The memory 10R, 10R is provided every predetermined field.
Each time the color signals R, G, B for one field are written to G, 10B, the address of the moving part is detected by the moving part detecting circuit 11 as described above, and the new moving part detecting circuit 13 The address of the moved part is extracted, and only the data of the newly moved part is replaced with new data on the recording medium.

Thus, on the recording medium of the recording / reproducing section 16, data of a multiple exposure image in which a plurality of field images at predetermined intervals are multiplexed is recorded. In this case, as described above, since only the data of the newly moved portion on the recording medium is replaced with the new data, the data does not overlap, and the multiple exposure image in which both the stationary portion and the moving portion have the proper exposure is formed. Obtainable.

Here, the time interval of the multiple exposure image is determined by storing the color signals R and R in the memories 10R, 10G and 10B as described above.
It can be set arbitrarily by adjusting the field interval at which G and B are taken. The number of field images constituting the multiple exposure image can be arbitrarily set by adjusting the number of images recorded by the recording / reproducing unit 16.

When confirming the multi-exposure image formed as described above, the data of the multi-exposure image is reproduced by the recording / reproducing section 16 and the reproduced data is converted by the D / A converter 17 into analog data. After being converted into a signal, it is supplied to the output unit 18. Then, after a video signal of a signal format suitable for a monitor (not shown) is output from the output unit 18, the video signal is supplied to the monitor to check a multiple exposure image.

Hereinafter, the processing for obtaining the data of the multiple exposure image described above will be described in detail with reference to a rod 100 that rotates about a certain axis P as shown in FIG.

First, the color signals R, G, and B for one field, which are captured at a timing when the rod 100 is at the rotational position and obtained through a necessary process, are stored in the memories 10R and 10R.
G, 10B. Then, data of, for example, a luminance signal and a color difference signal related to the color signals R, G, and B for one field are supplied to the recording / reproducing unit 16 and recorded on a recording medium. At this time, the green signal G for one field written to the memory 10G is read and written to the memory 12.

Next, after a predetermined field, the rod 10
The color signal R for one field, which is obtained at a timing when the rotation position of 0 is at the rotation position and is obtained through a necessary process,
G and B are written to the memories 10R, 10G and 10B. Here, the moving part detection circuit 11 compares the data of the green signal of one field written in the memory 10G and the data of the green signal G of one field before (predetermined field) written in the memory 12 one frame before. Then, the address corresponding to the rotational position of the rod 100 is detected as the address of the moved part (see the section of the moving part detecting circuit 11 in FIG. 3A).

The address information detected by the moving part detecting circuit 11 is supplied to the new moving part detecting circuit 13 and compared with the address information of the previously moved part outputted from the address memory 14 to newly generate the new moving part detecting circuit 13. The address of the moved part is extracted. In this case, the address memory 14 has no information on the address of the previously moved part (FIG. 3).
(See (a) Output section of address memory 14), rod 10
The addresses corresponding to the 0 and the rotational positions are extracted as the addresses of the newly moved parts (see the description of the new moving part detecting circuit 13 in FIG. 3A).

Data is read from the memories 10R, 10G and 10B based on the address information extracted by the new motion detecting circuit 13. Then, data of, for example, a luminance signal and a color difference signal related to this data are supplied to the recording / reproducing unit 16 and recorded at the corresponding address of the recording medium, and the data is replaced (the recording / reproduction in FIG. 3A). (Refer to the section of the reproducing unit 16). In this case, the data of the bar 100 at the rotation position of the bar 100 is replaced with the background data, and the background data corresponding to the rotation position of the bar 100 is
Is replaced by the data of

The information on the address detected by the moving part detecting circuit 11 is written into the address memory 14 (see the entry of the address memory 14 in FIG. 2A). Used for processing. After the address of the moved part is detected by the moving part detecting circuit 11, the green signal G for one field is read out from the memory 10G and written into the memory 12, and the green signal G is processed by the moving part detecting circuit 11 next time. used.

Next, after a predetermined field, the rod 10
The color signal R for one field, which is obtained at a timing when the rotation position of 0 is at the rotation position and is obtained through a necessary process,
G and B are written to the memories 10R, 10G and 10B. Then, the same processing as described above is performed.

That is, in the moving part detecting circuit 11, the rod 1
The address corresponding to the rotational position of 00 is detected as the address of the moved part (see the section of the moving part detecting circuit 11 in FIG. 3A). In addition, the new motion section detection circuit 13
The address information corresponding to the rotational position of the rod 100 is supplied from the address memory 14 as the address information of the previously moved portion (see the output section of the address memory 14 in FIG. 3A). Therefore, in the new movement section detection circuit 13, an address obtained by removing the address corresponding to the rotational position of the bar 100 from the address corresponding to the rotational position of the bar 100 is extracted as the address of the newly moved portion (FIG. 3 (a), the section (solid line) of the new motion detection circuit 13).

Then, based on the address information extracted by the new motion detecting circuit 13, the memories 10R, 10G,
Data is read from 10B, and data relating to the data, for example, a luminance signal and a chrominance signal are supplied to the recording / reproducing unit 16 and recorded at the corresponding address of the recording medium, and the data is replaced (FIG. 3). (See section (a) of the recording / reproducing unit 16 (solid line)). In this case, the rod 100
The background data corresponding to the rotation position of is replaced with the data of the bar 100.

The information of the address detected by the moving part detecting circuit 11 is written in the address memory 14 (see the section of the input of the address memory 14 in FIG. 2A). Also,
After the address of the moved portion is detected by the moving portion detection circuit 11, the green signal G for one field is read from the memory 10G and written to the memory 12.

Next, after a predetermined field, the rod 10
The color signal R for one field, which is obtained at a timing when the rotation position of 0 is at the rotation position and is obtained through a necessary process,
G and B are written to the memories 10R, 10G and 10B. Then, the same processing as described above is performed.

That is, in the moving part detecting circuit 11, the rod 1
The address corresponding to the rotational position of 00 is detected as the address of the moved part (see the section of the moving part detecting circuit 11 in FIG. 3C). In addition, the new motion section detection circuit 13
Is supplied from the address memory 14 with the address information corresponding to the rotational position of the bar 100, as the address information of the previously moved part (see the output section of the address memory 14 in FIG. 3C). . Therefore, in the new movement section detection circuit 13, an address obtained by removing the address corresponding to the rotational position of the bar 100 from the address corresponding to the rotational position of the bar 100 is extracted as the address of the newly moved portion (FIG. 3 (a), the section (solid line) of the new motion detection circuit 13).

Then, based on the address information extracted by the new motion detecting circuit 13, the memories 10R, 10G,
Data is read from 10B, and data relating to the data, for example, a luminance signal and a chrominance signal are supplied to the recording / reproducing unit 16 and recorded at the corresponding address of the recording medium, and the data is replaced (FIG. 3). (C) section of the recording / reproducing section 16 (solid line)). In this case, the rod 100
The background data corresponding to the rotation position of is replaced with the data of the bar 100.

By the above processing, data for obtaining a multiple exposure image as shown in the section of the recording / reproducing section 16 in FIG. 3D is recorded on the recording medium of the recording / reproducing section 16.
As described above, since only the newly moved portion is replaced with new data, there is no excessive exposure due to the multiple exposure of the overlapping portion of the bar 100 and the background portion, and the moving portion of the bar 100 having only one exposure is used. There is no imbalance in exposure.

In the above embodiment, the color signals R, G, and B for one field every predetermined field are taken into the field memories 10R, 10G, and 10B, and a multiple exposure image is obtained from a plurality of field images. However, the color signal R,
G and B are fetched, and similarly, a multiple exposure image can be obtained from a plurality of frame images.

In the above-described embodiment, the output signal of the video camera unit is taken into the memories 10R, 10G, and 10B. However, if the background of the image is stable, the video signal of the VTR, LDP, etc. The output signal of the signal reproducing device can also be used. For example, a multi-exposure image can be obtained by selecting continuous operation frames and loading them one by one into the memories 10R, 10G, and 10B.

[0037]

According to the present invention, only the video signal of the newly moved portion is recorded on the recording medium in place of the previous one every predetermined period, so that both the stationary portion and the moving portion have proper exposure. Multiple exposure images can be obtained easily and instantly.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating an example of a subject in a multiple exposure image.

FIG. 3 is a diagram for explaining a multiple exposure process using a subject in the example of FIG. 2;

FIG. 4 is a diagram for explaining a conventional process for obtaining data of a multiple exposure image.

[Explanation of symbols]

 Reference Signs List 1 imaging lens 2 color separation prism 3R, 3G, 3B CCD solid-state imaging device 4 CCD driver 10R, 10G, 10B, 12 field memory 11 moving part detecting circuit 13 new moving part detecting circuit 14 address memory 15 matrix circuit 16 recording / reproducing part

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 5/225-5/28

Claims (4)

(57) [Claims] 1. A memory in which video signals of one field or one frame are sequentially written in a predetermined cycle, a moving part detecting means for detecting a motion of an image from the video signal written in the memory, and a moving part in the predetermined cycle A new moving portion detecting means for detecting a newly moving portion from the detection result; and reading a video signal of the newly moving portion from the memory based on the new moving portion detecting result for each predetermined period and recording the video signal on a recording medium. A video signal recording device, comprising: recording means. 2. The video signal recording apparatus according to claim 1, wherein the video signal written in the memory is generated by a video camera unit using a CCD solid-state imaging device. 3. The video signal recording device according to claim 1, wherein the video signal written in the memory is reproduced by a video signal reproduction device. 4. The video signal according to claim 1, wherein the video signal written in the memory is of a three primary color system, and the moving portion detecting means detects a moving portion using a green signal. Signal recording device.