JPH07281649A - Image storing device having frame thinning function - Google Patents

Abstract

PURPOSE:To provide an image storing device having a frame thinning function for reducing the stored amount of images by extracting images only when an object to be photographed is moved and storing them. CONSTITUTION:An image 1 changing with the lapse of time is photographed by a camera 2 and inputted. When the movement of an object to be photographed is detected by a sensor 3, an image storing device 4 extracts images inputted through the camera 2 and stores them. On television 5 images stored in the image storing device 4 are displayed and confirmed. By extracting and storing images in a memory only when the object movement is detected by the sensor 3, the amount of storing images when the object is not moved for a long time is reduced and thus an inexpensive image storing device capable of effectively utilizing an image storing medium is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image storage device having a frame thinning function used for security, surveillance devices and the like.

[0002]

2. Description of the Related Art In recent years, a time-lapse video tape recorder has been generally used as an apparatus for accumulating images with a change over time. An example of the above-described conventional image storage device will be described below with reference to the drawings. FIG. 3 is a schematic block diagram of a conventional image storage device. In FIG. 3, 1 is an image accompanied by a change over time.
A camera 2 is used for inputting an image. 5 is a TV,
Display an image. A video tape recorder 14 stores the image input from the camera 2.

The operation of the image storage device configured as described above will be described below. First, camera 2
The more input image 1 with a change over time is periodically stored in the video tape recorder 14. To confirm the stored image, the video tape recorder 14 is operated to display the image on the television 5.

[0004]

However, with the above configuration, even when the subject is not moving for a long time,
Since the images are uniformly stored in the video tape recorder, there is a problem that a large number of similar images are stored.

In view of the above problems, it is an object of the present invention to provide an image storage device having a frame thinning function that reduces the amount of stored images by extracting and storing only images when a subject moves. To do.

[0006]

In order to solve the above-mentioned problems, an image storage apparatus having a frame thinning function of the present invention includes a sensor for detecting the movement of an object and a movement of the object by the sensor. An image storage means for extracting an image at the time of detection and storing it in a memory, and a configuration for displaying the stored image on a television for confirmation are provided.

[0007]

According to the present invention, with the above-described structure, only the image when the subject is moving is extracted and accumulated, so that the amount of accumulated images when the subject is not moving for a long time is reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An image storage device having a frame thinning function according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic block diagram of an image storage device having a frame thinning function according to an embodiment of the present invention. In FIG. 1, 1 is an image with a change over time,
Reference numeral 2 denotes a camera, which is used for inputting the image 1 with a change over time. A sensor 3 detects that the subject has moved. Four
Is an image storage device, and when detected by the sensor 3, the image storage device 4 extracts and stores the image input from the camera 2. Reference numeral 5 denotes a television for displaying and confirming the image stored in the image storage device 4.

FIG. 2 is a block diagram of an image storage device having a frame thinning function for explaining the operation in the embodiment. In FIG. 2, 1 is an image with a change over time, 2 is a camera, 3 is a sensor, 4 is an image storage device, and 5 is a television. Reference numeral 6 is an A / D converter, and 7 is a CPU. When the sensor 3 detects, the CPU 7 controls the timing of the A / D converter 6, and the A / D converter 6 receives the video obtained from the camera 2. Convert the signal to a digital signal. Reference numeral 8 denotes a frame memory which sequentially stores the image data converted into digital signals by the A / D converter 6. A ROM 9 stores a program for controlling the CPU 7. 10 is RAM, CP
Stores work data when U7 operates. A buffer memory 11 stores the image data stored in the frame memory 8. Reference numeral 12 is a display controller, which is a frame memory 8
It is used when reading the image data that has been expanded to. 1
3 is an encoder for displaying an image on the television 5,
The image data read by the display control unit 12 is converted into a video signal.

The operation of the image storage apparatus having the frame thinning function configured as described above will be described below with reference to FIGS. 1 and 2. Image buffer memory 11
When the sensor 3 detects that the subject has moved, the image 1 input from the camera 2 with time change is extracted according to the timing control from the CPU 7. Then, the extracted image is converted into a digital signal by the A / D converter 6, temporarily stored in the frame memory 8, and then stored in the buffer memory 11.

When the image stored in the buffer memory 11 is to be confirmed on the television 5, the target image is read from the buffer memory 11 and once expanded in the frame memory 8. The image data developed in the frame memory 8 is read by the display control unit 12, converted into a video signal by the encoder 14, and then displayed on the television 5.

As described above, according to the present embodiment, only the image obtained when the sensor 3 detects that the subject has moved is extracted and stored in the buffer memory 11, so that the subject does not move for a long time. The amount of accumulated images can be reduced.

Although the television 5 is a television in the first embodiment, the television 5 may be a display device such as a CRT or LCD, a video tape recorder, or a printer.

In the embodiment, the buffer memory 11 is a buffer memory, but the buffer memory 11 is SRA.
Not limited to memory such as M, DRAM, and flash memory,
It may be an auxiliary recording device such as a floppy disk, a hard disk, an optical disk, or a memory card.

[0016]

As described above, according to the present invention, the image is stored only when the sensor detects that the subject has moved, and the image is stored in the memory, so that the image is stored when the subject is not moving for a long time. It is possible to provide an inexpensive image storage device that can reduce the amount and can effectively use the image storage medium.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an image storage device having a frame thinning function according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an image storage device having a frame thinning function for explaining the operation in the embodiment.

FIG. 3 is a schematic block diagram of a conventional image storage device.

[Explanation of symbols]

 1 Image with time change 2 Camera 3 Sensor 4 Image storage device 5 Television 7 CPU 8 Frame memory 11 Buffer memory 12 Display control unit

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Naohisa Motomura 1-12-20 Mitsumachi, Higashi-ku, Hiroshima City Matsushita Electric Information Systems Hiroshima Research Institute

Claims (1)

[Claims] 1. A sensor for detecting movement of an object,
Frame thinning, characterized by comprising an image storage means for extracting an image when the sensor detects that the subject has moved and storing it in a memory, and an image confirmation means for displaying the stored image on a television. An image storage device having a function.