JPH09284751A - Monitoring camera device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily find and confirm abnormality by recording high quality images and transmitting them as needed. SOLUTION: The high quality images for which a monitoring object is photographed in a camera part 1 are compressed in a compression part 2 and compressed images are generated. They are successively stored in the storage part 7 with a prescribed capacity and circulatingly stored so as to overflow and discard the oldest image. Then, when a sound sensor, a human sensor or a timer for timing prescribed time, etc., installed so as to detect the abnormality of the monitoring object outputs trigger signals, they are received in a trigger input part 10. They are discriminated in a discrimination part 8 through a control part 6. Then, at the point of time of discrimination, the storage operation of the storage part 7 is stopped and the compressed images are read from the storage part 7 and transmitted by a transmission line 4 through an output part. At the time, since the images for a sheet number set in a setting part 9 immediately before and after receiving the trigger signals are read and transmitted, conditions before and after the abnormality are compared and examined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera device which stores a high quality image and transmits the image based on a trigger input.

[0002]

2. Description of the Related Art Conventionally, a surveillance camera device has been used as a device for photographing an object and generating an image in a surveillance system. FIG. 3 is a diagram showing an embodiment of a conventional surveillance camera device. Reference numeral 1 is a camera unit that generates an image of a monitoring target. A compression unit 2 compresses the generated image to generate a compressed image. Reference numeral 3 denotes an output unit which transmits the compressed image by a method according to the monitoring system and which is constituted by, for example, a modem. Reference numeral 4 is a transmission line composed of a telephone line or the like. Reference numeral 5 denotes an operation input unit for inputting a setting instruction such as a zoom process of the camera unit 1. Reference numeral 6 is a control unit that controls each unit.

A camera unit 1 installed for photographing a surveillance object photographs the subject and generates a monitoring image, and a compression unit 2 compresses the image supplied by the camera unit 1 by a required method to generate an image image. , And transmits the compressed image to a monitoring device (not shown) via the modem of the output unit 3 and the transmission path 4. Further, the zoom state and the like are set from the operation input unit 5 so that the camera unit 1 can obtain an appropriate image.

By the way, in the case of monitoring the abnormality by displaying the transmitted monitoring image on the screen of the monitor, it is desirable that the monitoring image has a high image quality and the number of images per unit time (frame rate) is large. This is because it is possible to reliably and easily detect the abnormality and confirm the abnormality by looking at the monitor image with high image quality and large frame rate.

However, a general surveillance system often uses a narrow band transmission line such as a telephone line, and there is a problem that it is difficult to transmit a high quality image.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a monitoring camera device in which a monitoring image is recorded with high image quality and the image is transmitted when necessary. The purpose is to provide.

[0007]

In order to achieve the above object, a camera section for photographing a monitoring target to generate an image, and a compression section for compressing the image to generate a compressed image,
An output unit that converts the compressed image into a format according to a transmission path and transmits the transmission path, a transmission path to which the output unit is connected, an operation input unit that inputs a setting instruction of the camera unit, and a control unit that controls each unit. And a trigger input unit for receiving a trigger signal, wherein the compressed image is read from the storage unit and transmitted based on the input of the trigger signal. I decided to do it.

Further, it comprises a discriminating section for discriminating the input trigger signal and discriminating the number of frames of the compressed image, and a setting section for setting a required value in the camera section or the storage section.
By setting the number of frames before, after or before and after the trigger signal in the setting unit, the compressed image is read from the storage unit based on the number of frames based on the input of the trigger signal.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With the above configuration, FIG.
This will be described with reference to FIG. FIG. 2 is a diagram for explaining the relationship between the storage method of the storage unit of the surveillance camera device according to the present invention and the trigger signal. Prior to receiving the trigger signal, the latest compressed image is sequentially stored in a storage unit having a predetermined capacity, and the oldest image is cyclically stored so as to overflow and be discarded. After receiving the trigger signal, the storage operation in the storage unit is stopped at a required timing, and, for example, the images stored until immediately before the trigger signal is input, or the set number of images before and after the trigger signal is received are read out. Send.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a surveillance camera device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a surveillance camera device according to the present invention. Reference numeral 1 is a camera unit that generates a high-quality image of a surveillance target. A compression unit 2 compresses the generated high quality image to generate a compressed image. Reference numeral 3 denotes an output unit which converts the compressed image into a format according to the transmission path and transmits the converted image, for example, a modem or the like when the transmission path is a telephone line.
Reference numeral 4 is a transmission line such as a telephone line for transmitting the compressed image. An operation input unit 5 inputs a setting instruction of the camera unit 1. Reference numeral 6 is a control unit that controls each unit. Reference numeral 7 denotes, for example, a hard disk device or a DVD (Digital Versatile) for storing the compressed image.
Disk) is a storage unit composed of a device, a 2-port memory, or the like. Reference numeral 8 is a determination unit that determines the input trigger signal and the number of compressed images. Reference numeral 9 denotes the camera unit 1 or the storage unit 7.
Is a setting unit that performs necessary settings for the. A trigger input unit 10 is an input interface of a trigger signal supplied by a sensor (not shown) when an abnormality is detected or a camera image transmission request signal (image transmission request signal) from a monitoring device (not shown) side. Is.

The storage and output operations of the surveillance camera apparatus according to the present invention will be described with reference to FIGS. Incidentally, in FIG. 1, the same parts as those in the conventional example are designated by the same reference numerals, and the description of the overlapping operation will be omitted. The trigger input unit 10 receives a trigger signal output from a sensor (not shown) installed to detect an abnormality of a required monitoring target, for example, a sound sensor, a human detection sensor, or a timer that counts a predetermined time. The determination unit 8 determines the trigger signal via the control unit 6. As shown in FIG. 2, when the trigger signal is discriminated, the storage operation of the compressed image that is cyclically and continuously stored in the storage unit 7 is stopped, and the compressed image is stored in the FIFO (First In Fir
It is read by the st out) operation and transmitted via the telephone line (4) via the modem of the output unit 3.

Further, by setting the number of images to be stored before and after the trigger input (determination) from the operation input unit 5 to the setting unit 9 in advance, the determination unit 8 determines after the trigger signal is input. After storing the predetermined number of images, the storage operation may be stopped and the compressed image may be read from the storage unit 7 by the FIFO operation. As another transmission method, when the storage unit 7 is configured by a 2-port memory, the remaining image after the trigger input (determination) is stored at the time when the trigger signal is input, and immediately read from the 2-port memory. You may make it transmit it.

In the above example, the trigger signal is the abnormal signal supplied by the sensor or the timer signal. However, the trigger signal is not limited to them, and for example, from a monitoring device (not shown) side. A camera image transmission request signal (image transmission request signal) may be transmitted, and the monitoring image may be transmitted according to the image transmission request signal.

Further, the operation input section 5 to the setting section 9 are previously set.
If the zoom value of the camera unit 1 is set for each trigger, an enlarged image of the required instrument can be obtained in the case of a device abnormality. Therefore, know the numerical value indicated by the instrument from the enlarged image. You can also

[0015]

As described above, the present invention provides a surveillance camera device in which a high-quality image is recorded and the high-quality image is transmitted if necessary. Therefore,
After the occurrence of an abnormality, the recorded high-quality images are sequentially transmitted, and the receiving side can display the desired number of images (frame rate) per unit time after receiving the same image. As a result, for example, if a high-quality image taken by a high-quality high-speed camera is used, the monitoring image can be displayed in slow motion, so that an abnormality can be detected and confirmed more reliably and easily than ever before. Produce an effect.

Further, since the image after the trigger input (discrimination) can be stored, there is an advantage that the states before and after the abnormality can be compared and examined.

Further, since the hard disk device or the DVD device is used for storing the compressed image, there is an advantage that writing and reading can be performed at a high speed and a large number of high quality images can be stored.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a surveillance camera device according to the present invention.

FIG. 2 is a diagram illustrating a relationship between a storage method of a storage unit of a surveillance camera device according to the present invention and a trigger signal.

FIG. 3 is a diagram showing an example of a conventional surveillance camera device.

[Explanation of symbols]

 1 camera section 2 compression section 3 output section 4 transmission path 5 operation input section 6 control section 7 storage section 8 discrimination section 9 setting section 10 trigger input section

Claims (10)

[Claims] 1. A camera unit for photographing a monitored object to generate an image, a compression unit for compressing the image to generate a compressed image, and converting the compressed image into a method according to a transmission path. An output unit for transmitting, and a transmission line connected to the output unit,
In a surveillance camera device comprising an operation input unit for inputting a setting instruction of the camera unit and a control unit for controlling each unit, a storage unit for storing the compressed image and a trigger input unit for receiving a trigger signal. A surveillance camera device configured to read a compressed image from the storage unit and transmit the compressed image based on an input of a trigger signal. 2. The surveillance camera apparatus according to claim 1, wherein a plurality of compressed images are cyclically stored in the storage unit in frame units. 3. The surveillance camera apparatus according to claim 1, wherein storage of a new image is stopped when the trigger signal is received. 4. A determination unit that determines an input trigger signal and determines the number of frames of a compressed image, and a setting unit that sets a required value in the camera unit or the storage unit. 3. The compressed image is read from the storage unit based on the number of frames by inputting a trigger signal by setting the number of frames before, after, or before and after in the setting unit. Item 3
The described surveillance camera device. 5. The surveillance camera apparatus according to claim 4, wherein when the trigger signal is input, the designated image is read while writing the remaining image in the storage unit. 6. The surveillance camera apparatus according to claim 5, wherein the storage unit is configured by a two-port memory. 7. The surveillance camera apparatus according to claim 1, wherein the trigger signal is an abnormal signal from a sensor. 8. The surveillance camera apparatus according to claim 1, wherein the trigger signal is an image transmission request signal. 9. The hard disk device as the storage unit, or
The surveillance camera device according to claim 1, wherein the surveillance camera device is configured by a DVD device. 10. The surveillance camera apparatus according to claim 9, wherein the storage unit is used as a FIFO.