Digital image monitoring control system capable of automatic adjusting lens diaphragm and detecting object movement

An automatic adjustment, digital image technology, applied to the components, optics, and exposure control of the TV system, which can solve the problems that the image monitoring system cannot break through

Inactive Publication Date: 2003-10-22
CHUNGHWA TELECOM CO LTD
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  • Abstract
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Problems solved by technology

[0004] It can be seen that the current video surveillance systems developed by manufacturers still have technically insurmountable deficiencies, and technical breakthroughs and improvements are needed.

Method used

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  • Digital image monitoring control system capable of automatic adjusting lens diaphragm and detecting object movement
  • Digital image monitoring control system capable of automatic adjusting lens diaphragm and detecting object movement
  • Digital image monitoring control system capable of automatic adjusting lens diaphragm and detecting object movement

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Embodiment Construction

[0012] Such as figure 1 As shown, the system is mainly composed of CCD camera 1 and lens 2, image capture card 3, image brightness-reflectance decomposition unit 4, image brightness change detection unit 5, and object movement detection unit 6. The image capture card 3 with the lens 2 and the CCD camera 1 continues to capture digital images of the photographed object; then the captured image is decomposed and converted into two components such as brightness and reflectance by the image brightness-reflectance decomposition unit 4 part of the frequency spectrum; next, the image brightness change detection unit 5 is used to analyze the brightness spectrum variation of two consecutive images, and the variation is used to control the enlargement or reduction of the lens aperture; and the object movement detection unit 6 is used for analysis The amount of change in the reflectance spectrum of two consecutive images is used to determine whether the object in the image screen is movin...

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Abstract

The system comprises assorted lens, image catching card for catching digital image of the object to be catched by CCD video camera. The catched image is decomposed of by image brightness-reflectance decomposition unit to be two parts of spectrums as brightness and reflectance and image brightness variation detecting unit is provided to analyse bright ness spectrum variable of two continuous images as well as to use this variable to control the enlarging or reducing of the iris diaphragm. In addition, object motion detecting unit is provided to analyse reflectance spectrum variable of two continuous images, which is used to judge whether object in image picture is moved or not in order to have correct judgement for state of the object motion.

Description

technical field [0001] The invention relates to a digital image monitoring system, in particular to a digital image monitoring system which can automatically adjust the lens aperture and detect object movement. Background technique [0002] In general image monitoring systems, the images of vehicles captured by traffic law enforcement units are often used as the basis for proving that drivers have violated regulations; in the security measures of financial institutions, images captured by surveillance cameras are also used to track down crimes such as robbery; In department stores, surveillance cameras are also used to prevent plundering. The scope of its application is very wide, so many manufacturers have studied it. [0003] At present, the simple video monitoring systems on the market generally only have a simple video recording function, and the video monitoring systems with strong functions can judge whether there is any change in the video screen. The value (Threshol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B7/00H04N5/225H04N5/232
Inventor 吴坤荣简大为郑伯顺吕光钦
Owner CHUNGHWA TELECOM CO LTD
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