Automatic illumination compensating apparatus and method for organism feature recognition
A biometric recognition and automatic compensation technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of too bright target objects and unfavorable use of image information of target objects.
Inactive Publication Date: 2006-12-27
SHANGHAI ISVISION INTELLIGENT RECOGNITION TECH
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However, the previous lighting compensation cannot well meet the user's needs, and will not compensate for the area of interest to the user. As a result, the target object of interest will be too bright or too dark, which is not conducive to our use of the image information of the target object.
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[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0019] see figure 1 As shown, the illumination automatic compensation device for biometric identification of the present invention includes a video acquisition circuit 1, which is connected to the video input port 31 in the video acquisition card 3 through the video output port 2, the video acquisition card 3 is connected to the memory 4, and the memory 4 Connect with CPU 5, CPU 5 has a COM port 6, RS232, COM port 6 is connected to a RS232-RS485 converter 7, the other end of the converter 7 is connected with signal control port 8, RS485. The signal control port 8 is connected to the digital signal processor 9 , and the digital signal processor 9 is connected to the video acquisition control circuit 10 , so as to control the illumination compensation of the video acquisition circuit 1 .
[0020] see figure 2 Shown, the video signal that video camera v...
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The invention relates to a light automatic compensator which recognizes biological character, and relative method, wherein said invention comprises: a video collecting circuit, a video picking card, a memory, a central processor, a digit signal processor and a video picking control circuit; the video information picked by video picking circuit via video collecting card and memory enters into central processor to be processed; the central processor has biological character recognize algorism and brightness judge algorism, to send out adjust command based on the brightness of characteristic part, to control the video picking control circuit to send out control signal, to adjust the parameter of video picking circuit, until the video information brightness picked by video picking circuit meets demand. The invention can make video information meet the demand of biological character recognition, to accurately judge biological character.
Description
technical field [0001] The invention relates to the field of biometric feature recognition, in particular to an illumination automatic compensation device and method for biometric feature recognition. Background technique [0002] In applications such as video surveillance and photography, external light has a great influence on the imaging quality of the target object, which has an adverse effect on the detection of the target in the scene. Especially in the field of biometric identification, if a biometric image that meets the quality requirements cannot be obtained, then performing biometric identification is not the same as trying to find a fish. In addition, in the case of constant external environment lighting, if the target object is in different positions, such as front light and back light, the grayscale distribution of the target object in the video or photo will be quite different. This will cause great differences in the detection process of the images of the sa...
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IPC IPC(8): G06K9/00G06K9/20
Inventor 曾文斌王国田黄全会张绪进吴剑平
Owner SHANGHAI ISVISION INTELLIGENT RECOGNITION TECH