Method for obtaining face image under strong light and device thereof
A face image and strong light technology, applied to instruments, character and pattern recognition, computer components, etc., can solve the problems of unclear face images, increase equipment costs, strengthen light sources, etc., to increase the scope of applicable scenarios and save energy. Cost, improve the effect of clear image
Inactive Publication Date: 2015-09-23
DONGGUAN ZKTECO ELECTRONICS TECH
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The light sources used in the existing face image acquisition and recognition technologies are basically infrared light sources, which are easily interfered by infrared light in sunlight, so they are only suitable for indoor application scenarios, and the technology suitable for outdoor use under strong sunlight is still unknown. To be developed and improved
[0003] In the existing technology for obtaining face images under strong outdoor light, it is done by adding a strong active light source, which increases the cost of the equipment and causes the equipment to heat up. Not subject to sunlight interference, and when the intensity of light is strong to a certain extent, affected by the filter and CMOS (Complementary Metal-Oxide Semiconductor, Complementary Metal-Oxide Semiconductor) image sensor factors, the light source cannot be strengthened all the time, resulting in the acquired Face image is not clear
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[0018] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0019] see figure 1 , figure 1 It is a schematic structural diagram of the device for acquiring face images under strong light in the first embodiment. The device includes: a face image acquisition unit 101 , a control unit 102 , a human-computer interaction unit 103 , an external communication unit 104 , a real-time clock circuit 105 and an output control circuit 106 .
[0020] The facial image acquisition unit 101 is connected to the control unit 102, and the control unit 102 is connected to the human-computer interaction unit 103, the external communication unit 104, the real-time clock circuit 105 and the output control circuit 106 respectiv...
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The invention provides a method for obtaining a face image under strong light. The method comprises the steps that whether the position of the face area of people to be collected is in a preset position is judged, if so, a light source modulator regulation light source is controlled to emit a high-frequency light wave signal with preset waveform to the face area of people to be collected such that the high-frequency light wave signal goes through the face area to be reflected to an optical lens, the preset waveform is different any waveform of sun light, the image sensor in the optical lens receives the reflected high-frequency light wave signal of the face area, and the modulator modulates the base band light wave signal of the face area to obtain the image of the face area. In addition, the invention also provides a device for obtaining a face image under strong light. According to the method and the device, the clarity of an obtained face image can be improved, and the cost is saved.
Description
technical field [0001] The invention relates to the technical fields of optics and biology, in particular to a method and device for acquiring human face images under strong light. Background technique [0002] With the development of science and technology, the wide application of the Internet, including the entry and exit of important departments such as airports, banks, military and government agencies, and key control areas, as well as the storage and extraction of important information in computer networks, all require reliable identification. The facial features of the face are the most natural, direct, and convenient means of identification, and it is a non-invasive active identification that is easily accepted by users. The light sources used in the existing face image acquisition and recognition technologies are basically infrared light sources, which are easily interfered by infrared light in sunlight, so they are only suitable for indoor application scenarios, and...
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IPC IPC(8): G06K9/00
Inventor 李治农
Owner DONGGUAN ZKTECO ELECTRONICS TECH