A data security transmission method of visible light communication of cmos camera
A technology for visible light communication and data confidentiality, which is applied in the field of visible light communication, can solve the problems that the security and integrity of visible light communication data transmission cannot be guaranteed, and cannot extract valid data, so as to ensure the security and integrity in a simple and effective way. Effect
Active Publication Date: 2021-08-27
CHANGAN UNIV
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[0003] The purpose of the present invention is to solve the problem that the data transmission security and integrity of visible light communication in the above-mentioned prior art cannot be guaranteed, and to provide a data confidentiality transmission method for visible light communication of a CMOS camera. In order to receive the correct original data information, otherwise the valid data cannot be extracted from the received information
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[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0022] The principle of the present invention based on the CMOS camera for visible light communication is: the existing smart phone camera modules all use CMOS photosensitive modules, and adopt rolling shutter electronic shutters. The highest synchronization speed of most cameras (that is, the mechanical shutter curtain spans the imaging The time required by the component) does not exceed 1 / 250s, and the shutters with a speed higher than this time are not fully open. At this time, if the time difference between the front and rear curtains is equal to the shutter time you want to shoot, you can ensure The area of the photosensitive element scanned by the gap left between is the desired exposure time, and this gap is scanned from top to bottom until a frame of image scanning is completed. Therefore, if the LED status is on when the first row is...
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A data security transmission method for visible light communication of a CMOS camera, comprising the following steps: when sending data, performing interval coding on original data codes and error codes; When imaging, the CMOS camera performs light integration of the corresponding length of time, and obtains a bright and dark fringe image, and extracts the original data information from the light and dark fringes of the image through image processing technology; if the shutter time is incorrect when shooting, the light and dark in the obtained image The stripes are different from the original data, and the original data cannot be obtained without knowing the characteristic information of the interval error code. Through the method of the invention, correct original data can only be received when the encryption rule is known, otherwise, the original data cannot be obtained. This method is simple and effective, and ensures the security and integrity of data transmission.
Description
technical field [0001] The invention belongs to the field of visible light communication, and relates to a data security transmission method for visible light communication of a CMOS camera. Background technique [0002] Visible light communication is a short-distance high-speed wireless optical communication technology developed on the basis of LED technology. The basic principle of visible light communication is to use the characteristics of light-emitting diodes (LEDs) to switch faster than fluorescent lamps and incandescent lamps, and to communicate through high-frequency flickering of LED light sources. Light represents 1, and no light represents 0, sending out high-speed optical signals. The information is obtained through photoelectric conversion. Compared with traditional infrared and radio communications, visible light communication systems have the advantages of high transmission power, no electromagnetic interference, and no need to apply for spectrum resources. ...
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IPC IPC(8): H04B10/116H04K1/02H04N5/235
CPCH04B10/116H04K1/02H04N23/73
Inventor 张赞杨虎宁井炫琳黄兆武刘栩滔罗崔月岳凡
Owner CHANGAN UNIV