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Data secret transmission method for CMOS camera visible light communication

A technology for visible light communication and data confidentiality, which is applied in the field of visible light communication and can solve the problems that the security and integrity of data transmission in visible light communication cannot be guaranteed, and effective data cannot be extracted.

Active Publication Date: 2020-10-27
CHANGAN UNIV
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Problems solved by technology

[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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  • Data secret transmission method for CMOS camera visible light communication
  • Data secret transmission method for CMOS camera visible light communication
  • Data secret transmission method for CMOS camera visible light communication

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Embodiment Construction

[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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Abstract

A data secret transmission method for CMOS camera visible light communication comprises the following steps: when data is sent, performing space coding on original data codes and error codes; when thedata is received, adjusting shutter time of the CMOS camera according to the interval error code length, enabling the CMOS camera to perform light integration of the corresponding time length duringimaging, shooting a bright and dark stripe image, and extracting original data information from bright and dark stripes of the image through an image processing technology, wherein if the shutter timeduring shooting is incorrect, the bright and dark stripes in the obtained image are different from the original data, and the original data cannot be obtained under the condition that the interval error code feature information is not known. By means of the method, correct original data can be received only under the condition that encryption rules are known, and otherwise, the original data cannot be obtained. The method is simple and effective, and guarantees the safety 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
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