Foggy day video processing system and method based on DSPs
A technology for video processing and foggy weather, which is applied in the field of foggy weather video processing system, can solve the problems of foggy weather monitoring video blurring, color attenuation, low contrast, etc., achieve strong market application potential, low power consumption, and low hardware cost Effect
Active Publication Date: 2013-10-09
HOHAI UNIV CHANGZHOU
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Problems solved by technology
[0006] The present invention aims at the blurred, low-contrast, and color attenuation problems of monitoring video in foggy days, and at the same time provides a foggy day video processing system and method based on DSP in order to realize the effectiveness and real-time performance of defogging processing. The system uses a dedicated high-speed DSP image processing module for image acquisition, processing and display of images. As a special microprocessor, the DSP chip has a unique Harvard structure and pipeline operation that make its calculation speed for image processing much faster than ordinary The advanced microprocessor greatly improves the real-time performance of the detection, and the DSP is small in size and low in power consumption, making it easy to install and move
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[0034] Specific implementation plan
[0035] Attached below Figure 1-4 The principle and specific implementation of the present invention will be further described in detail:
[0036] The DSP-based foggy video processing system includes a shooting transmission module for video surveillance, a high-speed DSP processing module for defogging the captured video, and a display module for displaying the defogging video. The shooting module is mainly an ordinary CCD camera. The scene is shot through the camera, and then transmitted to the DSP processing module through the data line; in the DSP high-speed processing module, each frame of image is processed by defogging algorithm, and the processed image is transmitted to Display device for display ( figure 1 ). Among them, two DSP chips are needed to work together, one chip completes the video capture and display, and the other completes the realization of the defogging algorithm.
[0037] One of the fast defogging algorithms used include...
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The invention discloses a foggy day video processing system and method based on DSPs. The foggy day video processing system comprises a shooting and transmitting module, a high-speed DSP processing module and a display module, wherein the shooting and transmitting module is used for video monitoring, the high-speed DSP processing module is used for conducting defogging processing on shot videos, and the display module is used for displaying the videos after defogging. The foggy day video processing system conducts control and calculation through two DSPs, wherein one DSP is used for driving and shooting of a camera and driving and displaying of a displayer, and the other DSP is used for realizing a defogging algorithm of the foggy day video processing system and method. According to the foggy day video processing system and method based on the DSPs, the improved dark-channel defogging algorithm is adopted, codes of the defogging algorithm are realized through C language, the calculation of a transmission function is optimized, a look-up table method, an optimized code mapping method and other ways are conducted on logarithm operation in the codes so as to realize real-time defogging of the videos.
Description
Technical field [0001] The invention relates to a foggy video processing system based on image enhancement and a method for clearing foggy video by using the system, and belongs to the technical field of digital image processing and video monitoring. Background technique [0002] In the process of building a harmonious society and building a moderately prosperous society in my country, the hot issue that the public is most concerned about is security. The video surveillance system uses image monitoring as a means to monitor and record on-site images in real time, allowing staff to intuitively grasp the scene However, the video surveillance system, especially the outdoor video surveillance system, when encountering foggy weather, the video taken is degraded obviously, which is not conducive to human observation and subsequent analysis. [0003] Fog is produced when the relative humidity of air molecules reaches saturation and some air molecules are concentrated into small water dropl...
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IPC IPC(8): H04N7/18H04N5/21
Inventor 李庆武朱浩糜靖峰霍冠英束代群张伟刘艳
Owner HOHAI UNIV CHANGZHOU