Image defogging method, FPGA and defogging system including FPGA

Abstract

The invention discloses an image defogging method. The method comprises the steps that a first original image is obtained through an image collecting device; an Idark dark passage of the first image is calculated based on the first original image; an overall situation atmospheric parameter A of the first original image is estimated by using the Idark dark passage; the atmospheric transmissivity t of the first original image is estimated based on the Idark dark passage and the overall situation atmospheric parameter A; fog in the original image is removed by using the overall situation atmospheric parameter A and the atmospheric transmissivity t, and a clear image J is obtained after defogging. The image defogging method can guarantee the normal and stable work of a system when a 30 frame-per-second video image is processed; the integration degree and the reliability of the system are high, and the performance is excellent; the design is flexible, the developing period is short, and the cost is low; the system can be maintained in a long term and can be updated in site, the design is conveniently improved according to customer requirements, and the circuit structure of the whole does not need to be changed.

Description

technical field [0001] The invention relates to data processing, in particular to an image defogging method and an FPGA-based defogging system. Background technique [0002] In hazy weather, the scattering effect of atmospheric particles causes serious distortion of the scene image captured by the optical sensor, and its color value, contrast and other characteristics are destroyed, such as figure 1 As shown, this affects human visual perception and computer post-processing. When the above scene images are applied to fields such as intelligent transportation, the consequences will be more serious. Therefore, the rapid, accurate and effective dehazing of hazy images has become a research hotspot in the field of computer vision. [0003] At present, the research and implementation of fog image processing mainly focus on the software development on the PC platform, focusing on the processing at the algorithm level. There are two main ideas for this kind of defogging processi...

AI Technical Summary

Problems solved by technology

Considering that many practical systems need to perform real-time defogging processing on video images with a certain frame rate, these algorithms obviously cannot meet the requirements of real-time performance and high-speed video streaming.

Images