An Optimal Dehazing Method Based on Image Quality Evaluation

Abstract

The invention discloses an optimal defogging method based on image quality evaluation, which includes: 1) obtaining a series of preliminary candidate defogging images by roughly taking values ​​of transmittance; 2) calculating a series of preliminary candidate defogging images The value of the quality evaluation function, and select the candidate defogged image corresponding to the maximum value as the preliminary estimation result; 3) Obtain a series of accurate candidate defogged images according to the small range of transmittance values; 4) Calculate the exact candidate defogged image Quality evaluation function value, and select the candidate dehazing image corresponding to the maximum value as the optimal dehazing result image. The present invention establishes a brand-new image quality evaluation function; and based on this, the optimal result is selected from each candidate defogging image as the defogging result image, which can be applied to real-time defogging processing of UAV images in foggy days , especially for the foggy UAV image will produce a better defogging effect.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, and relates to an optimal defogging method based on image quality evaluation. Background technique [0002] Image defogging methods have always been a research hotspot in recent years. Image defogging methods based on atmospheric scattering models have been vigorously developed, but unmanned aerial vehicle image defogging is still an unsolved problem. In recent years, UAV aerial photography, as a new observation method, is becoming more and more mature, which also puts forward higher requirements for the dehazing method and dehazing efficiency of UAV images. [0003] UAV images have their own characteristics compared with ordinary images: when the UAV image sensor shoots vertically from high altitude to the ground, the depth of all scene points on the acquired image is almost the same and equal to the flight height, because the flight height is mostly in the For hundreds of mete...

AI Technical Summary

Problems solved by technology

[0002] The image defogging method has always been a research hotspot in recent years. The image defogging method based on the atmospheric scattering model has been vigorously developed, but the unmanned aerial vehicle image defogging is still an unsolved problem.

Images