Optimizing and haze removing processing method for images photographed by unmanned aerial vehicles

Abstract

The invention provides an optimizing and haze removing processing method for images photographed by unmanned aerial vehicles. The optimizing and haze removing processing method has the advantages thatalgorithm speed optimizing schemes are proposed on the basis of dark channel prior haze removing processing algorithms for characteristics of high data volumes and large image dimension quantities ofthe images aerially photographed by the unmanned aerial vehicles, and processes for reducing the data volumes by means of image down-sampling and dark channel filtering with the time complexity O(1)of algorithms are proposed; the fact that atmospheric transmittance map layers can be refined by means of median filtering instead of guide filtering for conditions of uniform cloud and haze in the images is discovered, and accordingly the computation time can be shortened; the speeds are optimized, and accordingly the algorithms can effectively adapt to the characteristic of high data volumes ofthe images photographed by the unmanned aerial vehicles; contract stretching is carried out on the transmittance map layers for the images with uneven cloud and haze in haze removing procedures for high requirements on the quality of the images photographed by the unmanned aerial vehicles; enhancement processing is carried out on images which are already subjected to haze removing processing, thequality is optimized, and accordingly the quality of images outputted by the aid of haze removing processing algorithms for the images photographed by the unmanned aerial vehicles can be effectively improved.

Description

technical field [0001] The invention relates to a method for defogging processing of unmanned aerial vehicle images, in particular to an optimized defogging processing method for images captured by unmanned aerial vehicles, and belongs to the technical field of unmanned aerial vehicle image processing. Background technique [0002] UAV is a kind of unmanned aircraft, which is mainly controlled by its own program control device or radio remote control. In the 1940s, drones appeared for the first time. In World War II, drones were mainly used for military purposes. In the 1990s, many countries fully realized the characteristics of drones, such as simple structure and low cost of use. Or it can play a greater role in the military, and then set off a climax of using high-tech research and development to unmanned aerial vehicles. Now with the continuous emergence of new materials and new airfoils, the life cycle of unmanned aerial vehicles has greatly increased. UAVs can use adv...

AI Technical Summary

Problems solved by technology

Aiming at the two problems of reducing the amount of data and optimizing the time complexity of the algorithm, a method of image downsampling to reduce the amount of data and a dark channel filter with an algorithm time complexity of O(1) are proposed; and it is found that for the case of uniform clouds and fog in the image, Atmospheric transmittance layers are refined using median filtering instead of guided filtering, reducing computation time

Images