Unmanned aerial vehicle remote sensing surveying and mapping image enhancement processing method

Abstract

The invention discloses an unmanned aerial vehicle remote sensing surveying and mapping image enhancement processing method, and particularly relates to the technical field of unmanned aerial vehicle remote sensing surveying and mapping, the unmanned aerial vehicle remote sensing surveying and mapping image enhancement processing method comprises a low-pass filtering module, a high-pass filtering module and an image integration module, the low-pass filtering module is used for blocking or attenuating high-frequency signals that exceed the set threshold. the high-pass filtering module is used for blocking or weakening high-frequency signals lower than a set critical value, and the method comprises the following steps: step 1, performing equal interval division on a collected image, and dividing the image into a plurality of interval images; according to the scheme, the images are split, the images are enhanced one by one, then according to the content of the images, when low-pass filtering needs to be carried out on the images, the low-pass filtering module is used for carrying out low-pass filtering on the images, edges and noise are effectively removed, the middle part is clearer, similarly, high-pass filtering can be adopted for the images with the important edge images. According to the scheme, image enhancement can be carried out according to different situations, and the image enhancement effect is obvious.

Description

technical field [0001] The present invention relates to the technical field of UAV remote sensing surveying and mapping, and more specifically, the present invention relates to an image enhancement processing method of UAV remote sensing surveying and mapping. Background technique [0002] Remote sensing mapping, using various sensors on the ground, aviation, and aerospace platforms to draw topographic maps or other thematic maps of the earth or other stars. The images obtained by remote sensing mapping are mainly frame cameras and CCD cameras. Acquire heading or side-by-side overlapping stereo pairs along flight direction or different orbits to measure elevation of ground points and map topography. [0003] According to the patent No. CN 104318542 A disclosed by the patent network, an image enhancement processing algorithm, the invention divides the pixels of the image into several layers according to the brightness value, and implements noise classification and removal in ...

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Problems solved by technology

[0003] According to the patent No. CN 104318542 A disclosed by the patent network, an image enhancement processing algorithm, the invention divides the pixels of the image into several layers according to the brightness value, and performs noise classification and removal in each layer that maintains the same connectivity. Different algorithms are used to process each part of the original image, and the results are geometrically superimposed to obtain the final image, which solves the problem of excessive noise in dark parts and loss of details in bright parts when performing histogram equalization on grayscale images with uneven illumination and other issues; however, this solution is not enough to simply remove noise, and it will still cause the image to be unclear

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