Infrared contrast enhancement method based on local optimum

The invention discloses an infrared contrast enhancement method based on local optimum, and belongs to the technical field of image processing. The problems of poor local contrast information, local information loss and global brightness relation distortion in the existing high-dynamic infrared image processing technology are solved. According to the method, the original high-dynamic image is partitioned, and the local contrast of the image is enhanced by adopting optimal local contrast pulling; gaussian smoothing is carried out on parameters between blocks to suppress a blocking effect; taking the image with the compressed global contrast as a local brightness guide image to obtain a background layer compressed image with the lifted local contrast; and adding the background layer compressed image and the detail layer image again according to a linear proportion to obtain a final image. And keeping the brightness relation of the original image. The method is suitable for the field of image processing, local c