Endoscope image enhancement method, device, equipment and medium

The invention discloses an endoscope image enhancement method and device, equipment and a medium, and relates to the technical field of endoscopes, and the method comprises the steps: carrying out the guided filtering of an original image returned by an endoscope, so as to obtain an original basic layer image of the original image, and carrying out the image subtraction of the original image and the original basic layer image, so as to obtain an original basic layer image; obtaining an original detail layer image of the original image; performing non-local mean filtering on the original detail layer image to obtain a filtered detail layer image, and performing gain control on the filtered detail layer image to obtain a target detail layer image; processing the original base layer image by using a contrast-limited adaptive histogram equalization algorithm, an illumination non-uniformity correction algorithm and a linear weighted fusion algorithm to obtain a target base layer image; and carrying out image fusio