Infrared target detection method based on local contrast

The invention discloses an infrared target detection method based on local contrast, which comprises the following steps of: establishing a window model by taking a current pixel as a central point, averagely dividing the window model into 3 * 3 sub-regions, taking the sub-region positioned in the center as a target region, and taking other sub-regions except the target region as background regions; obtaining local contrast values in different directions in the window model according to the average gray difference value of the target area and each background area; gray diffusion values in different directions are obtained according to the local contrast values in different directions; taking the minimum value in the gray diffusion values in different directions as an enhancement value; obtaining an enhanced gray value of the pixel point according to the enhancement value; the gray values of all the pixel points after enhancement are obtained, and an enhanced image is generated; and performing infrared target