Method and device for calculating temperature difference between target and background, and method and system for evaluating temperature difference between target and background

The invention provides a method for calculating a temperature difference between a target and a background in camouflage evaluation. The method comprises the following steps: acquiring a binary image of an image to be detected and a binary image of the target; determining a target area and a background area in the binary image of the to-be-detected image according to the binary image of the target and feature comparison; obtaining the temperature of each pixel point in the target area and the temperature of each pixel point in the background area; the temperature difference between the target and the background of the image to be measured is calculated according to the following formula. Correspondingly, the invention further provides a calculation device, a camouflage evaluation method and a camouflage evaluation system. The calculation method can improve the calculation precision of the temperature difference between the target and the background, thereby improving the precision of a test result in camoufla