The invention relates to a method for detecting a
region of interest, called ROI for short, from bottom to top based on combination of low-level image information and middle-level image information. The method for detecting the
region of interest comprises the steps that firstly, an
angular point is detected through the Harris operator, so that a convex
hull boundary is obtained, and a middle-level information
saliency map is calculated according to a convex
hull area and a superpixel clustering result; secondly, an image which is originally in the RGB space is converted into the CIELab space, and filtering is conducted on the image through a
Gaussian difference filter, so that a low-level information
saliency map is obtained; finally, weight fusion is conducted on the low-level image information and the middle-level image information so that a
saliency map of the image can be obtained. According to the method for detecting the
region of interest, through the combination of the middle-level image information calculated through superpixel clustering and the low-level image information calculated through
filtration of the difference filter, accurate positioning of the region of interest in the complicated
natural environment is achieved, and the edge of a detected object of interest is clear; meanwhile,
background noise can be effectively restrained, and the applicability is high.