Edge detection method and device based on infrared image

• Main Authors: WANG RUJUN, LI XINGHUA, GUO LELE, ZHANG SHENGZHU, YU LIJIAN, DUO YINGQUAN, CHEN XIUMEI, WANG YUANYUAN
• Format: Patent
• Language: Chinese; English
• Published: 04.03.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention relates to the technical field of image processing, in particular to an edge detection method and device based on an infrared image, and the method comprises the steps: converting a collected infrared image into a grayscale image; carrying out mean filtering on the converted grayscale image; carrying out image enhancement by adopting gray linear transformation; determining an appropriate segmentation point a and an appropriate segmentation point b of the original image; compressing the total gray scale number; calculating a gradient amplitude based on a 2 * 2 neighborhood; calculating a gradient amplitude based on a 3 * 3 neighborhood; weighting the gradient amplitude calculated by the 2 * 2 neighborhood and the gradient amplitude calculated by the 3 * 3 neighborhood to obtain a gradient amplitude mean value; determining a threshold range; performing preliminary edge detection based on the high-threshold point; and carrying out refined edge detection based on the low threshold point. According t