Image speckle suppression method based on region and pixel coupling similarity measurement

• Main Authors: LI GUANGXIN, SHI XIAOFEI, CHEN FANGYUAN, DENG ZHIYU, NI KUIYUAN, ZHANG XINPENG, LYU MIAO, SHEN ZIYANG
• Format: Patent
• Language: Chinese; English
• Published: 10.09.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention provides an image speckle suppression method based on region and pixel coupling similarity measurement. The method comprises the steps of obtaining a single-polarized SAR image, and constructing a mean image and a standard deviation image of the SAR image; constructing a variation coefficient graph of the SAR image based on a 3 * 3 neighborhood window; constructing similarity measurement based on the mean image and the standard deviation image; constructing a gamma function attenuation coefficient according to the variation coefficient graph; adaptively selecting a similar block size based on the variation coefficient graph; calculating and weighting all similarity distances in a search window with a target point as the center according to similarity measurement, jointly constructing a weighted value in a non-local mean algorithm in combination with a gamma function attenuation coefficient, and then calculating an estimated value of the target point; and circularly calculating the weight of each