Method for restraining speckles of polarized SAR data based on Bayes non-local mean value

• Main Authors: LI YUE, JIAO LICHENG, HOU BIAO, GOU SHUIPING, FENG HONGXIAO, SHEN WEI, ZHONG HUA, WANG SHUANG
• Format: Patent
• Language: Chinese; English
• Published: 20.06.2012
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CALCULATING; COMPUTING; COUNTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a method for restraining speckles of polarized SAR data based on a Bayes non-local mean value, solves the problem that the traditional polarized SAR filter technique cannot eliminate the speckle noise in a homogeny area very well, and overcomes the shortcoming that the traditional technique cannot maintain the edge detailed information. The method comprises the steps of: (1) inputting a coherence matrix T of the polarized SAR data, (2) maintaining bright targets in the coherence matrix T, (3) filtering the Bayes non-local mean value of each element of the coherence matrix T, wherein the filtering value used for filtering is acquired from SPAN filter operation, and (4) generating a fake color drawing from the filtered coherence matrix T through a Pauli vector methodin order to observe the filtering effect. Compared with the prior art, the method of the invention obviously increases the capability of restraining the speckle noise of the polarized SAR data, can efficiently smoothen the ho