Method for recognizing SAR target based on curvelet transform

• Main Authors: LIU ZHUO, ZHAO HONG, ZHOU WEIDA, JIAO LICHENG, HOU BIAO, LIU FANG, YANG SHUYUAN, WANG SHUANG, ZHANG LI
• Format: Patent
• Language: Chinese; English
• Published: 04.11.2009
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; 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 recognizing an SAR target based on curvelet transform, and relates to the technical field of image processing and target recognition. The invention mainly solves the problems of low recognition rate and large volume of data existing in the prior method for recognizing the SAR target. The implementation process comprises the followings steps of: smoothing median filtering; performing nonlinear normalization; performing threshold segmentation after window filtering; extracting low-frequency subband information and the threshold segmentation by the curvelet transform; forming a fine characteristic area by morphological treatment; orderly performing the smooth filtering, the nonlinear normalization, the window filtering and the extraction of the low-frequency subband information of an image by the curvelet transform to form a rough characteristic area; combining the fine characteristic and the rough characteristic as a final target characteristic vector to train and support a