SAR image quantization and enhancement for vehicle target recognition

The gray scale data in SAR image samples containing vehicle targets and common image quantization and enhancement methods have been generally analyzed and a new SAR image quantization and enhancement method in the spatial domain based on point processing has been given, in which, image data quantization range is selected by using the statistical features in gray data of all image sets as parameters and gray scales of the probable target points with high scatting strength beyond the quantization range are set to the highest gray scale. Thereby not only the original statistics in images are retained but also the target information is enhanced. The method of optimal parameter selection is also given. The well-pleasing results for vehicle target recognition have been obtained.