ACCURATE EXTRACTION METHOD OF BOUNDARY LINE IN HIGH-RESOLUTION SAR AMPLITUDE IMAGES

摘要

PURPOSE: A boundary line precision sampling method is provided to precisely extract a boundary line which has respectively different index properties in SAR(Synthetic Aperture Radar) amplitude image. CONSTITUTION: An SAR amplitude image in an image space is transformed into a hough area through an SAR edge detection hough transformation(S10-S13). The boundary point is searched and the boundary line extracted by using variation rate of adjacent pixels in the transformed hough area(S14). Using the average intensity of the brightness value of brightness value and scattering body of the mixed pixels within the extracted boundary line, the precise boundary line is extracted(S15). [Reference numerals] (AA) Start; (BB) End; (S10) Inputting an SAR amplitude image; (S11) Performing SEDHT; (S12) Calculating a change rate with a peripheral value; (S13) Extracting a boundary point; (S14) Converting the boundary point to a boundary line; (S15) Calculating a precise boundary line