METHOD FOR LINE EXTRACTION OF HIGH RESOLUTION SATELLITE IMAGES USING REGULAR GRID-BASED HOUGH TRANSFORM

摘要

The present invention relates to a method for extracting a line of a high resolution satellite image by using regular grid-based hough transform which can extract a line without missing edge information of an original image by applying the regular grid-based hough transform method enabling effective calculation. The method for extracting a line of a high resolution satellite image by using regular grid-based hough transform comprises: an image obtaining step (S110) of obtaining an image of a target region to extract a line from a satellite; a regular grid generation step (S121) of generating a regular grid formed by the number of pixels which is determined in each of a horizontal direction and a vertical direction in the image; an edge extraction step (S122) of extracting edge information from the image; a regular grid-based labeling step (S130) of assigning a unique label value to edge according to the position of the regular grid including the edge extracted from the image; a hough transform step (S140) of extracting a line by performing hough transform on an edge having the same label value; and a line connection step (S150) of connecting lines by comparing lines of a neighboring regular grid with co-linearity.