Satellite-image image-ground coordinate simulation method based on combination of forward and reverse directions

• Main Authors: WANG JIANRONG, LIU WEI, HUANG YAN, YANG XIUCE, MIAO YUZHE, ZHOU YU
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2017
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention discloses a satellite-image image-ground coordinate simulation method based on combination of forward and reverse directions. By using an existing satellite-image image-ground coordinate simulation method, practicality is poor because of restriction of a data source. By using the method of the invention the above technical problem is solved. The method is characterized by establishing a scanning coordinate system, generating foresight and back-sight image point coordinates, and according to a sampling frequency of an image during photographing, calculating an external orientation element at a photographing moment; converting an image point coordinate taking a pixel as a unit into a coordinate in an image plane coordinate system, and then using a forward intersection formula to calculate a ground point coordinate; according to the calculated ground point coordinate and internal and external orientation elements, using a collinearity equation to calculate image point coordinates of foresight and b