Image processing method, image processing apparatus, image processing program and program recording medium

Abstract

The present invention provides an image processing method which can search, at high speed, for image coordinates of a pixel corresponding to a position whose three-dimensional position is known, with respect to a line sensor image in which a surface of an object (i.e. the earth) is continuously taken by a line sensor mounted on a flight vehicle. The method includes calculating coordinates transformation information that is transformation information from an image coordinates system to a three-dimensional reference coordinates system for each line of a line sensor image, searching for a line where a distance between a line sensor view for each line that is calculated using flight vehicle three-dimensional coordinates position/speed information and the coordinates transformation information for each line of a line sensor image and a point whose three-dimensional position is known is smallest as the most suitable line corresponding to the point whose three-dimensional position is known on a three-dimensional coordinates, and determining a pixel where a distance between a straight line calculated by using flight vehicle three-dimensional coordinates position/speed information and the coordinates transformation information for each line with respect to each pixel on a line that is searched for as the most suitable line and the point whose three-dimensional position is known is smallest as image coordinates of a pixel on the line sensor image corresponding to the point whose three-dimensional position is known.