A Back Projection Algorithm for Linear Array Imageries Based on the Constraints of Object-space Relation

doi:10.11947/j.AGCS.2017.20160622

Abstract

Abstract: Back projection is the key technology for rectification of linear array CCD imageries. On the basis of analyzing the imaging mode and characteristics of linear whiskbroom image, a back projection algorithm based on the constraints of object-space relation was proposed, aiming at the inefficiency of conventional image-based sequential or iterative search methods. The best scan-line of the adjacent point was used as a priori value, to estimate the number of the scan-lines between the adjacent point and the current point, thus locating the initial best scan-line. Then, a search window was constructed by the center of the initial best scan-line, and an accurate searching was implemented. At last, according to the orientation elements of the best scan-line, the coordinates back projection was carried out. The feasibility, accuracy and efficiency of the proposed method were verified by the experimental results of the airborne linear array whiskbroom simulated image data and the pushbroom real image data.

Key words: back projection, constraints of object-space relation, linear array whiskbroom, best scanline search

CLC Number:

P236

MO Delin, ZHANG Yongsheng, WANG Tao, YANG Guopeng, XIA Qin. A Back Projection Algorithm for Linear Array Imageries Based on the Constraints of Object-space Relation[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(5): 583-592.

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