Large-breadth digital aerial surveying camera image splicing method based on DLT (Direct Linear Transformation) coefficients

• Main Authors: DING XIAOBO, ZHU XIANGE, QI YANQING, LI YINGCHENG, LIU XIAOLONG
• Format: Patent
• Language: Chinese; English
• Published: 23.10.2013
• Subjects: GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING

The invention discloses a large-breadth digital aerial surveying camera image splicing method based on DLT (Direct Linear Transformation) coefficients. The method is mainly used for splicing sub-images of a large-breadth digital aerial surveying camera into a virtual image and comprises the following steps: exposing at the same moment to obtain four sub-images; carrying out connection point matching on the four sub-images in a cross-shaped overlapping region; calculating to obtain an outer orientation element of each sub-image according to connection points among the sub-images and an initial platform checking parameter of each sub-image; determining a relative position relation of four cameras according to the outer orientation elements of the four sub-images which are exposed at the same moment; calculating a DLT platform checking parameter according to the relative position relation; generating a spliced virtual image by the sub-images according to the DLT platform checking parameter. According to the larg