Image analysis – Image transformation or preprocessing – Changing the image coordinates
Patent
1996-04-25
1999-07-20
Johns, Andrew W.
Image analysis
Image transformation or preprocessing
Changing the image coordinates
382154, 382284, 348159, G06K 900, G06K 932, G06K 936, H04N 718
Patent
active
059265817
ABSTRACT:
In a method for generating a model of terrain, images of the terrain are generated at different angles. Matching points in the images are identified and from these matching points, the coefficients of a registration mapping equation are determined. A height term of the registration matching equation is corrected for scaling and shear into an elevation term in the coordinates of one of the images. The elevation is rotated into the coordinates of the ground plane of the terrain to provide a digital elevation model of the terrain. Interpolation is carried out through the digital elevation model to provide a three-dimensional model of the terrain. In a system for measuring the accuracy of a registration mapping equation, first and second images are generated from a digital elevation model. The registration mapping equation being tested is applied to the images to generate an estimated digital matching function which is compared with the actual registration matching function for the two images.
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Johns Andrew W.
Lockheed Martin Corporation
Mariam Daniel G.
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