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31 July 2002 Line triangulation for image registration
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Georegistration of an image typically requires either 3-5 control points measured in the target image or 6-10 tie points to at least two georegistered reference images. Often control points are not available, and tie points are difficult to find across sensor types, particularly for automatic processes. This work shows that registration can be achieved by measuring 3-5 lines in a target image and two reference images. The same ultimate registration accuracy can be achieved with tie points alone, lines alone, or a combination of both. Line triangulation enables automatic cross-sensor georegistration since lines can be found reliably across sensor types. Lines are measured by indicating two or more image positions on corresponding lines in each image. There is no need to identify corresponding points between images. There is no need for a priori line information, but such information can be exploited. Initial estimates of the lines can be made from the image measurements and a priori sensor models. The evaluation of image registration accuracy is discussed. Examples of image registration with line triangulation are presented.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Charles R. Taylor "Line triangulation for image registration", Proc. SPIE 4729, Signal Processing, Sensor Fusion, and Target Recognition XI, (31 July 2002);

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