Abstract
This paper describes the concept of “photo-variant” self-calibration, which offsets many shortcomings raised by “block-invariant” self-calibration. The photo-variant approach differs significantly in that it assigns an individual set of compensation parameters to each photograph or group of photographs (strip) rather than postulating a common set of parameters for all photographs in the block. Although this approach requires a more laborious computational effort, it is a generalized self-calibration scheme applicable for any type of camera (metric or non-metric) and photography (aerial or close-range). Mathematical formulations and associated computational considerations, especially the means of circumventing the problem of ill-conditioning, will be discussed in detail in this paper.
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