Abstract: Texture mapping or video mapping is performed in such a way as to obtain perspectively correct images, while at the same time not requiring excessive computational overheads. Non-linear functions required to achieve perspectively correct images are stored in the form of look-up tables. Depth extents at the extremes of a locus of interpolation are compared and from this comparison a particular look-up table, or a pair of look-up tables, are selected. When a pair of look-up tables are selected, it is possible to linearly interpolate between the two, in order to obtain a closer approximation to the desired non-linear response.

Abstract: A device and a process for detecting the movement of a target observed in the field of view of an optical detector in which a differential image is determined from two successive pictures of the field of view, a binary image is formed from the differential image and from a binary conversion threshold, moving zones in the binary image are individualized, individual envelopes surrounding the zones are determined, an overall envelope surrounding the individual envelopes is determined, and it is determined whether there is movement of the target from the individual envelopes and the overall envelope.

Abstract: A pattern recognition system uses a Karhunen-Loeve expansion to separate unique characteristics from common characteristics. An approximation using a reduced number of series terms produces a correlation output with a dramatically reduced number of computations.