Geometrical Image Modification
نویسنده
چکیده
Image translation, size scaling and rotation can be analyzed from a unified standpoint. Let for and denote a discrete destination image that is created by geometrical modification of a discrete source image for and . In this derivation, the source and destination images may be different in size. Geometrical image transformations are usually based on a Cartesian coordinate system representation in which pixels are of unit dimension, and the origin is at the center of the upper left corner pixel of an image array. The relationships between the Cartesian coordinate representations and the discrete image array of the destination image are illustrated in Figure 13.1-1. The destination image array indices are related to their Cartesian coordinates by
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