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Unformatted text preview: CS 450: Introduction to Digital Signal and Image Processing Geometric Operations Geometric Operations Transformations (Shift, Rotation, etc.) Resizing Adding/Correcting a Warp Texture Mapping Morphing Example: Texture Mapping Mapping an image onto the surface of a geometric object Provides increased realism Example: Morphing Warp a pair of images based on corresponding points Combination of warp/crossdissolve Transformations It all starts with the transformation What do you want to go where? Kinds of transformations: Simple: Translation, Rotation, Scale (or combinations) Affine (6 parameter) Perspective (8 parameter) Arbitrary meshes B [ r ( x , y ), s ( x , y )] = A [ x , y ] AB Forward Mapping Let x = r(x,y) and y = s(x,y) be a mapping from location (x,y) to (x,y). Forward Mapping  Problems Doesnt always map to pixel locations Solution: spread out effect of each pixel AB AB ? Forward Mapping  Problems May produce holes in the output B...
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This note was uploaded on 03/02/2012 for the course C S 450 taught by Professor Morse,b during the Winter '08 term at BYU.
 Winter '08
 Morse,B

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