G - Physics – 06 – T
Patent
G - Physics
06
T
G06T 3/00 (2006.01) G06F 15/72 (1990.01)
Patent
CA 2070732
PATENT 3698 C1 ABSTRACT OF THE DISCLOSURE A method, system and apparatus is disclosed that performs separable, two-pass image transformations onto folded curved surfaces An image special effects system has an image processing system to receive an input image signal representing an image to be folded and to provide a folded output image signal. A key processing system receives an input key signal to define a portion of the image selected for viewing. It operates in parallel with the image processing system to generate an output key signal which has undergone the same selected spatial transformation relative to the input key signal as did the image. A spatial transformation system operates on the input image signal so as to be able to spatially transform the input image signal on a folded curved surface. The spatial transformation system can be arranged as a separable, two pass transformation process and functions either with h-pass first operations, followed by v-pass operations or with v-pass first operations, followed by h-pass operations. A proportional switcher has two image signal inputs as well as key signal inputs. The proportional switcher generates an output image signal as a combination of image signals received at its image signal inputs in proportion to the key signals. The transformation processing system (a) receives a second image signal and an input key signal defining a region of the second image signal to be included in the output image signal; (b) performs a spatial transformation upon both the second image signal and the input key signal to produce a spatially transformed second image signal and a spatially transformed key signal; (c) provides the transformed second image signal and the transformed key signal to respective inputs of the switcher; and (d) spatially transforms the second image signal by folding the image over itself. The image transformation system separably processes each coordinate direction, for example, it can process the transformation of a horizontal coordinate direction and a vertical coordinate direction, either direction being processed before theother direction. The image transformation system can operate on a signal representing the front view of an image and another signal representing the back view of the image by folding the image to create the special effect of curling an image page in such a manner that parts or all of either its front view and/or its back view become visible.
Ampex Corporation
Brown David E.
Macrae & Co.
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