Image analysis – Image compression or coding – Pyramid – hierarchy – or tree structure
Patent
1995-02-28
1998-05-19
Razavi, Michael T.
Image analysis
Image compression or coding
Pyramid, hierarchy, or tree structure
382234, G06K 936
Patent
active
057547017
ABSTRACT:
An image signal and a series of coordinates representing a contour of region of the image signal are input. In the first step, the region contour is approximated by a polygonal shape. In the second step, bits at addresses in a bit map memory corresponding to pixels within the approximated polygonal shape are made on. In the third step, coordinates indicative of apexes of the approximated polygonal shape are coded as first series of codes. In the fourth step, only image signals which are indicated by the bit map memory as existing within the approximated polygonal shape are coded as a second series of codes. In the fifth step, the first and second series of codes obtained in the third and fourth steps are multiplexed and output.
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patent: 5150431 (1992-09-01), Yoshida et al.
patent: 5159645 (1992-10-01), Kumagai
U. Franke, et al., "Region Based Image Representation with Variable Reconstruction Quality", SPIE, vol. 1001, 1988, pp. 178-186.
M. Gilge, et al., "Coding of Arbitrarily Shaped Image Segments Based on a Generalized Orthogonal Transform," Image Communication, vol. 1, pp. 153-180.
Del Rosso Gerard
NEC Corporation
Razavi Michael T.
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