Image analysis – Image compression or coding – Including details of decompression
Patent
1998-05-20
1999-09-07
Rogers, Scott
Image analysis
Image compression or coding
Including details of decompression
382260, 382264, 382266, G06K 944, G06K 948, G06T 500, G06T 920
Patent
active
059499109
ABSTRACT:
A digitized image is encoded by detecting edges in the image, encoding the position and sharpness of the detected edges, smoothing and reducing the size of the digitized image, and encoding the resulting reduced image. A digitized image encoded in this way is reconstructed by generating a horizontal edge image and a vertical edge image, or a horizontal edge image, a vertical edge image, and a diagonal edge image, from the encoded edge position and sharpness information, smoothing each of these edge images by a series of filters to obtain a series of edge images, filtering each edge image in each series with an edge synthesis filter to synthesize a high-frequency image, decoding the reduced image, and performing an inverse wavelet transform on the decoded reduced image and the high-frequency images.
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P.J. Burt et al., "The Laplacian Pyramid as a Compact Image Code", IEEE Transaction on Communications, vol. No. 4. (Apr. 1983) pp. 532-540.
Stephane Mallet et al., "Compact Image Coding from Edges with Wavelets", ICASSP 91: 1991 International Conference on Acoustics, Speech and Signal Processing, Toronto, Ontario, Canada (May 14-17, 1991) pp. 2745-2748.
Frank Robert J.
OKI Electric Industry Co., Ltd.
Rogers Scott
Wood Allen
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