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Title: Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening

Abstract

An image represented in a first image array of pixels is first decimated in two dimensions before being compressed by a predefined compression algorithm such as JPEG. Another possible predefined compression algorithm can involve a wavelet technique. The compressed, reduced image is then transmitted over the limited bandwidth transmission medium, and the transmitted image is decompressed using an algorithm which is an inverse of the predefined compression algorithm (such as reverse JPEG). The decompressed, reduced image is then interpolated back to its original array size. Edges (contours) in the image are then sharpened to enhance the perceptual quality of the reconstructed image. Specific sharpening techniques are described. 22 figs.

Inventors:
;
Issue Date:
Research Org.:
University of California
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
563695
Patent Number(s):
5,703,965
Application Number:
PAN: 8-486,172
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 990200; PA: EDB-98:016735; SN: 98001896290
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 30 Dec 1997
Country of Publication:
United States
Language:
English
Subject:
99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; IMAGE PROCESSING; ALGORITHMS; DATA TRANSMISSION; IMAGES; TRANSFORMATIONS

Citation Formats

Fu, C.Y., and Petrich, L.I. Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening. United States: N. p., 1997. Web.
Fu, C.Y., & Petrich, L.I. Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening. United States.
Fu, C.Y., and Petrich, L.I. Tue . "Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening". United States.
@article{osti_563695,
title = {Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening},
author = {Fu, C.Y. and Petrich, L.I.},
abstractNote = {An image represented in a first image array of pixels is first decimated in two dimensions before being compressed by a predefined compression algorithm such as JPEG. Another possible predefined compression algorithm can involve a wavelet technique. The compressed, reduced image is then transmitted over the limited bandwidth transmission medium, and the transmitted image is decompressed using an algorithm which is an inverse of the predefined compression algorithm (such as reverse JPEG). The decompressed, reduced image is then interpolated back to its original array size. Edges (contours) in the image are then sharpened to enhance the perceptual quality of the reconstructed image. Specific sharpening techniques are described. 22 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {12}
}