04780761 is referenced by 76 patents and cites 8 patents.

A system for compressing and transmitting a digital image signal over a limited bandwidth communication channel, transform codes the image values and quantizes the transform coefficients according to a two-dimensional model of the sensitivity of the human visual system. The model of the human visual system is characterized by being less sensitive to diagonally oriented spatial frequencies than to horizontally or vertically oriented spatial frequencies, thereby achieving increased compression of the image.

Title
Digital image compression and transmission system visually weighted transform coefficients
Application Number
7/57413
Publication Number
4780761
Application Date
June 2, 1987
Publication Date
October 25, 1988
Inventor
Cheng Tie Chen
Rochester
NY, US
Majid Rabbani
Rochester
NY, US
Scott J Daly
W. Henrietta
NY, US
Agent
Thomas H Close
Assignee
Eastman Kodak Company
NY, US
IPC
H04N 7/133
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