Method and apparatus for on-the-fly image coding
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United States of America Patent
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Apr 27, 2004
Grant Date -
N/A
app pub date -
Oct 26, 2000
filing date -
Oct 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for on-the-fly coding digital images using a line scanner, a boundary matcher/follower and a coder, and utilizing a small amount of processing and memory is disclosed. In an on-the-fly digital image coding method and apparatus feature points determining boundaries of regions of adjacent pixels of similar characteristics in each successive scanning line are sequentially detected and efficiently encoded in a chain-link manner, based on information concerned with feature points detected on a preceding scanning line. By this method, additional improvement in compression can be achieved with the use of predictive coding based on spatial stochastic correlation between successive feature points associated with a continuous boundary line. The image coding method of the invention allows a significant reduction of quantity of information needed for image representation without deterioration of image quality and with no requirement of intermediate storing vast amounts of image data at the time of coding.
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