System and method for improving compressed image appearance using stochastic resonance and energy replacement
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United States of America Patent
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Oct 21, 2003
Grant Date -
N/A
app pub date -
Feb 4, 2000
filing date -
Feb 4, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for improving the image quality of a compressed image is provided. The improvement relates to the addition of certain error components resulting a less 'clean' image, also referred to as the 'film look'. The system and method perform a subband transforms on one or more images, wherein the image is split into one or more high frequency or low and DC frequency components. Responsive to a component containing DC frequencies, the data in that component is linearized. The linearized data in that component is then dequantified. Preferably, linearizing the data includes adding a function that has a probability and magnitude distribution similar to quantification error of the data. Furthermore, linearizing the data may include using a function that is exactly reproducible and generates random values that closely model the quantification error distribution.
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