G06T5/40- Image enhancement or restoration by the use of histogram techniques.based on properties of the image as a whole G06T5/00- Image enhancement or restoration.G06T- IMAGE DATA PROCESSING OR GENERATION, IN GENERAL.background level dependent on the contents of the original using histograms H04N1/4074- Control or modification of tonal gradation or of extreme levels, e.g.background level dependent on the contents of the original H04N1/4072- Control or modification of tonal gradation or of extreme levels, e.g.H04N1/407- Control or modification of tonal gradation or of extreme levels, e.g.H04N1/00- Scanning, transmission or reproduction of documents or the like, e.g.238000006467 substitution reaction Methods 0.000 description 1.238000006011 modification reaction Methods 0.000 description 2.238000006243 chemical reaction Methods 0.000 description 2.238000003199 nucleic acid amplification method Methods 0.000 description 3.239000003638 reducing agent Substances 0.000 claims description 27.Publication of WO2006006157A2 publication Critical patent/WO2006006157A2/en Publication of WO2006006157A3 publication Critical patent/WO2006006157A3/en Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority to US10/889,221 priority Critical patent/US20060077490A1/en Priority to US10/889,221 priority Application filed by Vlscom Ltd. Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents WO2006006157A2 - Automatic adaptive gamma correction WO2006006157A2 - Automatic adaptive gamma correction
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