Image analysis – Image compression or coding – Quantization
Reexamination Certificate
2005-07-21
2010-06-15
Chen, Wenpeng (Department: 2624)
Image analysis
Image compression or coding
Quantization
C358S003030, C358S003130
Reexamination Certificate
active
07738719
ABSTRACT:
For improving the grey scale portrayal, several dithering methods are used: Cell-based dithering, multi-mask dithering or error diffusion. Each of them has specific disadvantages. A simple combination of them does not bring expected advantages. However, an improvement is obtained if the result of the multi-mask dithering is used for controlling the error diffusion by a switch, for example.
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Weithbruch S., et al., “New Metacode Coding Concept For Improving PDP Gray-Scale Quality” Journal Of The Society For Information Display, Sah Jose, US vol. 11, No. 3 2003 pp. 485-491, XP002280890 issn: 1071-0922 *abstract* *paragraphs '0003!, '004!*.
EPO Search Report.
Correa Carlos
Thebault Cédric
Weitbruch Sébastien
Chen Wenpeng
Opalach Joseph J.
Park Soo Jin
Shedd Robert D.
Thomson Licensing
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