G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 3/14 (2006.01) G09G 3/20 (2006.01) G09G 3/28 (2006.01)
Patent
CA 2163155
In an error variance processing unit to get a false half tone diffusing in the surroundings the luminance error between the original picture element signal quantizedly input and the preceding data, one dot of said signal is converted into plural picture elements. The respective picture elements (pixels) thus converted are compared with the prior data to detect the luminance error, which will then be weighted by multiplying it with certain coefficient to give, for instance, the reproduced error in one line past, that in one dot past and further the reproduced error a in one-line and one-dot past, which will respectively be added to the original pixels. Producing a false tone by error variance in unit of pixel enables to display the half tone without expanding the half tone display area beyond required dot number.
Denda Hayato
Kobayashi Masayuki
Kosakai Asao
Matsunaga Seiji
Nakajima Masamichi
Canon Kabushiki Kaisha
Fujitsu General Limited
Gowling Lafleur Henderson Llp
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