H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 1/40 (2006.01) H04N 1/405 (2006.01)
Patent
CA 2215555
The present invention is directed to an image processing device that can process a halftone dot image without producing moire fringes therein. An image processing device according to the present invention comprises an image memory for storing multi-gradational image data, an area-deciding portion for deciding an area of pixels PIX (x, y) of a multi-gradational image stored in the memory and outputting decision signal SEL=0 when the pixel is a character-area pixel or SEL=1 when the pixel is a halftone area, a binarizing portion for binarizing a character image pixel PIX (x, y) of the multi-gradational image data stored in the memory and outputting a binarized image data L, a binarizing portion for binarizing a halftone image pixel PIX (x, y) of the multi- gradational image data stored in the memory and outputting a binarized image data P, an output selecting portion for selectably outputting binarized image data B which is a binarized image output L from the character-image data from the binarizing portion for character when the output SEL of the area-deciding portion is 1 or a binary image output P from the binarizing portion for photographic image when the output SEL is 0, and a memory for storing binarized image data outputted from the output selecting portion.
Takeda Yuuki
Yamada Hideaki
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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