Dike, Bronstein, Roberts & Cushman, LLP
Image processing device
 The present invention is directed to an image processing device that can process a halftone dot image without producing moire 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 character 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 photographic image 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. 
Sharp Kabushiki Kaisha
H
H04N
inventional
Yuuki Hideaki
Takeda Yamada