H - Electricity – 04 – N
Patent
H - Electricity
04
N
354/72
H04N 1/40 (2006.01)
Patent
CA 1315885
IMAGE PROCESSING SYSTEM ABSTRACT OF THE DISCLOSURE An image processing system for obtaining a binary signal from a multi-level signal read by an image scanner from an original document including mixed characters, ruled lines, and photos, and then obtaining a reproduced image from the binary signal, the image processing system including: a fixed slice processing unit for receiving said multi-level signal, and for slicing the multi-level signal by a predetermined fixed threshold level, and outputting the binary signal sliced by the fixed threshold level; a half-tone processing unit for receiving the multi-level signal, and for slicing the multi-level signal by a plurality of thres- hold levels defined by a dither method, and outputting the binary signal sliced by the plural threshold levels defined by the dither method; a character/photo separating unit for receiving the multi-level signal; and for detecting a pattern of the multi-level signal, separating either a character portion or photo portion based on the pattern, and outputting a selection signal; a selection unit for selecting either the fixed slice processing unit or the half-tone processing unit based on the selection signal from the character/photo separating unit.
603810
Kanemitsu Norio
Tabata Yoshio
Wakabayashi Masaru
Mcfadden Fincham
Pfu Limited
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