发明名称 Image processing apparatus capable of obtaining multi-level data
摘要 An image processing apparatus includes an input unit for inputting data on an object pixel, a calculation unit for calculating an average density value of a predetermined area, and a quantization unit for converting the data on the object pixel into multi-level data on the basis of the average density value obtained by the calculation means.
申请公布号 US5121446(A) 申请公布日期 1992.06.09
申请号 US19910731380 申请日期 1991.07.16
申请人 CANON KABUSHIKI KAISHA 发明人 YAMADA, YASUHIRO;TANIOKA, HIROSHI
分类号 H04N1/40;H04N1/405 主分类号 H04N1/40
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