COLOR DOT AREA DECISION DEVICE

摘要

PURPOSE: To decide accurately a dot area by reading binarized image data obliquely at a prescribed angle over lines so as to read dots accurately. CONSTITUTION: A pre-processing section 22 of a dot area decision section 21 applies processing such as smoothing, edge emphasis and binarization to color image data from a line memory. A data retrieval section 23 reads obliquely the binary data over lines at an angle depending on a color of dots and detects white black pair width based on the picture element of the noted picture element and the surrounding picture elements and retrieves a white area width and a black area width. A dot discrimination section 24 makes a synthetic judgement on whether or not the noted picture element is a picture element of a dot area based on the retrieval result.