Image area separator

Abstract

Abstract PURPOSE:To effectively separate a dot area and line drawing area from each other even if a part where the areal ratio between white and black is nearly 1:1 exists in a dot photograph, by judging whether a picture element belongs to the dot photograph area or line drawing area depending upon that whether measured lengths are in an integral ratio or ratios near to an integral ratio. CONSTITUTION:This image area separating device is provided with a means (binary coding circuit) 11 which converts input picture signals into binary picture signals, means (paired run length counter) 12 which measures the length of continuation of a series of white and black picture elements of the binary picture signals, and means (area judging circuit) 13 which judges whether a noted picture element belongs to the dot photograph area or line drawing area depending upon whether the measured lengths are in an integral ratio or become values near to the integral ratio in the vicinity of the noted picture element, and outputs judged results to a terminal 102. When this device is used, separation of a dot area and line drawing area from each other can be performed effectively even to a part where the areal ratio between white and black is nearly 1:1.

Inventors

• 👤 Hironori Takashima
• 👤 洋典 高島

Bibliographic Details