Color type discrimination device for original

Abstract

Abstract PURPOSE:To discriminate the type of an original by a read data by discriminating a color picture element or a white/black picture element and discriminating the color original depending on the appearance frequency and the appearance number of the picture element discriminated to be the color picture element. CONSTITUTION:When the quantity of signal differs from each color signal calculated by difference arithmetic circuits 1-3, a pulse output is introduced from a logic gate 7 and its picture element is regarded to be a color picture element. When a prescribed number of the color picture elements is consecutive, the presence of a color block is detected by a block number counter 10 and a comparator 11 and when a prescribed number of color blocks or over is detected by a comparator 12, the line is discriminated to be a color line. Moreover, when a reference number of color lines is detected by a color line number counter 14 and a comparator 15, the original is discriminated to be a color original. Thus, the color type discrimination of the original is attained by a read data in real time.

Inventors

• 👤 Katsumi Nagata
• 👤 勝己 永田

Bibliographic Details