Processing method of color picture information

TL;DR: In this paper, a color shift and ghost elimination method was proposed by using the count number of picture elements in the same color among picture elements around the target picture element and information obtained by prescribed logical operation, with respect to pieces of picture information binary-encoded after color separation.

Abstract: PURPOSE:To eliminate a color shift and ghost by determining color information on a target picture element by using data regarding the count number of picture elements in the same color among picture elements around the target picture element and information obtained by prescribed logical operation, with respect to pieces of picture information binary-encoded after color separation. CONSTITUTION:For example, picture signals read via both filters 2R and 2C for for red and cyan are processed by binary-coding circuits 8R and 8C to obtain color picture signals Rin and Cin, which are passed through prescribed logic circuit 9 to obtain Rout and Bout. Further, they are processed by shift registers SHR1 and SHB1, and SHR4 and SHB4, and picture-element counters 11B and 11R to count the numbers of picture elements, equal in color, among picture elements around a target picture element in main and subscanning directions respectively. Then, those data and the pieces of color picture information Rout and Bout obtained as mentioned above are applied to comparing and discriminating circuit 12, which makes comparisons with prescribed numbers to determine the pieces of target picture information Rfout and Bfout lastly. Thus, a color shift, especially ghost are easily eliminated.