Patent ID: 8675257
Filing Date: 2014-03-18
Classification: G06K

Abstract:
1. A method for automatic trapping, comprising: (1) translating trapping objects into simple color blocks; (2) obtaining the trapping edge by scanning and obtaining the public boundaries of all the adjacent color blocks; (3) determining whether the color blocks around the trapping edge satisfy the trapping conditions or not; and if not, dropping those color blocks; (4) executing region analysis by setting a central color block and combining the relations with all the surrounding color blocks to conduct trapping edge connections; (5) generating trapping region shape, filling ink and subtracting ink for trapping region; wherein the determination in step 3) is based on ink dots percentage and color blocks luminance, said ink dots percentage being the average ink dots percentage within the region where the distance from the trapping edge is no more than a setting value D; wherein the setting value D is less than or equals to the trapping width; and wherein said trapping conditions consist of color trapping condition and pullback trapping condition.