| 摘要 |
PURPOSE:To reduce the labor required for inspection of a printing pattern by forming a master pattern data from any one of a block copy, an original film formed based on the block copy and a pattern scanning data obtained by scanning the original film. CONSTITUTION:Negative films 7-10 of individual colors obtained based on a block copy are photographed by a visual unit 12 for original one by one, thereby to obtain data of an original of a voltage level corresponding to density data at negative films 7-10. The data of the original is written in a master memory 26 as a master pattern data via an AGC 21, an amplifier 22, an A/D converter 23, a master pattern extracting circuit 24 and a master pattern enlarging/ processing circuit 25. On the other hand, a printed surface of a printed matter immediately after printing is photographed by a visual unit 13 for detection under the conditions equivalent to those at the photographing time by the visual unit 12, and compared at a pattern comparing circuit 27 through an AGC 28, an amplifier 29, an A/D converter 30 and an extracting circuit 31 extracting a master pattern of the printed matter with the synchronously-input master pattern data. |
