PURPOSE: To prevent the abused copy of an original only by operating a simple device to an original surface, and to detect an abuse preventing original picture which can set on all picture processors at a relatively low cost.
CONSTITUTION: When picture elements corresponding to the both sides of the diameter (d)0 of a circle in a main scanning direction are detected, and the presence of pictures at the intersected points of the circle separated from the center only by an Lmm pitch in a sub-scanning direction is detected, an assumption that the picture in a detected red color is circular is correct. And also, when the frecuency N of a picture element turning-on in an (amm) pitch in a (dmm) pitch in the circle is counted, and it is Coincided with a numeric value corresponding to specific picture data preliminarily stored in a buffer memory, the circular picture (note red mark or the like) in a specific color can be specified. And also, a circular picture constituted of plural concentric circles in which at least either of the thickness of the line of the circle, the interval of the lines of the circuit, and the diameter of the circuit is specified is printed on the original surface an original for the picture processor. And also, pattern information constituted of character or encoded information is printed on an outputted sheet, so that the abuse can be prevented.
TSUJI MASATO
SEKI MASAO
SUWAI REN
AIKAWA KOJI
SHINOHARA KOICHIRO
NAKAYA FUMIO
| JPH02223498A | 1990-09-05 | |||
| JPH02210591A | 1990-08-21 | |||
| JPS60229572A | 1985-11-14 | |||
| JPH04294682A | 1992-10-19 |
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