| 摘要 |
PROBLEM TO BE SOLVED: To improve recognition accuracy in unauthorized copy protection by correcting variation in dot diameters in printing out an unauthorized copy protection pattern. SOLUTION: An optical writing apparatus configured to superpose an unauthorized copy protection pattern on an output image and carry out optical writing on a photosensitive body with the use of a light emitting device array unit LPH is provided with; line memories storing every n line of output images, an image matrix generating part 501-32 generating an image matrix of n×n for the image data read from the line memories, and a pattern recognizing and output image generating part 501-33 carrying out recognition of an input image by each image matrix generated by the image matrix generating part 501-32 and correcting output image of the unauthorized copy protection pattern in pixel units for every prescribed region when the corresponding unauthorized copy protection pattern is recognized and controlling a size of an isolated dot included in the unauthorized copy protection pattern. COPYRIGHT: (C)2009,JPO&INPIT |
