IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD HAVE PRINT FUNCTION TO PREVENT SEE-THROUGH

摘要

Provided is an image forming apparatus that can keep the character of a concealing area secret certainly even if it makes low the printing rate of a see-through preventive image. A concealing area specifying part specifies the concealing area that includes a concealing character string in the print data. A character discriminating part discriminates character attribute of the concealing character string. A see-through preventive image generation part sets the see-through preventing area where shape and a size are the same as the concealing area. Also, see-through preventive image generation part generates a see-through preventive image where multiple characters having the character attribute discriminated by the character discriminating part are generated at random. A printing part prints the see-through preventive image in the position piled up by the same direction for the concealing area at the time of enclosure.

主权项

1. An image forming apparatus to print print data on a recording paper, comprising:
a concealing area specifying part that specifies a concealing area including a concealing character string in the print data; a character discriminating part that discriminates character attribute of the concealing character string; a see-through preventive image generation part that sets a see-through preventing area where shape and a size are same with the concealing area, generates multiple characters having the character attribute discriminated by the character discriminating part are at random, and generates a see-through preventive image respectively-arranging two or more generated characters at a random position in the see-through preventing area; and a printing part that generates print data for see-through preventing where the see-through preventive image is arranged at a position piled up by a same direction for the concealing area at the time of enclosure and prints on the recording paper.