| 摘要 |
PROBLEM TO BE SOLVED: To discriminate a printing image from an original image in the case of composting the original image and the printing image and printing out the composited image on a recording paper. SOLUTION: A timing control part 18 changes the magnification of a printing image by writing/reading out data in/from FIFO memories 17a, 17b based on specified magnification which is set up in a variable magnification control part 20 and a density conversion part 21 converts the density of the printing image, read out from the FIFO memory 17a or 17b. The density conversion step of the printing image is selected according to the result of the density conversion part 21 or the specified magnification to convert the density of the printing image. |
