| 摘要 |
PROBLEM TO BE SOLVED: To shorten a calculating time of the color of a gradation drawing area while avoiding a remarkable deterioration of the image quality of an image to be outputted and also to educe the use quantity of memories. SOLUTION: A data analyzing part 310 decides whether gradation drawing that draws an area obtained by surrounding analyzed data with two or three points while changing colors is instructed, an edge position calculating part 312 determines an interval for calculating the color of pixels in the gradation drawing area, and a gradation data preparing part 313 prepares data of gradation drawing according to a determined thinning level. |
