| 摘要 |
PROBLEM TO BE SOLVED: To provide a chart set for correcting stripe unevenness capable of generating a correction table precisely and efficiently by forming an appropriate density image pattern corresponding to magnitude of supposed positional deviation or positional deviation amount to use it as an image for correction when occurrence of the positional deviation is supposed on the image for correction.SOLUTION: A density image pattern 14 for detecting positional deviation of an image occurring on the image has a plurality of unit rows arrayed at a first interval in a sub-scanning direction orthogonal to a main scanning direction. Each unit row has a size L1 corresponding to magnitude of the positional deviation of the image and has a plurality of units 12 arrayed at a second interval in the main scanning direction. The plurality of unit rows are composed of two unit rows adjacent to each other in the sub scanning direction, respectively, and have a plurality of unit groups having densities different from one another. The plurality of units 12 included in the respective unit groups have the same density. |
