Patent ID: 8606129

Claim:
An image forming system including an image forming apparatus configured to form a mark for detecting at least one of a position deviation and a density deviation and obtain a correction amount by detecting the mark, the image forming system comprising: an identification unit configured to identify an image characteristic of an image to be printed according to at least one of a positional relationship between colors, a gradation distribution, and a resolution, and a selecting unit configured to select a choice from multiple choices containing at least two choices of: only position deviation; only density deviation; and both position deviation and density deviation, according to the image characteristic identified by the identification unit, wherein the image forming apparatus is configured to: form a mark for detecting the position deviation when the choice of only position deviation is selected by the selecting unit, form a mark for detecting the density deviation when the choice of only density deviation is selected by the selecting unit, and form both the mark for detecting the position deviation and the mark for detecting the density deviation when the choice of both position deviation and density deviation is selected by the selecting unit, wherein the positional relationship between colors is a relationship specified according to at least one of an overlap ratio between colors and an adjacency ratio between colors, and wherein when the adjacency ratio between colors identified by the identification unit is larger than a threshold value, the selecting unit selects a choice containing the position deviation.