Image processing apparatus, image processing method, and program

An image processing method comprising:

• an image reading step of reading a target printed matter to acquire first read image data indicating a read image of the target printed matter;
• an image matching step of performing a process of matching a positional relationship between read image data which is the first read image data or second read image data obtained by color conversion of the first read image data and original document image data of the target printed matter;
• a statistical processing step of generating statistical information that reflects a distribution of read image signal values of the read image data in each image region of the read image data corresponding to an image region having the same original document image signal values in the original document image data;
• and
• a mismatching detection step of detecting color mismatching between the original document image data and the target printed matter on the basis of the statistical information.

A non-transitory computer recording medium storing a program that causes a computer to realize:

• a function of acquiring, using an image reading unit that reads a target printed matter, first read image data indicating a read image of the target printed matter;
• an image matching function of performing a process of matching a positional relationship between read image data which is the first read image data or second read image data obtained by color conversion of the first read image data and original document image data of the target printed matter;
• a statistical processing function of generating statistical information that reflects a distribution of read image signal values of the read image data in each image region of the read image data corresponding to an image region having the same original document image signal values in the original document image data;
• and
• a mismatching detection function of detecting color mismatching between the original document image data and the target printed matter on the basis of the statistical information.