Image processing apparatus and method for controlling the same

A method for controlling an image processing apparatus comprising:

• controlling a printing apparatus to print, on a sheet, an image stored in a memory so that the image is printed on the sheet with a density lower than a predetermined density value;
• acquiring a read image obtained by reading the sheet on which the printed image is printed and information is added;
• specifying an area that corresponds to a difference of a plurality of color components greater than a predetermined threshold, as an information area corresponding to the information added to the sheet;
• and
• combining an image of the information area specified in the read image and the image stored in the memory.

One or more non-transitory computer-readable media comprising instructions that, when executed by one or more computers, cause the computers to perform operations comprising:

• controlling printing, on a sheet, of an image stored in a memory so that the image is printed on the sheet with a density lower than a predetermined density value;
• acquiring a read image by reading the sheet on which the image is printed and information is added;
• specifying an area that corresponds to a difference of a plurality of color components greater than a predetermined threshold, as an information area corresponding to the information added to the sheet;
• and
• combining an image of the information area specified in the read image and the image stored in the memory.