Image forming apparatus, image forming method, and storage medium

An image forming method for an image forming apparatus that includes:

• an image former that forms an image on a recording medium;
• a reader that reads the image formed on the recording medium;
• a colorimeter that performs colorimetry of the image formed on the recording medium;
• and a hardware processor, the method comprising:
• based on image data of multiple color patches obtained from the reader, inspecting each of the color patches for an abnormality,
• based on the inspection result, determining whether the colorimeter can perform colorimetry of each of the color patches, and
• causing the image former to re-form only a color patch determined not to be subjected to colorimetry by the colorimeter.

A non-transitory computer-readable storage medium storing a program for a computer of an image forming apparatus that includes:

• an image former that forms an image on a recording medium;
• a reader that reads the image formed on the recording medium;
• and a colorimeter that performs colorimetry of the image formed on the recording medium, the program causing the computer to:
• inspect, based on image data of multiple color patches obtained from the reader, each of the color patches for an abnormality,
• determine, based on the inspection result, whether the colorimeter can perform colorimetry of each of the color patches, and
• cause the image former to re-form only a color patch determined not to be subjected to colorimetry by the colorimeter.