Image processing apparatus, method and storage medium, for object color evaluation

An image processing method comprising:

• illuminating a first object with a marker arranged therein with light emitted by a light source;
• capturing with a capturing condition an image of the first object with the marker arranged therein;
• acquiring first color information from the captured image of the first object;
• generating shape data representing a shape of the first object based on a portion of the captured image that corresponds to the marker;
• acquiring second color information from plural pieces of color information of a second object based on the shape data and the capturing condition;
• outputting, as an evaluation value of a color of the first object, a color difference between a color represented by the first color information and a color represented by the second color information.

A non-transitory computer-readable storage medium storing instructions that, when executed by a computer, cause the computer to perform an image processing method, the image processing method comprising:

• illuminating a first object with a marker arranged therein with light emitted by a light source;
• capturing with a capturing condition an image of the first object with the marker arranged therein;
• acquiring first color information from the captured image of the first object;
• generating shape data representing a shape of the first object based on a portion of the captured image that corresponds to the marker;
• acquiring second color information from plural pieces of color information of a second object based on the shape data and the capturing condition;
• outputting, as an evaluation value of a color of the first object, a color difference between a color represented by the first color information and a color represented by the second color information.