Information processing apparatus, method, and programmed storage medium, for calculating ranges of regions of interest of scanned or other images

An image processing method comprising:

• acquiring two-dimensional image of an object;
• calculating, as an existence range, an intersection region between the two-dimensional image and a three-dimensional existence range composed of a corresponding region of a given region in a three-dimensional image of the object and an error range which is added to a circumference of the corresponding region;
• and
• causing a display unit to display, on the two-dimensional image, the existence range.

A non-transitory storage medium storing a program for causing a computer to execute an information processing method, the information processing method comprising:

• acquiring two-dimensional image of an object;
• calculating, as an existence range, an intersection region between the two-dimensional image and a three-dimensional existence range composed of a corresponding region of a given region in a three-dimensional image of the object and an error range which is added to a circumference of the corresponding region;
• and
• causing a display unit to display, on the two-dimensional image, the existence range.