Image processing apparatus, image capturing system, image processing method, and recording medium

An image processing method, comprising:

• obtaining a first image in a first projection, and a second image in a second projection;
• transforming projection of a first corresponding area of the first image that corresponds to the second image, from the first projection to the second projection, to generate a third image in the second projection;
• identifying a plurality of feature points, respectively, in the second image and the third image;
• determining a second corresponding area in the third image that corresponds to the second image, based on the plurality of feature points respectively identified in the second image and the third image;
• generating a reference shape in the second projection, having a relation of projection transformation with the second image;
• transforming projection of the reference shape, from the second projection to the first projection, to generate a reference shape in the first projection;
• calculating reference shape conversion data for converting the reference shape in the second projection to the second corresponding area, using data for transforming projection from the second image to the second corresponding area;
• and
• storing, in a memory, the reference shape conversion data in association with reference location data indicating the locations of a plurality of points of the reference shape in the first projection,
• the reference shape conversion data including at least one of reference shape rotation data defining rotation processing to be applied to the reference shape, and reference shape scaling data for defining scaling to be applied to the reference shape.

A non-transitory recording medium which, when executed by one or more processors, cause the processors to perform an image processing method comprising:

• obtaining a first image in a first projection, and a second image in a second projection;
• transforming projection of a first corresponding area of the first image that corresponds to the second image, from the first projection to the second projection, to generate a third image in the second projection;
• identifying a plurality of feature points, respectively, in the second image and the third image;
• determining a second corresponding area in the third image that corresponds to the second image, based on the plurality of feature points respectively identified in the second image and the third image;
• generating a reference shape in the second projection, having a relation of projection transformation with the second image;
• transforming projection of the reference shape, from the second projection to the first projection, to generate a reference shape in the first projection;
• calculating reference shape conversion data for converting the reference shape in the second projection to the second corresponding area, using data for transforming projection from the second image to the second corresponding area;
• and
• storing, in a memory, the reference shape conversion data in association with reference location data indicating the locations of a plurality of points of the reference shape in the first projection,
• the reference shape conversion data including at least one of reference shape rotation data defining rotation processing to be applied to the reference shape, and reference shape scaling data for defining scaling to be applied to the reference shape.