Image processing apparatus, electronic device, image processing method, and storage medium storing image processing program

A computer-readable storage device storing an image processing program for causing a computer to execute registration processing between a plurality of images through a motion vector calculation, the image processing program causing the computer to perform functions comprising:

• setting a plurality of motion vector measurement regions for determining motion vectors on an image;
• calculating a motion vector in each of the plurality of motion vector measurement regions;
• specifying a region of interest by user interest on the image;
• determining whether or not central coordinates of each of the plurality of motion vector measurement regions are included within boundaries of the region of interest on the image;
• calculating a contribution of each motion vector such that the contribution of the motion vector of a motion vector measurement region whose central coordinates are included within the boundaries of the region of interest on the image is larger than the contribution of the motion vector of a motion vector measurement region whose central coordinates are not included within the boundaries of the region of interest on the image;
• calculating a reliability value indicating a reliability of the motion vector calculated in each of the plurality of motion vector measurement regions such that when the reliability of the motion vector of a motion vector measurement region is less than a predetermined threshold, the reliability value of the motion vector of the motion vector measurement region is set to zero;
• and
• determining an inter-image motion vector by integrating the motion vectors calculated respectively in the plurality of motion vector measurement regions in accordance with the calculated contributions and the calculated reliability values.

An image processing method for performing image registration processing between a plurality of images through a motion vector calculation, comprising:

• setting a plurality of motion vector measurement regions for determining motion vectors on an image;
• calculating a motion vector in each of the plurality of motion vector measurement regions;
• specifying a region of interest by user interest on the image;
• determining whether or not central coordinates of each of the plurality of motion vector measurement regions are included within boundaries of the region of interest on the image;
• calculating a contribution of each motion vector such that the contribution of the motion vector of a motion vector measurement region whose central coordinates are included within the boundaries of the region of interest on the image is larger than the contribution of the motion vector of a motion vector measurement region whose central coordinates are not included within the boundaries of the region of interest on the image;
• calculating a reliability value indicating a reliability of the motion vector calculated in each of the plurality of motion vector measurement regions such that when the reliability of the motion vector of a motion vector measurement region is less than a predetermined threshold, the reliability value of the motion vector of the motion vector measurement region is set to zero;
• and
• determining an inter-image motion vector by integrating the motion vectors calculated respectively in the plurality of motion vector measurement regions in accordance with the calculated contributions and the calculated reliability values.