Image processing apparatus, image pickup apparatus, and storage medium for storing image processing program

An image pickup apparatus comprising:

• An image capturing unit configured to generate an input image through image pickup;
• and
• an image processing apparatus that includes:
• an image acquiring unit configured to acquire, based on an input image, a plurality of resolution hierarchical images having resolutions that are different from one another;
• an extracting unit configured to extract a feature point in each of the plurality of resolution hierarchical images;
• a determining unit configured to determine a correlation among a plurality of feature points in the plurality of resolution hierarchical images using information on positions of the plurality of feature points in each resolution hierarchical image;
• and
• a selecting unit configured to select at least one processing object image to be processed with the feature point in the plurality of resolution hierarchical images, based on a determination result of the correlation,
• wherein at least one processor or circuit is configured to perform a function of at least one of the units.

A non-transitory computer-readable storage medium configured to store an image processing program that instructs a computer:

• to acquire, based on an input image, a plurality of resolution hierarchical images having resolutions that are different from one another;
• to extract a feature point in each of the plurality of resolution hierarchical images;
• to determine a correlation among a plurality of feature points in the plurality of resolution hierarchical images using information on positions of the plurality of feature points in each resolution hierarchical image;
• and
• to select at least one processing object image to be processed with the feature point in the plurality of resolution hierarchical images, based on a determination result of the correlation.