Information processing apparatus, method, program, and imaging apparatus

An information processing method of processing images output from an image sensor of an imaging apparatus that captures images having a plurality of different characteristics by splitting a pupil, the information processing method comprising:

• a step of acquiring a first image that is captured by the imaging apparatus with respect to a first subject under a first imaging condition, that is output from the image sensor and that has a characteristics among the plurality of different characteristics;
• a step of acquiring a second image that is captured by the imaging apparatus with respect to the first subject under a second imaging condition different from the first imaging condition and that has the characteristic of the first image among the images output from the image sensor;
• and
• a step of detecting crosstalk included in the images based on a correlation between feature amounts of the first image and the second image,
• wherein the crosstalk is image components of different wavelengths included in the images,
• wherein a processor is configured to execute processing of each step.