Image processing apparatus and method, and image capturing apparatus

An image capturing apparatus comprising:

• an image sensor;
• and
• an image processing apparatus that corrects an image using an image signal obtained by performing shooting by an image sensor which includes a plurality of photoelectric conversion portions that correspond to each of a plurality of microlenses and is configured to perform photoelectric conversion on a light flux that enters via an imaging optical system including an image stabilization optical system configured to correct a camera shake, comprising:
• a first obtaining unit that obtains the image signal and a driving state of the image stabilization optical system at a time of image shooting;
• a second obtaining unit that obtains correction values for correcting variation in defocus amounts due to shift of a focus plane at different image heights in the image sensor that occurred due to driving of the image stabilization optical system;
• and
• a refocus unit that performs refocusing on the basis of the obtained image signal and generates the image,
• wherein the refocus unit corrects the variation in defocus amounts by refocusing on the basis of the correction values.

An image processing method of correcting an image using an image signal obtained by performing shooting by an image sensor which includes a plurality of photoelectric conversion portions that correspond to each of a plurality of microlenses and is configured to perform photoelectric conversion on a light flux that enters via an imaging optical system including an image stabilization optical system configured to correct a camera shake, the method comprising:

• obtaining the image signal and a driving state of the image stabilization optical system at a time of image shooting;
• obtaining correction values for correcting variation in defocus amounts due to shift of a focus plane at different image heights in the image sensor that occurred due to driving of the image stabilization optical system;
• and
• performing refocusing on the basis of the obtained image signal and generates the image,
• wherein the variation in defocus amounts is corrected by the refocusing on the basis of the correction values.

A non-transitory readable storage medium having stored thereon a program which is executable by a computer, the program having a program code for causing the computer to function as each unit of an image processing apparatus that corrects an image using an image signal obtained by performing shooting by an image sensor which includes a plurality of photoelectric conversion portions that correspond to each of a plurality of microlenses and is configured to perform photoelectric conversion on a light flux that enters via an imaging optical system including an image stabilization optical system configured to correct a camera shake, the apparatus comprising:

• a first obtaining unit that obtains the image signal and a driving state of the image stabilization optical system at a time of image shooting;
• a second obtaining unit that obtains correction values for correcting variation in defocus amounts due to shift of a focus plane at different image heights in the image sensor that occurred due to driving of the image stabilization optical system;
• and
• a refocus unit that performs refocusing on the basis of the obtained image signal and generates the image,
• wherein the refocus unit corrects the variation in defocus amounts by refocusing on the basis of the correction values.