Focus detection apparatus and method, method of controlling focus detection apparatus, and image capturing apparatus

摘要

A focus detection apparatus comprises: an image sensing unit including photoelectric conversion elements for each microlens, with the microlenses being two-dimensionally arranged; a generation unit configured to generate a first signal pair having a first resolution from signals of a first area of the image sensing unit which corresponds to a predetermined focus detection area and generate a second signal pair having a second resolution lower than the first resolution from signals of a second area which corresponds to the predetermined focus detection area and is wider than the first area; a focus detection unit configured to perform phase difference focus detection processing based on at least one of the first and second signal pairs; and a recording image generation unit configured to generate a recording image from a signal output from the image sensing unit.

主权项

1. A focus detection apparatus comprising:
an image sensor including a plurality of photoelectric conversion elements which form a pair of signals having parallax; a CPU controlling a focus detection using the pair of signals; and a memory holding a program which makes the CPU and a circuit function as: a generation unit configured to generate a first signal pair of a first resolution by using signals formed by the plurality of photoelectric conversion elements included in a first area which corresponds to a predetermined focus detection area and generate a second signal pair of a second resolution lower than the first resolution by combining signals formed by the plurality of photoelectric conversion elements included in a second area which corresponds to the predetermined focus detection area and is wider than the first area; a focus detection unit configured to perform focus detection processing based on at least one of the first signal pair and the second signal pair which are generated by the generation unit; and a recording image generation unit configured to generate a recording image by using a signal output from the image sensor.