FOCUS DETECTION APPARATUS, FOCUS DETECTION METHOD AND PROGRAM, AND IMAGING APPARATUS

摘要

A focus detection apparatus for performing a focus detection on the basis of pixel data of an object obtained from an imaging unit having pupil dividing means of a photographing optical system, Sets a focus detection area divided into division areas and a plurality of different first areas for deciding a focus state in the focus detection area, arithmetically operates first correlation data from the pixel data with respect to the object image of each division area to hold into a memory, adds the first correlation data of the division areas included in each first area read out from the memory, generates second correlation data of each first area, And discriminates focus states of a plurality of first areas in predetermined order on the basis of the second correlation data of each first area.

主权项

1. A focus detection apparatus comprising:
an obtaining unit configured to obtain pixel data of an object obtained by an imaging unit having a pupil dividing means of a photographing optical system for forming an optical image of the object; a setting unit configured to set a focus detection area divided into a plurality of division areas and a plurality of different first areas to determine a focus state in the focus detection area; an arithmetic operation unit configured to arithmetically operate first correlation data with respect to an object image of each division area by using the pixel data; a memory configured to hold the first correlation data for every division area; a generation unit configured to generate second correlation data of each of the first areas by reading out the first correlation data of the division area included in each of the first areas from the memory and adding the read-out first correlation data; and a determining unit configured to determine the focus states of the plurality of first areas in predetermined order on the basis of the generated second correlation data of each of the first areas.