Auto focusing apparatus and auto focusing method, and image sensing apparatus

摘要

When a face is detected from image signals, stability determination time is set for determining if the face is recognized in a stable manner, and a period of time for which the face is consecutively detected starts to be measured. Until the measured period of time exceeds the stability determination time, an AF evaluation value acquired from a normal frame set to include a face frame corresponding to the face is used to exercise TV-AF control. Once the measured time exceeds the stability determination time, TV-AF control is exercised based on AF evaluation values acquired from each of the face frame and the normal frame.

主权项

1. An auto focusing apparatus comprising:
a detection unit configured to detect a specific object from image signals periodically supplied; a determination unit configured to determine whether or not the specific object has been consecutively detected; a setting unit configured to set a first area corresponding to the specific object detected by the detection unit and a second area which is different from the first area until the determination unit determines that that specific object has been consecutively detected; and a focusing unit configured to perform focusing control by an imaging optical system based on image signals, wherein the focusing unit starts the focusing control based on the image signal in the second area until the determination unit determines that the specific object has been consecutively detected, and starts the focusing control based on the image signals in the first area in a case where the determination unit determines that the specific object has been consecutively detected.