Imaging apparatus and control method for tracking a subject based on an image signal

摘要

An imaging apparatus including an electric charge accumulation unit configured to accumulate electric charge in accordance with an incident light quantity; a tracking unit configured to perform tracking; and an exposure control unit configured to perform exposure control, wherein the electric charge accumulation unit performs a first accumulation, and then performs a second accumulation after the first accumulation, wherein the tracking unit performs the tracking based on an image signal obtained through the first accumulation, and wherein the exposure control unit computes a control value for the exposure control based on at least the image signal obtained through the second accumulation of the image signal obtained through the first accumulation and an image signal obtained through the second accumulation.

主权项

1. An imaging apparatus which is capable of continuous shooting comprising:
an electric charge accumulation unit configured to accumulate electric charge in accordance with an incident light quantity; an imaging unit which is different from the electric charge accumulation unit; an optical path changing unit configured to switch an optical path of light entering via a photographing lens between a first state in which the light is guided to the electric charge accumulation unit, and a second state in which the light is guided to the imaging unit, wherein the optical path changing unit places the optical path in the second state when shooting is to be performed by the imaging unit; a tracking unit configured to perform tracking; and an exposure control unit configured to perform exposure control, wherein the optical path changing unit repeatedly switches the optical path between the first state and the second state in continuous shooting, wherein the electric charge accumulation unit performs a first accumulation and then performs a second accumulation after the first accumulation from when the optical path is changed from the second state to the first state for a next shooting in continuous shooting until the optical path is changed from the first state to the second state for the next shooting, wherein the tracking unit performs the tracking for the next shooting based on an image signal obtained through the first accumulation, and wherein the exposure control unit computes exposure condition for the exposure control of the next shooting based on a third luminance value, which is computed based on a first luminance value computed based on the image signal obtained through the first accumulation and a second luminance value computed based on the image signal obtained through the second accumulation, wherein when the shooting speed at the time of continuous shooting is higher than a predetermined value, an accumulation time of the first accumulation is set to a time shorter than a flicker period.