Image capturing apparatus, method for controlling the same, and storage medium

摘要

An image capturing apparatus includes a detection unit that detects brightness of light from an object, an XY addressing type of image sensor, a focal plane shutter having a mechanical second curtain shutter, an electronic first curtain shutter that resets the pixels in each line, and causes accumulation of charges in the pixels to start, a period detection unit that detects periodic variation in a light amount, a prediction unit that, based on the period of the variation in the light amount, predicts variation in the light amount in a predetermined exposure time, and a control unit that controls a reset time of the electronic first curtain shutter such that charge accumulation amounts of the pixels of each line fall within a predetermined range according to the variation in the light amount.

主权项

1. An image capturing apparatus, comprising:
an XY addressing type of image sensor having a plurality of pixels; a focal plane shutter having a mechanical second curtain shutter configured to perform shielding such that light receiving in the pixels of the image sensor is suspended in sequence; an electronic first curtain shutter configured to reset the pixels in each line in sequence before the mechanical second curtain shutter travels, and to cause accumulation of charges in the pixels to start; at least one processor; and a memory storing instructions which cause the at least one processor to perform operations of a detection unit, a period detection unit, a prediction unit and a control unit, wherein: the detection unit is configured to detect brightness of light from an object; the period detection unit is configured to detect periodic variation in a light amount by sampling light from the object for a certain period of time using the detection unit; the prediction unit is configured to, based on the period of the variation in the light amount of light from the object detected by the period detection unit, predict variation in the light amount in a predetermined exposure time; and the control unit is configured to control a reset time of the electronic first curtain shutter such that charge accumulation amounts of the pixels of each line fall within a predetermined range according to the variation in the light amount predicted by the prediction unit.