Imaging apparatus, image processing device, and control method
AssigneeCanon Kabushiki Kaisha
InventorTakuya Shintani
Life of this patent
Estimating the term…
Abstract
An imaging apparatus includes a photometric sensor, and can continuously acquire a plurality of images by a single imaging operation. A CPU for image processing and an arithmetic operation acquires image data output by a photometric sensor and performs photometric processing. The CPU determines presence or absence of a flicker light source using a plurality of pieces of acquired image data, and calculates a motion vector of an object by comparison of image data. If it is determined that there is a flicker light source in a photographing environment, gain adjustment is performed on the basis of a result of flicker detection so as to have a brightness of an image suitable for detection of a motion vector, and the motion vector is calculated using image data after gain adjustment.
Claims13
An imaging apparatus comprising:
- an image sensor configured to image an object and acquire an image signal;
- at least one processor and at least one memory functioning as:
- a processing unit configured to perform photometric processing using the image signal;
- and
- a detection unit configured to perform detection of a flicker light source with cyclic changes in brightness and motion detection of the object using a plurality of image signals continuously acquired by the image sensor,
- wherein the detection unit determines presence or absence of the flicker light source by detecting a change in brightness of an image and calculates a motion amount of the object,
- wherein the processing unit performs the photometric processing using the image signal imaged and read by the image sensor at a first exposure time,
- wherein the detection unit performs the detection of the flicker light source and the motion detection of the object using the image signal imaged and read by the image sensor at a second exposure time which is shorter than the first exposure time, and
- wherein the image used for the detection of the flicker light source is used for the motion detection of the object.
A control method executed by an imaging apparatus including an image sensor that images an object, the method comprising:
- performing photometric processing using an image signal acquired by the image sensor;
- and
- determining presence or absence of a flicker light source with cyclic changes in brightness by detecting a change in brightness of an image in the detecting;
- and
- calculating a motion amount of the object using a plurality of image signals continuously acquired by the image sensor,
- wherein the image signal imaged and read by the image sensor at a first exposure time is used for the performing,
- wherein the image signal imaged and read by the image sensor at a second exposure time which is shorter than the first exposure time is used for the determining and the calculating, and
- wherein the image used for the detection of the flicker light source is used for the motion detection of the object.
Dependencies are inferred from the claim text.