CROSS-REFERENCE TO RELATED APPLICATION

The present application is based on PCT filing PCT/JP2019/010758, filed Mar. 15, 2019, which claims priority to JP 2018-064978, filed Mar. 29, 2018, the entire contents of each are incorporated herein by reference.

TECHNICAL FIELD

The present technology relates to an exposure control device, an exposure control method, a program, an imaging device, and a mobile body, and particularly relates to an exposure control device, an exposure control method, a program, an imaging device, and a mobile body suitable for use in auto exposure.

BACKGROUND ART

Conventionally, there has been proposed defining a distant small frame in which a distant vehicle is expected to be running with respect to a distant road vanishing point in the driving direction of a subject vehicle, and performing exposure control of an in-vehicle camera on the basis of information regarding the brightness within the distant small frame (see Patent Document 1, for example).

CITATION LIST

Patent Document

Patent Document 1: Japanese Patent Application Laid-Open No. 2017-5678

SUMMARY OF THE INVENTION

Problems to be Solved by the Invention

Meanwhile, for example, when the brightness of the surroundings abruptly changes near the entrance, exit, or the like of a tunnel, the exposure control of the in-vehicle camera may fail to be timely performed, causing a captured image to have blown-out highlights in a bright area or blocked-up shadows in a dark area. Patent Document 1 does not give consideration to measures against this problem.

The present technology has been made in view of such circumstances, and is intended to achieve appropriate exposure control.

Solutions to Problems

An exposure control device according to a first aspect of the present technology includes: a wave-detection unit that calculates a wave-detection value, in a captured image taken by an imaging unit, by assigning a smaller weight to an area that is predicted to go out of an angle of view of the imaging unit within a predetermined time; and an exposure control unit that performs exposure control of the imaging unit on the basis of the wave-detection value.

An exposure control method according to the first aspect of the present technology includes: calculating a wave-detection value, in a captured image taken by an imaging unit, by assigning a smaller weight to an area that is predicted to go out of an angle of view of the imaging unit within a predetermined time; and performing exposure control of the imaging unit on the basis of the wave-detection value.

A program according to the first aspect of the present technology is configured to cause a computer to execute processes of: calculating a wave-detection value, in a captured image taken by an imaging unit, by assigning a smaller weight to an area that is predicted to go out of an angle of view of the imaging unit within a predetermined time; and performing exposure control of the imaging unit on the basis of the wave-detection value.

An imaging device according to a second aspect of the present technology includes: an imaging unit; a wave-detection unit that calculates a wave-detection value, in a captured image taken by the imaging unit, by assigning a smaller weight to an area that is predicted to go out of an angle of view of the imaging unit within a predetermined time; and an exposure control unit that performs exposure control of the imaging unit on the basis of the wave-detection value.

A mobile body according to a third aspect of the present technology includes: an imaging unit; a wave-detection unit that calculates a wave-detection value, in a captured image taken by the imaging unit, by assigning a smaller weight to an area that is predicted to go out of an angle of view of the imaging unit within a predetermined time; an exposure control unit that performs exposure control of the imaging unit on the basis of the wave-detection value; and a movement control unit that performs movement control on the basis of the captured image.

In the first aspect and the second aspect of the present technology, a wave-detection value is calculated, in a captured image taken by an imaging unit, by assigning a smaller weight to an area that is predicted to go out of an angle of view of the imaging unit within a predetermined time, and exposure control of the imaging unit is performed on the basis of the wave-detection value.

In the second aspect of the present technology, a wave-detection value is calculated, in a captured image taken by an imaging unit, by assigning a smaller weight to an area that is predicted to go out of an angle of view of the imaging unit within a predetermined time, and exposure control of the imaging unit is performed on the basis of the wave-detection value.

In the third aspect of the present technology, a wave-detection value is calculated, in a captured image taken by an imaging unit, by assigning a smaller weight to an area that is predicted to go out of an angle of view of the imaging unit within a predetermined time, exposure control of the imaging unit is performed on the basis of the wave-detection value, and movement control is performed on the basis of the captured image.

Effects of the Invention

According to the first aspect or the second aspect of the present technology, exposure control can be appropriately performed.

According to the third aspect of the present technology, exposure control can be appropriately performed. As a result, movement of a mobile body can be appropriately controlled.

Note that the effects described above are not restrictive, and any of effects described in the present disclosure may be included.

