Exposure adjustment method and device, camera and computer storage medium

Abstract

The invention discloses an exposure adjustment method and device, a camera and a computer storage medium, and belongs to the technical field of cameras. The method, the device, the camera and the medium are used for using an explore value, which is after taking effect by prediction adjustment, as a basis of exposure adjustment, and thus alleviating the overshooting problem occurring in the prior art. The method includes: obtaining an estimated explore value, which is after taking effect by setting of lastly output exposure parameter values, according to an explore value of a shot current picture and historical exposure parameter values corresponding to the explore value of the current picture, wherein exposure parameters include a gain, a shutter or an aperture; determining whether a ratioof a target explore value (TEV) to the estimated explore value is in a preset range; and when it is determined that the ratio of the target explore value to the estimated explore value is not in thepreset range, determining a new exposure parameter value according to on the ratio of the target explore value to the estimated explore value, and carrying out exposure adjustment according to the newexposure parameter value.

Description

technical field [0001] The invention relates to the technical field of cameras, in particular to an exposure adjustment method and device, a camera and a computer storage medium. Background technique [0002] At present, cameras are widely deployed in various public places, providing many necessary auxiliary functions for the security cause. Among them, for cameras, exposure is a relatively important parameter, and various devices have different requirements for exposure. For example, current cameras can include cameras controlled across chips and cameras controlled on the same chip. The chip-controlled camera refers to the need to control the sensor (Sensor) connected to the current chip on another chip. Compared with the control of the same chip, the cross-chip control solution will inevitably bring about the problem of increased delay in exposure control. Generally speaking, the exposure calculation delay of cross-chip control is 1 to 2 frames longer than that of the sam...

AI Technical Summary

Problems solved by technology

Among them, for cameras, exposure is a relatively important parameter, and various devices have different requirements for exposure. For example, current cameras can include cameras controlled across chips and cameras controlled on the same chip. The chip-controlled camera refers to the need to control the sensor (Sensor) connected to the current chip on another chip. Compared with the control of the same chip, the cross-chip control solution will inevitably bring about the problem of increased delay in exposure control. Generally speaking, the exposure calculation delay of cross-chip control is 1 to 2 frames more than that of the same chip control, which is equivalent to an increase of 30% to 50% in delay.

At present, when adjusting the exposure, it is based on the statistical brightness value (ExploreValue, EV) of the current image, but due to the existence of delay, the previously set exposure parameter value may not take effect. It may be misunderstood that the exposure adjustment needs to be continued, and the exposure adjustment is repeated many times, resulting in an overshoot

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