Exposure adjustment method, device, camera and computer storage medium

Abstract

The invention discloses an exposure adjustment method and device, a camera and a computer storage medium, which belong to the technical field of cameras, and are used to use the brightness value after the adjustment takes effect as the basis for exposure adjustment, so as to alleviate the overshoot problem in the prior art . The method includes: according to the captured brightness value of the current picture and the historical exposure parameter value corresponding to the brightness value of the current picture, obtaining an estimated brightness value after the last output exposure parameter value setting takes effect, wherein the exposure parameter includes Gain, shutter or aperture; determine whether the ratio of the target brightness value to the estimated brightness value is within a preset range; when it is determined that the ratio of the target brightness value to the estimated brightness value is not within a preset range, according to the Determine a new exposure parameter value based on the ratio of the target brightness value to the estimated brightness value, and perform exposure adjustment according to the new exposure 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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