A kind of automatic aperture adjustment method and device

Abstract

The embodiment of the present invention discloses an automatic aperture adjustment method and device. The method includes: determining the first brightness adjustment amount according to the difference between the average brightness of the image collected by the automatic aperture lens and the target brightness; adjusting the automatic aperture according to the first brightness adjustment amount The aperture of the lens, and / or adjust the exposure time and / or exposure gain of the image sensor, so that the difference between the average brightness of the current image and the target brightness first meets the preset condition; the automatic iris lens is determined to meet the first preset condition The fine-tuning range corresponding to the aperture, within the fine-tuning range, adjust the aperture of the auto-iris lens to find the aperture corresponding to the highest resolution, and adjust the aperture of the auto-iris lens to the aperture corresponding to the highest resolution. The embodiment of the present invention can improve the overall quality of the image.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of camera aperture adjustment, in particular to an automatic aperture adjustment method and device. Background technique [0002] The automatic aperture of the camera lens refers to a mechanism in the lens that can control the amount of light entering by adjusting the aperture size. Using a certain strategy to adjust the aperture size of the aperture, images with suitable brightness can be obtained under different lighting conditions. [0003] Currently commonly used automatic aperture adjustment methods, such as those disclosed in Chinese patents CN101827217 and CN102135700, are based on the average brightness of the current image and the amount of incoming light as the only basis for aperture adjustment to adjust the size of the aperture. The size of the aperture will affect the resolution of the image. When the aperture is too large, the imaging depth of the lens will become smaller,...

AI Technical Summary

Problems solved by technology

The size of the aperture will affect the resolution of the image. When the aperture is too large, the imaging depth of the lens will become smaller, which will easily lead to insufficient clarity of the subject outside the focus of the screen, resulting in poor image resolution; and When the aperture is too small, due to the diffraction effect of light, the image resolution will also be deteriorated

That is, adjusting the size of the aperture based solely on the amount of incoming light can ensure moderate brightness of the image, but it cannot guarantee the best resolution of the image, and the overall quality of the final image is still unsatisfactory.

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