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Exposure ratio automatic adjustment method and device

An automatic adjustment device and an automatic adjustment technology are applied in the field of image processing and can solve the problems of not being able to adapt well to the dynamic range of long corridors, unable to automatically adjust in a wide dynamic mode, and having large differences in dynamic ranges.

Active Publication Date: 2020-02-21
ZHEJIANG UNIVIEW TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to different scenes, the dynamic range varies greatly. If the wide dynamic mode of the camera cannot be automatically adjusted, it cannot adapt to all scenes.
For example, wide dynamic mode can solve the dynamic range of the hall, but it can't adapt to the dynamic range of long corridors well; and vice versa

Method used

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  • Exposure ratio automatic adjustment method and device
  • Exposure ratio automatic adjustment method and device
  • Exposure ratio automatic adjustment method and device

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

[0029] It...

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Abstract

The invention provides an exposure ratio automatic adjustment method and device. The exposure ratio automatic adjustment method comprises the steps: acquiring multiple frames of images, wherein a first image and a second image are selected from the multiple frames of images, and the exposure time length of the first image is larger than that of the second image; obtaining first brightness of the first image and third brightness of the second image; judging whether the actual exposure ratio is adjusted or not according to the first brightness and the third brightness; and if so, adjusting the actual exposure ratio according to a preset adjustment value. Therefore, the actual exposure ratio can be automatically adjusted according to the dynamic range of the actual scene and the illuminationcondition, and the adjustment is performed according to the preset adjustment value, so that the picture can be prevented from abrupt change.

Description

Technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and device for automatically adjusting the exposure ratio. Background technique [0002] In the application of surveillance cameras, the monitored scenes are very different, many scenes have a large dynamic range, and wide dynamic needs to be turned on. However, due to the difference in scenes, the dynamic range varies greatly. If the camera is in a wide dynamic mode that cannot be automatically adjusted, it cannot adapt to all scenes. For example, the wide dynamic mode can solve the dynamic range of the lobby, but it cannot adapt to the dynamic range of the long corridor; and vice versa. Summary of the invention [0003] In order to overcome the above-mentioned shortcomings in the prior art, the purpose of the embodiments of the present invention is to provide a method and device for automatically adjusting the exposure ratio, which can automatically adjust ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235
CPCH04N23/71H04N23/73
Inventor 张文萍徐琼
Owner ZHEJIANG UNIVIEW TECH CO LTD
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