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Automatic focusing method and device

An automatic focus and optimal focus technology, applied in the video field, can solve the problems of poor automatic focus effect and inability to actually improve the image quality of the target area, so as to achieve the effect of improving the focusing effect, improving the original image quality, and improving the encoding quality

Active Publication Date: 2014-09-03
SHENZHEN INFINOVA
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Problems solved by technology

However, if the original image itself is out of focus, or due to the large field of view, some areas that need attention do not achieve the required focus effect, even if the compression ratio is reduced in encoding, the image quality of the target area cannot actually be improved
[0003] In summary, the autofocus effect of the target area in the prior art is poor

Method used

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  • Automatic focusing method and device
  • Automatic focusing method and device

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] In the embodiment of the present invention, the weight of the auto-focus evaluation value of the region of interest is determined by the parameters of the region of interest, and then the statistical value of auto-focus is determined by the auto-focus evaluation value and weight of the region of interest, thereby triggering the auto-focus operation to automatically The focus statistical value reaches the maximum value, thereby improving the focusing effect of the region of interest in the video image, and improving the quality of the original image of the video while improving the encoding qu...

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Abstract

The invention provides an automatic focusing method and device, suitable for the field of video technology. The method comprises the steps of obtaining an automatic focusing evaluation value of an interested area; setting parameters of the interested area; determining the weight of the automatic focusing evaluation value according to the parameters of the interested area; determining an automatic focusing statistic value of the interested area according to the automatic focusing evaluation value and the weight; and triggering an automatic focusing operation so that the automatic focusing statistic value reaches the maximum. According to the method, the weight of the automatic focusing evaluation value is determined according to the parameters of the interested area, then the automatic focusing statistic value of the interested area is determined according to the automatic focusing evaluation value and the weight, and thus the automatic focusing operation is trigged so that the automatic focusing statistic value reaches the maximum, thereby improving the focusing effect of the interested area in a video image, the coding quality of the interested area and the original image quality of video.

Description

technical field [0001] The invention belongs to the field of video technology, and in particular relates to an automatic focusing method and device. Background technique [0002] In the field of video technology, the image quality of the target area is generally improved by reducing the compression ratio of the target area during encoding, so that the image quality of the target area in the video is improved to a level as close as possible to the original image. However, if the original image itself is out of focus, or due to the large field of view, some areas that need attention do not achieve the required focus effect, even if the compression ratio is reduced during encoding, the image quality of the target area cannot actually be improved. [0003] To sum up, the auto-focus effect of the target area in the prior art is poor. Contents of the invention [0004] The purpose of the embodiments of the present invention is to provide an automatic focusing method to improve ...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N19/167
Inventor 肖正
Owner SHENZHEN INFINOVA
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