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Exposure parameter adjusting method and device

A technology of exposure parameters and adjustment methods, applied in the field of image processing, which can solve problems affecting the overall effect of the video, repeated changes in image brightness, and different density and brightness of faces

Active Publication Date: 2021-05-18
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for adjusting exposure parameters, to at least solve the situation in the related art that the density of faces in a video is low or the brightness of multiple faces is different, and the image brightness in the video will change repeatedly, affecting the overall effect of the video The problem

Method used

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  • Exposure parameter adjusting method and device
  • Exposure parameter adjusting method and device

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Experimental program
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Embodiment 1

[0038] The method embodiment provided in Embodiment 1 of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, figure 1 It is a block diagram of the hardware structure of the mobile terminal of the exposure parameter adjustment method of the embodiment of the present invention, as figure 1 As shown, the mobile terminal may include one or more ( figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the above-mentioned mobile terminal also A transmission device 106 for communication functions as well as input and output devices 108 may be included. Those of ordinary skill in the art can understand that, figure 1 The shown structure is only for illustration, and does not limit the str...

Embodiment 2

[0109] Embodiments of the present invention also provide an exposure parameter adjustment device, Figure 9 is a flowchart of an exposure parameter adjustment method according to an embodiment of the present invention, such as Figure 9 shown, including:

[0110] Obtaining module 92, for obtaining one or more human face regions of the target image in the target video;

[0111] The first determination module 94 is used to determine whether there is at least one human face area in the one or more human face areas based on a time filtering mechanism, which belongs to the normal situation of human face density;

[0112] The second determination module 96 is used to determine the target face area of ​​the target image based on the tracking and filtering mechanism when the judgment result is yes;

[0113] An adjustment module 98, configured to adjust the exposure parameters of the target image according to the target face area.

[0114] Through the above-mentioned device, it can ...

Embodiment 3

[0131] Embodiments of the present invention also provide a computer-readable storage medium, in which a computer program is stored, wherein the computer program is set to execute the steps in any one of the above method embodiments when running.

[0132] Optionally, in this embodiment, the above-mentioned storage medium may be configured to store a computer program for performing the following steps:

[0133] S1, acquiring one or more face regions of a target image in a target video;

[0134] S2, determine whether there is at least one human face region in the one or more human face regions based on a time filtering mechanism, which belongs to the normal situation of human face density;

[0135] S3, if the judgment result is yes, determine the target face area of ​​the target image based on the tracking and filtering mechanism;

[0136] S4. Adjust the exposure parameter of the target image according to the target face area.

[0137] Optionally, in this embodiment, the above-...

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Abstract

The invention provides an exposure parameter adjusting method and device, and the method comprises the steps: obtaining one or more face areas of a target image in a target video; determining whether at least one face area in the one or more face areas belongs to a face density normal condition or not based on a time filtering mechanism; when a judgment result is yes, determining a target face area of the target image based on a tracking filtering mechanism; and adjusting exposure parameters of the target image according to the target face area, thereby solving the problem that the overall effect of video is affected due to repeated change of the image brightness in the video under the condition that the face density in the video is relatively low or the brightness of a plurality of faces is different in the prior art, under the condition that the face density in the video is relatively low or the brightness of a plurality of faces is different, the video quality is ensured to be stable, no repeated brightness change exists, and at least one face is ensured to be accurately exposed.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to a method and device for adjusting exposure parameters. Background technique [0002] In the related art, in order to improve the exposure effect of the face area in the video, an adaptive exposure method is proposed to judge whether the brightness of the face area is distributed within a specific threshold range. Brightness adjusts the exposure parameter. [0003] The above solution does not deal with the low density of faces in the image. When a face with low face density or short duration appears in the image, the brightness of the image will change repeatedly, affecting the overall effect of the video. There is also no differentiated treatment for the presence of multiple faces in the image. Due to the complex lighting conditions, the brightness of multiple faces in the image may be different, resulting in repeated changes in image brightness and affecting the overall ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232H04N5/235
CPCH04N23/611H04N23/71
Inventor 管清岩张思博瞿二平
Owner ZHEJIANG DAHUA TECH CO LTD