Method and device for calculating brightness value of region of interest
A technology of region of interest and luminance value, which is applied in the field of image processing and can solve problems such as inaccurate luminance value of the region of interest
Active Publication Date: 2021-01-29
HANGZHOU HIKVISION DIGITAL TECH
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Problems solved by technology
However, in practical applications, there are many situations in the state of the face in the region of interest, such as the frontal face and different types of side faces. For the case of the side face, when counting the brightness of the region of interest, due to the The brightness of the region is also counted, making the calculated brightness value of the region of interest inaccurate
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[0111] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0112] In order to improve the accuracy of the luminance value of the region of interest, the embodiments of the present invention provide a method, device, electronic device and computer-readable storage medium for calculating the luminance value of the region of interest. A method for calculating the luminance value of the region of interest provided by the embodiment of the present invention is firstly introduced below.
[0113] Such as figure 1 As shown, ...
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An embodiment of the present invention provides a method and device for calculating the brightness value of a region of interest. The method includes: determining the region of interest where the object of interest is located in the current video frame, and determining the state of the object of interest; The region of interest is divided into a preset number of sub-region blocks, and the brightness value of each sub-region block is obtained; according to the state of the object of interest, the brightness weight value of each sub-region block in the region of interest is determined; according to each The luminance weight value of the sub-region block, the luminance value of each sub-region block in the described region of interest is counted to obtain the luminance value of the described region of interest; the solution provided by the embodiment of the present invention can improve the location of the object of interest. The accuracy of the brightness value of the region of interest.
Description
technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and device for calculating brightness values of regions of interest. Background technique [0002] Exposure is to make the brightness of the image reach an appropriate target value by adjusting the aperture, shutter, gain, etc. There will not be much change, but the brightness of the local region of interest in the image may change greatly, which is not conducive to the identification of objects in the image and subsequent data analysis. Therefore, it is necessary to adjust the exposure parameters to adjust the brightness of the region of interest. Brightness, so that the brightness of the region of interest remains within an appropriate brightness range under different lighting conditions. [0003] The following takes face-based video surveillance as an example for illustration. [0004] In face-based video surveillance, the face is the object of in...
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IPC IPC(8): H04N5/235H04N5/243H04N23/76
CPCH04N23/73H04N23/76H04N23/611H04N23/72H04N23/71G06T7/74G06T7/20G06T2207/10016G06T2207/20021G06V20/40G06V40/16G06V20/52
Inventor 陈磊刘刚曾峰
Owner HANGZHOU HIKVISION DIGITAL TECH