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Dynamic HDR image feature extraction method

An image feature extraction and dynamic technology, which is applied in the field of audio and video encoding and transcoding processing, can solve problems such as not considering the relationship between pixels, and achieve the effect of simplifying calculation steps, reducing calculation complexity, and reducing bandwidth load

Pending Publication Date: 2021-11-02
HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Each stage of the above processing method is processed independently, and each pixel is processed independently, regardless of the relationship between pixels

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  • Dynamic HDR image feature extraction method

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Embodiment Construction

[0044] 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 some of the embodiments of the present invention, but not all of them. 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.

[0045] refer to figure 2 Shown is the flow chart of the steps of the dynamic HDR image feature extraction method of the embodiment of the present invention, including the following steps:

[0046] Input a YUV image, group the input image pixels, and record all pixels sharing a set of UV as a pixel group;

[0047] Traverse each pixel group and calculate the R, G, and B component values ​​of all pixels in each pixel group. When calculating, the UV...

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Abstract

The embodiment of the invention discloses a dynamic HDR image feature extraction method, which comprises the following steps: inputting a YUV image, grouping pixel points of the input image, and recording all pixel points sharing a group of UV as a pixel group; traversing each pixel group, calculating R, G and B component values of all pixel points in each pixel group, during calculation, sharing UV values, taking Y component values of corresponding positions as Y pixel values, and calculating RGB component values of other pixels in the group through one pixel; calculating a maximum value in R, G and B components of a certain pixel in the pixel group, and recording a maximum value index; according to the RGB component value and the recorded maximum component index, calculating histogram statistics of the RGB component and the maximum component in the pixel group; and performing traversal accumulation or merging on the histograms of each pixel group, and calculating RGB and RGB maximum component histogram statistics of the whole image.

Description

technical field [0001] The invention belongs to the technical field of audio and video encoding and transcoding processing, and in particular relates to a dynamic HDR image feature extraction method. Background technique [0002] In the dynamic HDR (High-Dynamic Range, high dynamic range image) encoding and transcoding processing system, it is necessary to calculate and extract the dynamic HDR metadata of each frame of video in real time, and embed it into the code stream. In the process of dynamic HDR metadata calculation, the brightness distribution of the image needs to be counted as the basis for subsequent dynamic metadata parameter generation. [0003] YUV (also known as YCrCb) is a color coding method adopted by the European television system. In modern color TV systems, three-tube color cameras or color CCD cameras are usually used to capture images, and then the obtained color image signals are separated, enlarged and corrected to obtain RGB, and then the brightnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06F16/51
CPCG06F16/51
Inventor 石小明许国忠孙伟涛张贝利肖玉超
Owner HANGZHOU ARCVIDEO TECHNOLOGY CO LTD