High-dynamic range video processing method

A high dynamic range and video processing technology, applied in the field of image processing, can solve the problems that HDR video cannot present the beauty and fidelity, and the content creator's intention cannot be well preserved, so as to achieve the effect of good image beauty and fidelity

Active Publication Date: 2017-09-12
HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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Problems solved by technology

If different video files or different scenes of the same video file are processed with the same parameters, the converted HDR video will certainly not be able to present good aesthetics and fidelity, and the content creator's intention will not be well preserved

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as figure 1 In the described embodiment, a kind of high dynamic range video processing method, concrete operation steps are as follows:

[0032] (1) the standard dynamic range video of input is decoded, obtains the data of YCbCr color space;

[0033] (2) the data of the YCbCr color space obtained is carried out color space transformation in BT.709 color gamut, obtain the data of RGB color space;

[0034] (3) In the obtained data of the RGB color space, electro-optic conversion is performed on the color components in the three channels of R / G / B respectively; the conversion function of the electro-optic conversion adopts the ITU-R BT.709 standard;

[0035] (4) The color components in the three channels of R / G / B are respectively processed by inverse tone mapping parameters, and the result is: R HDR =R SDR · Coef, G HDR =G SDR Coe...

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Abstract

The invention discloses a high-dynamic range video processing method which comprises the following steps: detecting brightness values and contrast ratios of different scenes of a standard dynamic range (SDR) video so as to obtain a corresponding gamma value of each scene, further calculating according to the gamma values so as to obtain parameters for reverse tone mapping, and performing final conversion, so as to obtain high-dynamic range (HDR) video data. The method has the beneficial effects that the method is automatically applicable to most videos of different styles and different scenes, influence of brightness/contrast ratios in different scenes and areas in different conversion processes is taken into account, creation intentions of original content makers can be maintained in final conversion results to a very large extent, and very good image attractiveness and fidelity can be represented.

Description

technical field [0001] The present invention relates to the related technical field of image processing, in particular to a high dynamic range video processing method. Background technique [0002] High Dynamic Range (Hereinafter referred to as HDR) video, compared with Standard Dynamic Range (Hereinafter referred to as SDR) video, the light and dark levels of the image are clearer, the image details are richer, and the real scene can be reproduced more realistically . With the development of HDR technology and the gradual popularization of HDR displays, the demand for HDR video is gradually increasing. True HDR video production requires the use of high dynamic range imaging devices at the acquisition end, and the use of HDR non-editing software during production, which means that HDR video content production has high requirements for shooting equipment and pre-processing technology. Therefore, the HDR content currently on the market is still relatively scarce. On the oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/90H04N19/186
CPCG06T7/90H04N19/186
Inventor 王建伟黄进廖义
Owner HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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