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Tone mapping method and device

A technology of tone mapping and adjustment factor, applied in the field of tone mapping, which can solve the problems of poor HDR video effect, blur, and overexposure of brightness.

Active Publication Date: 2021-03-05
BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in related technologies, the process of transferring the brightness of EDR video to the brightness of SDR video cannot be handled well, and phenomena such as brightness overexposure and blurring are prone to occur, resulting in poor display effect of HDR video on SDR display devices

Method used

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  • Tone mapping method and device

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Embodiment Construction

[0051] In order to enable ordinary persons in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings.

[0052] It should be noted that the terms "first" and "second" in the specification and claims of the present disclosure and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein can be practiced in sequences other than those illustrated or described herein. The implementations described in the following examples do not represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspect...

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Abstract

The invention relates to a tone mapping method and apparatus. The method comprises the steps of obtaining linear RGB data of a high dynamic range video; mapping the linear RGB data of the high dynamicrange video into RGB data of a nonlinear standard dynamic range according to a first tone mapping function; adjusting the RGB data of the non-linear standard dynamic range according to the brightnesscharacteristics of the display of the standard dynamic range to obtain final RGB data of the non-linear standard dynamic range, wherein the first tone mapping function is mapped on the basis of the encoding standard of the ACES, and the first tone mapping function is obtained by adjusting the tone mapping function of the encoding standard of the ACES on the basis of the video image exposure degree.

Description

technical field [0001] The present disclosure relates to the field of video technology, and more specifically, to a tone mapping method and device. Background technique [0002] Dynamic range refers to the range of visible light that can be perceived by the human visual system, and can also refer to the dynamic range of visible light that can be displayed on a display. High dynamic range (HDR) refers to a dynamic range that is 14 to 15 orders of magnitude higher than the range of visible light (EDR) that the human visual system can accept. In fact, the dynamic range of visible light that the human visual system can accept is a subset of the high dynamic range. The human visual dynamic range may be referred to as a high dynamic range in a narrow sense. [0003] The dynamic range supported by consumer-grade displays is generally 200-300 or , HDTV displays support a dynamic range of 300 to 1000 . The dynamic range of these displays represents a low dynamic range (LDR) ...

Claims

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Application Information

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IPC IPC(8): H04N9/64H04N9/67
CPCH04N9/643H04N9/67
Inventor 刘培坤徐宁章佳杰何刚戴宇荣
Owner BEIJING DAJIA INTERNET INFORMATION TECH CO LTD
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