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Method and apparatus for converting first dynamic range video to second dynamic range video

一种动态范围、视频转换的技术，应用在图像数据处理、仪器、计算等方向，能够解决亮度变化的连续性丢失、闪烁效应等问题

Active Publication Date: 2019-10-08
TFI DIGITAL MEDIA LTD
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  • Description
  • Claims
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Problems solved by technology

However, due to the different spatial statistics of each frame, an adaptive transformation utilizing only spatial information may lead to loss of continuity of brightness changes from frame to frame
Except in the case of scene transitions, this adaptive transition is likely to cause flickering effects

Method used

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  • Method and apparatus for converting first dynamic range video to second dynamic range video
  • Method and apparatus for converting first dynamic range video to second dynamic range video
  • Method and apparatus for converting first dynamic range video to second dynamic range video

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Embodiment Construction

[0014] In the following description, a conversion method for enhancing the dynamic range of video is taken as a preferred example. It will be apparent to those skilled in the art that modifications including additions and / or substitutions can be made thereto without departing from the scope and spirit of the present invention. Specific details may be omitted in order not to obscure the invention; however, the disclosure is written to enable one skilled in the art to practice the teachings herein without undue experimentation.

[0015] figure 1 A flow chart of a method for converting an SDR video into an HDR video based on one embodiment of the present invention is shown. The method includes: generating a breathing parameter 103 of the current frame from time information 101 and spatial information 102 of the current frame and one or more previous frames of the SDR video; Determine one or more mapping functions 104; determine one or more weights 105 of each pixel of the curre...

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Abstract

A method and apparatus for converting a first dynamic range video to a second dynamic range video are disclosed. The conversion is adaptive and takes both spatial and temporal information of a currentframe and previous frames into consideration such that the majority of pixels falls into the most sensitive regions of human eyes in the target dynamic range, while at the same time, the continuity of luminance is maintained in temporal domain to prevent flickering.

Description

[0001] Copyright Notice [0002] Portions of the disclosure of this patent document contain material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction of any patent document or patent disclosure as this patent appears in the Patent and Trademark Office patent files and records, but otherwise reserves all copyright rights. technical field [0003] The present invention relates to digital image and video processing and dynamic range conversion of images and video. More specifically, it relates to methods of enhancing standard dynamic range images and video to high dynamic range images and video. Background technique [0004] In the past, due to limitations in camera and monitor systems, most video was captured at a low dynamic range related to human perceptual sensitivity and encoded as Standard Dynamic Range (SDR) video. However, the rapid development of high dynamic range (HDR) display technology is driving the dema...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10016G06T5/90G06T5/40G06T2207/20208G06T5/92
Inventor 黄汉华陆瀚东冯志强施演张学坤袁耀辉
Owner TFI DIGITAL MEDIA LTD
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