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A method and apparatus for inverse-tone mapping a picture

A tone mapping, image technology, applied in the field of inverse tone mapping, to achieve a good matching effect

Inactive Publication Date: 2017-09-26
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The distributed SDR video can be displayed on the receiver side as is, but the viewer will not benefit from the full motion capabilities of his display

Method used

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  • A method and apparatus for inverse-tone mapping a picture
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  • A method and apparatus for inverse-tone mapping a picture

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Embodiment Construction

[0065] The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure are shown. This disclosure may, however, be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein. Therefore, while the present disclosure allows for various modifications and alternative forms, certain embodiments are shown in the drawings by way of example and will hereinafter be described in detail. It should be understood, however, that there is no intent to limit the disclosure to the particular forms disclosed, but on the contrary this disclosure is to cover all modifications, equivalents and / or alternatives falling within the spirit and scope of the disclosure as defined by the claims.

[0066] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the...

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Abstract

The present disclosure generally relates to a method and device for inverse-tone mapping a picture. The method comprising: obtaining (20) a first component (Y) comprising: obtaining a luminance component (L) from said color picture; obtaining a resulting component by applying (20), a non-linear function on said luminance component (L) in order that the dynamic of the resulting component is increased compared to the dynamic of the luminance component (L); obtaining a modulation value (Ba) from the luminance of said color picture; obtaining the first component (Y) by multiplying said resulting component by said modulation value (Ba); obtaining two chrominance components (C1, C2) from said color picture; obtaining a first factor (r(L(i))) that depends on the value (L(i)) of a pixel (i) of said luminance component (L); obtaining at least one color component (Ec) from said first component (Y), said two chrominance components (C1, C2) and said first factor (r(L(i))); and forming the inverse-tone mapped color picture by combining together said at least one color component (Ec).

Description

technical field [0001] This disclosure generally relates to image / video inverse tone mapping. In particular, but not exclusively, the technical field of the present disclosure relates to inverse tone mapping of images whose pixel values ​​fall within the low dynamic range. Background technique [0002] This section is intended to introduce the reader to various technical aspects that may be related to various aspects of the present disclosure that are described and / or claimed below. It is believed that this discussion helps to provide the reader with background information to help better understand various aspects of the present disclosure. Accordingly, it should be understood that these statements are to be read in this fashion, and not as admissions of prior art. [0003] In the following, a color image contains an array of several samples (pixel values) of a specific image / video format that specifies all information relative to the pixel values ​​of the image (or video)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/136H04N19/182H04N19/186G06T5/00
CPCH04N19/136H04N19/182H04N19/186G06T5/00G09G2340/0428G09G2320/0271G09G2360/16H04N9/69G06T2207/20208G06T2207/10024G06T5/90G06T5/92
Inventor 塞巴斯蒂安·拉萨尔法布里斯·勒林内克斯特凡·勒梅勒
Owner THOMSON LICENSING SA