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Luminance evaluation

A brightness and chromaticity technology, applied in image data processing, television, instruments, etc., can solve problems such as pixel change

Active Publication Date: 2011-09-14
康特爱尔莫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Unfortunately, watermarking causes changes that affect pixels in a given area of ​​the video

Method used

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Embodiment Construction

[0025] The present invention pertains to the evaluation and implementation of watermarks, and embodiments of the invention include a list creation step, which may be followed by a set of list filtering steps. The output of the list creation step is a list of changes that can be made that are not objectionable to the observer. The filtering step maintains a list of changes satisfying at least one constraint, but satisfying various constraints would be preferred. The most important constraint is that after watermark embedding, the labeled image should look and feel the same as the unlabeled original image.

[0026] A key feature of the invention is the estimation and / or calculation of luma and chrominance changes due to changes in motion vectors or changes in intra prediction references. The process of evaluating changes caused by modifying motion vector values ​​during watermark embedding is referred to herein as Luma Evaluation (LumEval). Luminance evaluation measures the am...

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Abstract

A method comprises providing a change to apply to video; dividing video into blocks; creating propagation map which captures only specific changes to blocks that would be changed by the application of the change; evaluating the change based on a luminance criterion as being a perceptible change or an imperceptible change; for propagation maps of an imperceptible change, storing the propagation map to a list, wherein the propagation map is the principle data structure to be applied to the video. The propagation map can be created by using motion vector changes associated with the change.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of and priority to US Provisional Patent Application No. 61 / 189,363, filed August 19, 2008, entitled "LUMINANCE EVALUATION." The entire content of this provisional application is expressly incorporated herein by reference for all purposes. technical field [0003] The present invention relates to a method for quantitatively evaluating a watermark and applying the watermark to a video. Background technique [0004] Today, digital watermarking as an anti-piracy technique is strongly demanded. In order to make it more difficult for pirates to circumvent watermarks, it is important to come up with and use many potential watermarks. [0005] Unfortunately, watermarking causes changes that affect pixels in a given area of ​​the video. As such, it is important that the watermark does not cause changes that may interfere with the intended viewing experience of the intended audience. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N19/00151H04N7/26207H04N19/00278H04N7/26861H04N7/26244G06T2201/0202H04N19/00557H04N7/50H04N21/8358H04N7/26138H04N19/00781H04N19/00212H04N19/00684H04N7/26372H04N21/23892G06T1/0028G06T2201/0051G06T2201/0061H04N19/139H04N19/157H04N19/176H04N19/467H04N19/513H04N19/61G06T1/00
Inventor 何杉杰弗里.A.布卢姆邹德坤
Owner 康特爱尔莫
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