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Color adjustment

A color adjustment and color technology, applied in the field of color adjustment, can solve problems such as time-consuming

Inactive Publication Date: 2011-05-18
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve the desired match, the user has to experiment with several parameters such as brightest parts, midtones, shadows, brightness, contrast, etc., which is time-consuming and, in many cases, nearly impossible

Method used

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Embodiment Construction

[0011] figure 1 A semi-automatic embodiment of the invention is illustrated. In this scheme, the user provides not only a reference image RI and an input image II that needs to be adjusted to the reference image RI, but also a matching pair of representative points RP. For both the reference image RI and the input image II, the dominant colors at representative points are calculated in blocks 10 , 20 . This gives color information at pixels that are very resistant to color noise. In a preferred embodiment, the mean-shift algorithm of the article "Mean Shift Analysis and Applications" by D. Comaniciu and P. Meer in Proceedings ICCV (2) 1999, pp. 1197-1203 is used to Calculate the dominant color for each representative point. We define the local dominant color as the color whose estimated density (eg estimated by histogram) is locally dominant in a certain neighborhood. Another way to see this is that a dominant color in a part of a color space is the most typical representa...

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Abstract

To adjust colors in an input image (II) to colors of a reference image (RI), matching reference points (RP) are provided in the input image (II) and the reference image (RI), dominant colors of the matching reference points (RP) aredetermined (10, 20), and the colors in the input image (II) are transformed (30, 40) based on the dominant colors of the matching reference points to obtain an output image (OI).

Description

technical field [0001] The present invention relates to methods and devices for color adjustment. Background technique [0002] Various professional or semi-professional applications such as stereo photography, surveillance, TV production, wedding or sports videography use multiple cameras. With the increased availability and affordability of digital still picture and video cameras, events such as parties, museum visits and holidays are also recorded by many people. This provides a large pool of content that can be swapped or combined to better represent events. [0003] The process of combining different camera recordings involves frame-accurate time synchronization, evaluating content, and selecting the segments that contain the best evaluated content. The expected result is a combined frame or video that appears seamless and unified as if it were captured from a single camera. [0004] Different cameras provide different recording qualities based on hardware and softwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/60H04N1/387
CPCH04N1/6011H04N1/60H04N1/387H04N23/10
Inventor P.施雷斯塔D.塞库洛夫斯基M.巴比里J.韦达R.A.W.克劳特
Owner KONINK PHILIPS ELECTRONICS NV