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Method for adjusting colour saturation using saturation control

A saturation and adjusted technology, applied in color signal processing circuits, respiratory protection containers, respiratory protection devices, etc., can solve problems such as color saturation

Inactive Publication Date: 2005-08-31
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] by such as figure 1 A disadvantage of the color saturation adjustment method performed by the color saturation adjustment circuit 10 shown in
That is, according to the degree of color saturation of the input sample and the value of the requested color saturation adjustment gain α, the output chroma sample U t and V t The value of may be saturated, causing some visual artifacts

Method used

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  • Method for adjusting colour saturation using saturation control
  • Method for adjusting colour saturation using saturation control
  • Method for adjusting colour saturation using saturation control

Examples

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no. 1 example

[0066] u 0 =β·U t and V 0 =β·V t (11)

[0067] in

[0068] When S t ≤L, β=1 else β = L S t (12)

[0069] At the same time U t = α U and V t =α·V (equations (1) and (2)) is obtained by multiplying the chrominance component of the input sample by the saturation adjustment gain α. figure 2 Multipliers 29 and 30 are shown for multiplying the saturation adjustment gain α by the chrominance component of the input samples, while multipliers 27 and 28 are used for multiplying the result by the saturation limit parameter β.

[0070] image 3 shown in figure 2 A more detailed block diagram of the color saturation adjustment circuit 20 is shown in . A saturation calculation circuit 24 is provided for evaluating or defining the saturation S of the input samples Y, U and V after the chrominance components of the input samples Y, U and V have been affected ...

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Abstract

A method for adjusting and limiting a colour saturation level S of a colour pixel of an input image includes steps of: obtaining a first chrominance value U and a second chrominance value V representing the colour pixel of the input image; determining the colour saturation level S in dependence on the first chrominance value U and the second chrominance value V; determining a saturation limiting parameter beta in dependence on the colour saturation level S; obtaining an adjusted first chrominance value by multiplying the first chrominance value U by the saturation limiting parameter beta ; obtaining an adjusted second chrominance value by multiplying the second chrominance value by the saturation limiting parameter beta; and representing a colour pixel of an output image with the adjusted first and second chrominance values. The process is repeated for each pixel of each image of the input video Signal.

Description

technical field [0001] The present invention is a method for adjusting the color saturation of a video signal without saturating the colors. The method includes the steps of calculating the color saturation of each color pixel of the input image and suitably limiting the increase in color saturation even if the color saturation gain is high. Therefore, the present invention provides a method of adjusting the color saturation of a video signal without causing artifacts due to color saturation. Background technique [0002] The brightness and color component Y, U, V color system, also known as the brightness color difference color system Y, R-Y, B-Y, is the most widely used color system in video systems. For example, in a digital television system, video Y, U and V signals are compressed and sent. In this type of system, since the color information is embedded in the chrominance signals U and V, directly multiply the chrominance signals U and V by the color saturation adjust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/68
CPCH04N9/68H04N23/86A62B9/02A62B31/00A62B7/02
Inventor 金永铎
Owner SAMSUNG ELECTRONICS CO LTD