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A method of image color correction based on chroma key selection

An image and chroma key technology, applied in the field of image color correction based on chroma key selection, can solve the problems of poor image effect and uneven transition with the original color, etc., and achieve the effect of improving the color correction effect.

Inactive Publication Date: 2016-06-15
CHINA DIGITAL VIDEO BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the prior art, when using the HSL chroma key to select the target color area in the picture, the transition between the selected target color and the original color is not smooth, and the image effect after color correction is not good

Method used

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  • A method of image color correction based on chroma key selection
  • A method of image color correction based on chroma key selection
  • A method of image color correction based on chroma key selection

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Embodiment Construction

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] An embodiment of the present invention is a method for image color correction based on color key selection, such as image 3 shown, including the following steps:

[0035] Step S101, acquiring the original color of the image.

[0036] Step S102: Set a color key according to the original color of the image, where the color key includes a center point, a threshold and a soft edge.

[0037] Step S103, a transition point is set between ...

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Abstract

An embodiment of the invention discloses a method for conducting image color correction based on color key region selection. The method includes the following steps: acquiring original color of an image, setting a color key which comprises a center point, a door limit and a soft edge according to the original color, arranging a transition point between the center point and the door limit, calculating transition point value according to door limit value, calculating first gradient according to the transition point value and the door limit value, calculating second gradient according to the door limit value and the soft edge value, selecting a target color region according to the first gradient and the second gradient and updating the original color of the image according to the selected target color region. Smooth selection of the target color region is achieved by arranging the transition point between the center point and the door limit of the color key and according to the first gradient of the transition point and the door limit and the second gradient of the door limit and the soft edge.

Description

technical field [0001] The present invention relates to the technical field of video and image processing, in particular to a method for image color correction based on color key selection. Background technique [0002] The HSL color mode is a color standard in the industry. It is obtained by changing the three color channels of hue (H), saturation (S), and lightness (L) and superimposing them on each other to obtain a variety of colors. In terms of color, HSL is the color representing the three channels of hue, saturation, and brightness. This standard includes almost all colors that human vision can perceive, and is one of the most widely used color systems at present. The HSL color mode uses the HSL model to assign an intensity value in the range 0 to 255 to the HSL component of each pixel in the image. HSL images use only three channels, allowing them to be mixed in different proportions to reproduce 16,777,216 colors on the screen. In HSL mode, values ​​from 0 to 255 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/75
Inventor 张婷李和平
Owner CHINA DIGITAL VIDEO BEIJING