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Blue screen image matting method based on chroma overflowing processing

An overflow processing, blue screen technology, applied in image data processing, image analysis, graphic image conversion and other directions, can solve problems such as poor processing of chromatic overflow phenomenon

Active Publication Date: 2015-06-03
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0005] In order to solve the problem that a large amount of user interaction is required and the chroma overflow phenomenon is not handled well in the existing image matting method, the purpose of the present invention is to provide a blue screen image matting method based on chroma overflow processing, which only needs to be carried out before shooting Simple input can automatically complete image keying and chroma overflow processing, even for images with serious chroma overflow phenomenon, you can also get more satisfactory results

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  • Blue screen image matting method based on chroma overflowing processing
  • Blue screen image matting method based on chroma overflowing processing
  • Blue screen image matting method based on chroma overflowing processing

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Embodiment Construction

[0049] The implementation of the present invention will be described in detail below in conjunction with the drawings and specific examples.

[0050] In this embodiment, a blue-screen keying method based on chroma overflow processing is applied to an image captured in a blue background, and the processing flow is as follows Figure 4 shown. Specific steps are as follows:

[0051] 1. Divide the foreground image into opaque areas, semi-transparent areas, and fully transparent areas, and display the area division results. This step includes the following sub-steps:

[0052] 101. Load and display a foreground image shot in a blue background, such as figure 1 shown. This image is first obtained by using a blue curtain as a background, and then using a camera to shoot a person in front of the blue curtain background. After the image is loaded, the color space of each pixel is RGB space.

[0053] 102. The user uses a brush tool to select a set of key color pixel points in the k...

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Abstract

The invention relates to a blue screen image matting method based on chroma overflowing processing. The blue screen image matting method is characterized by comprising the following specific steps: dividing a foreground image to be subjected image matting into a non-transparent region, a semi-transparent region and a full-transparent region, and displaying a region division result; calculating based on a sampled Alpha value; calculating the Alpha value of each point of the foreground image; loading a background image used for being synthesized with the foreground image; synthesizing the foreground image and the background image; calculating a RGB color value of each pixel point of the synthesized image; and carrying out the chroma overflowing processing on each pixel point of the synthesized image. According to the method, only simple input needs to be carried out before photographing, namely the image matting and the chroma overflowing processing can be automatically finished; with regard to the image with the more serious chroma overflowing phenomenon, the more satisfied effect can be obtained.

Description

technical field [0001] The invention relates to a blue-screen image matting method based on chroma overflow processing, in particular to a sampling-based chroma overflow processing method in blue screen image matting processing, and belongs to the technical field of computer image processing. Background technique [0002] Blue-screen keying refers to the technique of accurately separating the foreground object from an image with a known monochrome background, and then combining it with other images to obtain the required special effects. In blue-screen keying, the image to be keyed is called the foreground image; the image to be combined with it is called the background image; the known monochrome background color in the foreground image is called the key color of the foreground image. Early blue-screen keying usually required the key color of the foreground image to be blue, so this technique was named blue-screen keying. With the development of keying technology, the requ...

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Application Information

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IPC IPC(8): G06T7/00G06T3/00H04N9/04
Inventor 权巍薛耀红韩成蒋振刚范静涛杨华民冯欣
Owner CHANGCHUN UNIV OF SCI & TECH
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