Blue screen image matting method based on chroma overflowing processing

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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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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