A blue screen cutout method

Abstract

The invention discloses a blue screen cutout method. Firstly, the video is transmitted to the GPU, and the blue screen cutout process is performed on the video frame in the GPU, thereby increasing the cutout speed. Specifically, the background color of the video frame is first extracted, and according to the background color, the opacity processing is performed on the blue screen image using the color difference matting technology, and then the initial opacity image is obtained after binarization processing, and then the gradient information of the color image and the The improved joint bilateral filter optimizes the initial opacity to obtain the final opacity image, and finally removes background color overflow from the final opacity image and then sends it back to the CPU client for display on the display device. This greatly reduces human interaction and adjustment of parameters throughout the processing.

Description

technical field [0001] The invention belongs to the field of visual special effects, and more specifically relates to a blue screen cutout method. Background technique [0002] Image matting refers to a technique for accurately extracting foreground objects from images or video sequences. As a key technology in the field of visual effects, matting technology is widely used in image editing and film production. However, due to the unconstrained nature of the matting problem, additional constraints need to be added when solving the problem. Therefore, in film and television production, blue screen or green screen is usually used as the shooting background to reduce the difficulty of solving the problem. This will The blue screen or green screen as the background cutout technology is usually called blue screen cutout technology. [0003] The development of blue screen cutout has produced many different techniques today. Common blue screen keying technologies mainly include: ...

AI Technical Summary

Problems solved by technology

Compared with the single-channel matting technology, the combined H, L, and S three-channel matting technology is more accurate. The disadvantage is that there are more parameters to be adjusted, and the manual interaction is relatively large.

Although 3D matting technology can achieve better results, the speed and human interaction still need to be further improved

[0009] From the above analysis, it can be seen that the existing blue screen cutout technology cannot achieve ideal results in the cutout speed, cutout quality and manual interaction at the same time. Therefore, it is necessary to conduct in-depth research on the blue screen cutout technology.

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