Real-time variable green screen generation method and image matting method based on depth information

The invention relates to a movie virtualization production method based on an LED background wall, in particular to a real-time variable green screen generation method and an image matting method based on depth information, and belongs to the field of movie virtualization production. The invention provides a real-time variable green screen generation method and an image matting method based on depth information aiming at the phenomena of color overflow and green screen penetration in the existing manufacturing technology, a depth camera is used for acquiring the outline of a shot subject, and the processed outline area of the shot subject is projected to an LED background wall as a green screen or blue screen area. An original large-area quadrilateral green screen or blue screen is replaced, the color overflowing influence on a shot object and the green screen penetrating probability are reduced, the quality of a shot picture is improved, and image matting manufacturing is rapidly conducted in later manufactu