Image matting method of green screen video image, computer equipment and storage medium

The invention discloses an image matting method for a green screen video image, computer equipment and a storage medium, and the method comprises the steps: carrying out the semantic-level foreground and background segmentation of a to-be-matted green screen video frame through a preset semantic segmentation model, and obtaining a foreground image matting result; wherein the green screen video frame to be subjected to image matting is obtained by reducing the resolution of an original green screen video frame; performing color mapping through a three-dimensional lookup table by at least utilizing the original green screen video frame to obtain a comprehensive mapping result of the original green screen video frame; and carrying out fusion processing on the comprehensive mapping result and the foreground image matting result to obtain a final foreground image matting result. Through the above mode, the detailed information is extracted through the three-dimensional lookup table, the semantic information is lea