Interactive image matting method, computer readable memory medium, and computer device

A computer readable memory medium, comprising an interactive image matting program;

• wherein the interactive image matting program is configured to be executed by a processor to achieve the interactive image matting method, and the interactive image matting method comprises following steps:
• obtaining an original image;
• collecting foreground sample points collection on a hair edge foreground region of the original image and collecting background sample points on a hair edge background region of the original image by a human-computer interaction method to correspondingly obtain a foreground sample space and a background sample space;
• wherein any one of the foreground sample points in the foreground sample space and any one of the background sample points in the background sample space form a sample pair;
• receiving a marking operation instruction input by a user, and smearing a hair region of the original image according to the marking operation instruction to mark unknown regions;
• traversing the unknown regions to obtain a pixel of each unknown region, traversing all the sample pairs to select a sample pair with a minimum overall cost function value for the pixel of each unknown region, and calculating an alpha value corresponding to the pixel of each unknown region according to the sample pair with the minimum overall cost function value for the pixel of each unknown region;
• and
• obtaining an alpha mask image according to the alpha value corresponding to the pixel of each unknown region, and processing the alpha mask image according to the alpha value corresponding to the pixel of each unknown region to obtain a final alpha mask image.

A computer device, comprising a memory, a processor, and an interactive image matting program stored in the memory and configured to be executed by the processor;

• wherein the interactive image matting program is executed by the processor to achieve an interactive image matting method, and the interactive image matting method comprises following steps:
• obtaining an original image;
• collecting foreground sample points on a hair edge foreground region of the original image and collecting background sample points on a hair edge background region of the original image by a human-computer interaction method to correspondingly obtain a foreground sample space and a background sample space;
• wherein any one of foreground sample points in the foreground sample space and any one of background sample points in the background sample space form a sample pair;
• receiving a marking operation instruction input by a user, and smearing a hair region of the original image according to the marking operation instruction to mark unknown regions;
• traversing the unknown regions to obtain a pixel of each unknown region, traversing all the sample pairs to select a sample pair with a minimum overall cost function value for the pixel of each unknown region, and calculating an alpha value corresponding to the pixel of each unknown region according to the sample pair with the minimum overall cost function value for the pixel of each unknown region;
• and
• obtaining an alpha mask image according to the alpha value corresponding to the pixel of each unknown region, and processing the alpha mask image according to the alpha value corresponding to the pixel of each unknown region to obtain a final alpha mask image.