Panoramic stitching method for infrared images of wind turbine blade, device, storage medium, and product

A panoramic stitching method for infrared images of a wind turbine blade, wherein the stitching method comprises:

• obtaining a plurality of frames of visible images and infrared images of the wind turbine blade, wherein each frame of visible image corresponds to each frame of infrared image, and two adjacent frames of images overlap each other;
• performing coarse registration on each frame of visible image and infrared image to obtain an infrared image that is coarsely registered with the visible image;
• separately performing background subtraction on a coarsely-registered visible image and a coarsely-registered infrared image to obtain a foreground mask visible image, a foreground mask infrared image, a background-subtracted blade visible image, and a background-subtracted blade infrared image;
• performing fine registration on the foreground mask visible image and the foreground mask infrared image to obtain a relative displacement during the fine registration between the foreground mask visible image and the foreground mask infrared image;
• stitching a plurality of frames of background-subtracted blade visible images to obtain a pixel increment when two adjacent frames of blade visible images are stitched;
• calculating, based on the relative displacement and the pixel increment when two adjacent frames of blade visible images are stitched, a pixel increment when two corresponding adjacent frames of blade infrared images are stitched;
• and
• stitching, based on the pixel increment when two adjacent frames of blade infrared images are stitched, two corresponding adjacent frames of background-subtracted blade infrared images, to obtain an infrared panoramic image of the wind turbine blade.