Knee joint cartilage segmentation method, device, equipment and medium

The embodiment of the invention relates to a knee joint cartilage segmentation method and device, equipment and a medium. The method comprises the steps that a target MR image and a corresponding target CT image of a knee joint of a user are acquired; the target CT image has a corresponding first hard bone label, determining a second hard bone label of the target MR image based on the first hard bone label and a target deformation field between the target CT image and the target MR image, and obtaining a target map matched with the target MR image from a plurality of candidate maps in a preset map database, and processing based on the second hard bone tag and the cartilage tag of the target map, determining a segmentation region of interest of the target MR image, obtaining a plurality of template image blocks in the segmentation region of interest, determining a tag value of the target MR image according to a tag value of each template image block, and obtaining a segmentation result of the target MR image.