This application relates to an image segmentation method and apparatus. The method includes obtaining a current frame and historical affine transformation information transmitted by a previous video frame in a video frame sequence; performing affine transformation on the current frame according to the historical affine transformation information to obtain a candidate region image corresponding to the current frame; performing feature extraction on the candidate region image to obtain a feature map corresponding to the candidate region image; performing semantic segmentation based on the feature map to obtain a segmentation result corresponding to a target in the current frame; and revising the historical affine transformation information according to the feature map to obtain updated affine transformation information, and using the updated affine transformation information as historical affine transformation information corresponding to a subsequent video frame in the video frame sequence.