A method includes: obtaining video data; receiving a target object; processing the video data to obtain one or more first images of the video data that contain an image of the target object and one or more second images of the video data that do not contain the image of the target object; discarding the one or more second images from the video data; generating a background image based on the one or more second images; synthesizing the one or more first images of the video data with the background image to generate one or more synthesized images; obtaining a target image sequence with the one or more synthesized images based on a time order of the one or more first images in the video data; and displaying each of the one or more synthesized images in the target image sequence in a fade-in and fade-out manner.