1. An image processing method, comprising: reading a video consisting of a plurality of image frames from a storage device of an image processing device; reading pixel information of an edge row of each image frame; determining a stable region along a Y-axis direction in each image frame according to the pixel information of the edge row; aligning all the image frames according to the stable region along the Y-axis direction in each image frame, and trimming all the image frames by cutting additional image regions except for the stable region along the Y-axis direction in each image frame, to reduce a shaking degree of each image frame along the Y-axis direction; and displaying stable playback of the video consisting of the aligned and trimmed image frames.