1. An image processing method comprising: extracting edges from each original image of a plurality of original images, thereby obtaining an edge image; extracting straight lines from the edge image, thereby obtaining line images; determining extensions of the straight lines of the line images and setting a vanishing point based at least in part on the extensions; and trimming each original image of the plurality of original images so that a position of the vanishing point of each original image of the plurality of original images matches with a position of a vanishing point of each other original image of the plurality of original images, thereby obtaining a final image corresponding to each original image.