Method for recombining image file

The invention discloses a method for recombining an image file. A to-be-recombined image file comprises coding data of a plurality of images coded according to a high efficiency video coding standard.Each image comprises a plurality of image tiles. The coding data of each image comprises a plurality of data slices and a plurality of parameters sets. The method for recombining the image file comprises the steps of receiving the to-be-recombined image file; analyzing the plurality of parameters sets in the to-be-recombined image file; taking out a plurality of pieces of interest image data corresponding to regions of interest of each image from the data slices according to the parameters sets; updating the parameters sets to obtain a plurality of updated parameters sets; and generating a recombined image file according to the interest image data and the updated parameter sets. The plurality of image tiles of each image belong to a motion-constrained tile set defined by the high efficiency video coding standard.