Patent ID: 7529420

Claim:
A method of displaying a plurality of thumbnail images on a display unit, the method comprising: (a) storing in a storage unit a plurality of first compressed codes relating to a plurality of images, each corresponding to one of a plurality of data files of different format types, wherein each of the plurality of first compressed codes being generated by dividing one of the plurality of images into a plurality of tiles and performing discrete wavelet transform and hierarchical encoding on pixel values of the one image tile by tile, wherein each thumbnail image is capable of being generated from one of the plurality of first compressed codes by extracting different portions of the one first compressed codes; (b) setting a plurality of resolutions of the plurality of thumbnail images in accordance with the format types of the plurality of data files; (c) extracting a plurality of second compressed codes according to the plurality of resolutions from the plurality of first compressed codes stored in the storage unit to select the plurality of thumbnail images with the plurality of resolutions, wherein steps (b) and (c) are performed by a computer; and (d) displaying, in a single view, the plurality of thumbnail images based on the plurality of second compressed codes, wherein the displayed thumbnail images have different resolutions corresponding to the format types of the plurality of data files.