Method and systems for thumbnail generation, and corresponding computer program product

摘要

An embodiment of a consumer electronics product having a thumbnail display feature includes a system for generating and storing thumbnails having a given size from images, such as JPEG images, for which a spatial frequency domain representation is available. The system includes a zooming processor to reduce the size of the images by zooming. The zooming processor is configured to perform both spatial frequency domain zooming to approximate the desired thumbnail size and then image pixel domain zooming to fit the desired thumbnail size. The product includes cache storage configured to store a plurality of thumbnails in a file system as free blocks in the file system, so that file system data structures are left unchanged.

主权项

1. A method of generating a thumbnail, the method comprising:
identifying a thumbnail having a given size from an image for which a spatial frequency domain representation is available; reducing the size of said image by zooming; wherein said zooming comprises a spatial frequency domain zooming on the image to generate the thumbnail having an initial size and an image pixel domain zooming to fit said thumbnail to the given size.