ABSTRACT
As shrunk versions of pictures, thumbnails are commonly used in image preview, organization, and retrieval [1], [2], [3], [4]. In the age of digital media, a thumbnail plays a similar role for an image as an abstract does for an article. Just consider today’s digital cameras; it is hard to find one with less than six Megapixels. Viewers expect to observe both the global composition and important perceptual features of the original full-size picture by
inspecting its thumbnail, which should thus provide a faithful impression about the image content and quality.
