Furthermore, most CBIR projects today tend to be Web-based. By contrast, many project were based on client appHcations in the 1990s. These Web-based CBIR tools will have significant influence on digital libraries or repositories, as most of them are also Web-based. Particularly in the age of Web 2.0, some large digital repositories—such as Flickr for images and YouTlibe and Google Video for video—are changing people's daily lives. The implementation of CBIR will be a great benefit to millions of users.