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  Searching images on google is not as efficient as text searching . Google is here with an answer with a new technology which promises to use visual cues in the images themselves to rank their relevance.
Google has come up with a technology named VisualRank, which is somewhat similar to its own PageRank system for prioritizing Web page search results but that provides a visually based ranking of images instead.
They tested VisualRank in a series of experiments retrieving images for 2,000 of the most popular products queries, including “iPod” and “Xbox.” Their results showed a dramatic improvement over those obtained using text-based searches, they said.
In their paper, they proposed a way to create graphs of inferred visual similarity for a group of images. To determine which images are most relevant to a query, they analyze what they call “authority” nodes through an iterative procedure — much like in PageRank computations — that assigns a numerical weight to each image, representing its relative importance to the other images being considered.For more information click the link below
