L. Haldurai, V. Vinodhini
A database is a collection of information that is organized for easy storage, retrieval and update. This information is represented in many forms like text, table, image, chart and graph etc. here we concentrate on information that is stored in the form of images. Content based image retrieval (CBIR) technique explores various methodologies in extracting implicit knowledge, patterns and relationships found in the images from the collection of images. This paper focuses on various techniques that were proposed in earlier literature.