Due to rapid development of the web and its related technologies, the web has become popular among all sections of the society. The web is used by different users to make their services available globally. It is the topic of many research activities. An interesting area in it is to retrieve images from the web on diverse topics. The study of image search is very useful to the web user community. There are many areas of its applications and those who use it would be interested in identifying similar web images as in fraud detection system, diagnosing Bio-medical images, analyzing the geographical images from the satellite, classifying objectionable images, copy right violations etc. The web has provided a platform to connect people and share their information. Due to extensive use of digital cameras, numerous images are currently available over the Internet for web searching and browsing. The huge amount of digital images presents challenges to the current techniques for organizing and searching images. As a result, there is a demand for developing new and more efficient algorithms for image searching on the web.