Reverse image search
Reverse image search is a Content-based image retrieval(CBIR) query technique that involves providing the CBIR system with a sample image that it will then base its search upon; in terms of Information retrieval, the sample image is what formulates a search query. In particular, the reverse image search is characterized by a lack of search terms. This effectively removes the need for a user to guess at keywords or terms that may or may not return the correct result. A reverse image search also allows users to discover content that is related to a specific sample image, popularity of an image , and discover manipulated versions and derivative works. Google's Search by Image is a feature that uses a reverse image search and allows users to search for related images just by uploading an image or image URL. Google accomplishes this by analyzing the submitted picture and constructing a mathematical model of it using advanced algorithms. It is then compared with billions of other images