Fast color-spatial feature based image retrieval methods

► Classify all of the pixels in an image into several clusters according to their colors. ► By measuring the spatial distance among the pixels in a same cluster, the three types of color spatial distribution (CSD) features of the image is obtained. ► Based on the three types of CSD features, three image retrieval methods are also provided. ► To accelerate the image retrieval methods, a fast filter is also presented to eliminate most undesired images in advance. ► A genetic algorithm is also given to decide the most suitable parameters which are used in the proposed image retrieval methods.