Image Retrieval Based on Combined features of DCT and Shape Descriptor

In the image retrieval technology, the aim is to retrieve an image based on combined features of DCT color coefficients and shape descriptor. There were many algorithms based on single feature and combined features, presented in past. Those algorithms have lack of speed and require more computational capability. In this algorithm by combining two features of image, most similar images are retrieved. The idea of DCT was to decouples the color component of image using YCbCr and transform these into DCT coefficients and measure the similarity moreover extract the region based shape descriptor to calculate central moment of an image with the help of edge information and morphological operations to find normalized feature vectors. Now, calculate similarity with combined features of quantized DCT color coefficients and normalized feature vectors to retrieve an image.