The image retrieval based on transform domain

Due to the most of popular algorithms based on image retrieval have a large calculation. While the method of DCT domain have less calculation, and compatible with international popular standard of data compression (JPEG、MPEG、H261/263). So this paper proposes an image retrieval method based on DCT compression. First, we can extract the feature vector of the image through the DCT transform, and then set up characteristic databases, finally through matching the feature vector of the normalized correlation coefficient (NC) to realize the image retrieval. The results show that this method can not only reduce the database storage space occupied, but also can effectively resist the conventional attacks and geometrical attacks, has strong robustness. Keywords-image retrieval; DCT; feature vector; normalized correlation coefficient; robustness.