Image Retrieval Based on DCT Compressed-Domain
Shen Lan-sun · Dianzi xuebao · 2002
In this paper,An image retrieval method is proposed based on DCT compressed-domain.With the partial decoding of DCT-encoded image data, the image features are extracted directly from the compressed domain. At first, reorder the DCT parameters in compressed-domain to get the directionality and multi-resolution for extracting the sketch of image. And then retrieved images by the CRH (Connected-Region Histogram) of image sketch. At last, we can sort the retrieved result by the gray histogram of DC map. The method is robust to gray,rotation,translation,and so on.The experimental results show that the proposed method is effective in image retrieval.