JPEG Image Retrieval Algorithm Based on DCT Compression
Hong Bao · Jisuanji gongcheng · 2010
This paper proposes a JPEG image retrieval algorithm.After entropy decoding,the difference of DC coefficients is becoming binary data.According to the character,the DC vector is introduced to embody the gray distribution of the original image.The AC coefficients of the distribution are taken into account and nine AC coefficients are chosen to extract the AC distribution vector.Experimental results show that the proposed method has a good performance in retrieval efficiency.