| Title |
Effective Histogram Extraction Scheme for Histogram-Based Image Processing |
| Authors |
박준형(Park Jun-Hyung) ; 엄민영(Eom Min-Young) ; 최윤식(Choe Yon-Sik) ; 남재열(Nam Jae-Yeal) ; 원치선(Won Chee-Sun) |
| Keywords |
Histogram ; Fast Extraction ; Compressed Domain ; DCT ; Decoding |
| Abstract |
Due to development of internet network environments and data compression techniques, the size and amount of multimedia data has greatly increased. They are compressed before transmission or storage. Dealing with these compressed data such as video retrieval or indexing requires decompression procedure in most cases. This causes additional computations and increases the processing time. In various applications a histogram is one of the most frequently used tools. Efficiency of extracting such histograms will drop down if decompression is involved. We propose a novel scheme for extracting histograms from images that are transformed into the compressed domain by 8x8 DCT(Discrete Cosine Transform). In this scheme an averaged version of original image is obtained by a simple linear combination of DCT coefficients with the sets of coefficients we designed. |