Title :
Blur determination in the compressed domain using DCT information
Author :
Marichal, X. ; Wei-Ying Ma ; HongJiang Zhang
Author_Institution :
Lab. de Telecommun., Univ. Catholique de Louvain, Belgium
Abstract :
The paper presents a simple yet robust measure of image quality in terms of global (camera) blur. It is based on histogram computation of non-zero DCT coefficients. The technique is directly applicable to images and video frames in compressed (MPEG or JPEG) domain and to all types of MPEG frames (I-, P- or B-frames). The resulting quality measure is proved to be in concordance with subjective testing and is therefore suitable for quick qualitative characterization of images and video frames.
Keywords :
data compression; discrete cosine transforms; image coding; DCT; MPEG frames; blur determination; histogram computation; image quality; non-zero DCT coefficients; Cameras; Discrete cosine transforms; Histograms; Image analysis; Image coding; Image edge detection; Image restoration; Transform coding; Video compression; Video sequences;
Conference_Titel :
Image Processing, 1999. ICIP 99. Proceedings. 1999 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-7803-5467-2
DOI :
10.1109/ICIP.1999.822923
