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25 October 2004 DCT-domain image registration techniques for compressed video
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Proceedings Volume 5600, Multimedia Systems and Applications VII; (2004)
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States
An image registration technique for compressed video such as motion JPEG or the I picture of MPEG based on the matching of DCT (Discrete Cosine Transform) coefficients is investigated in this research. Several simple features such as the DC value and a couple of low-frequency AC coefficients in the DCT domain are first extracted to indicate the edge strength and orientation inside each block for the image alignment purpose. Next, we conduct a coarse-level image segmentation task to filter out irrelevant regions. Then, for the regions of interest, we perform a more detail analysis to get the edge map. Finally, the alignment parameters are determined based on the information contained by the edge map. It is shown by experimental results that the proposed method reduces the computational cost of image registration dramatically as compared with the pixel domain registration technique while achieving certain quality of composition.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ming-Sui Lee, Meiyin Shen, and C.-C. Jay Kuo "DCT-domain image registration techniques for compressed video", Proc. SPIE 5600, Multimedia Systems and Applications VII, (25 October 2004);


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