منابع مشابه
DCT-based motion estimation
We propose novel discrete cosine transform (DCT) pseudophase techniques to estimate shift/delay between two one-dimensional(1-D) signals directly from their DCT coefficients by computing the pseudophase shift hidden in DCT and then employing the sinusoidal orthogonal principles, applicable to signal delay estimation remote sensing. Under the two-dimensional (2-D) translational motion model, we ...
متن کاملDCT-based subpixel motion estimation
Ut-Va Koc K. J. Ray Liu Electrical Engineering Department and Institute for Systems Research University of Maryland, College Park, Maryland 20742 [email protected] and [email protected] ABSTRACT Inter-pixel interpolation is required for most subpixel motion estimation schemes but it undesirably increases the overall complexity and data ow and deteriorates estimation accuracy. In this paper, we d...
متن کاملAdaptive overlapping approach for DCT-based motion estimation
The feedback loop for temporal prediction of traditional implementations of an MPEG-compliant video coder requires conversion of images from the spatial domain to the transform domain and then back to the spatial domain due to the restriction of motion estimation schemes performed only in the spatial domain, severely limiting the throughput of the coder. However, availability of the low-complex...
متن کاملSubpixel motion estimation in DCT domain
Currently existing subpixel motion estimation algorithms require interpolation of inter-pixel values. However, it is shown in this paper that, by introducing the concept of pseudo phase shifts in DCT coeecients of a moving object's intensity, subpixel displacements can be estimated on two consecutive frames in DCT domain without interpolating inter-pixel values. Speciically, under a certain con...
متن کاملDct-based Subpixel Motion Compensation and Fully
The feedback loop for temporal prediction of traditional implementations of an MPEG-compliant video coder requires conversion of images from the spatial domain to the transform domain and then back to the spatial domain due to the restriction of motion estimation schemes performed only in the spatial domain, severely limiting the throughput of the coder. However, it was shown that the low-compl...
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ژورنال
عنوان ژورنال: IEEE Transactions on Image Processing
سال: 1998
ISSN: 1057-7149,1941-0042
DOI: 10.1109/83.701146