Name
Abstract | ||
|---|---|---|
We propose a new adaptive filtering framework for local image registration, which compensates for the effect of local distortions/displacements without explicitly estimating a distortion/displacement field. To this effect, we formulate local image registration as a two-dimensional (2-D) system identification problem with spatially varying system parameters. We utilize a 2-D adaptive filtering framework to identify the locally varying system parameters, where a new block adaptive filtering scheme is introduced. We discuss the conditions under which the adaptive filter coefficients conform to a local displacement vector at each pixel. Experimental results demonstrate that the proposed 2-D adaptive filtering framework is very successful in modeling and compensation of both local distortions, such as Stirmark attacks, and local motion, such as in the presence of a parallax field. In particular, we show that the proposed method can provide image registration to: a) enable reliable detection of watermarks following a Stirmark attack in nonblind detection scenarios, b) compensate for lens distortions, and c) align multiview images with nonparametric local motion. |
Year | DOI | Venue |
|---|---|---|
2006 | 10.1109/TIP.2006.877514 | IEEE Transactions on Image Processing |
Keywords | Field | DocType |
stirmark attack,stirmark recovery,index terms—adaptive filtering,adaptive filter coefficient,new adaptive,nonparametric local motion,watermark synchronization.,nonparametric image registration,local displacement vector,adaptive filtering,local image registration,new block adaptive,local motion,2-d adaptive,image registration,local distortion,adaptive filter,adaptive filters,lens distortion,image resolution,indexing terms,system identification | Computer vision,Digital watermarking,Image processing,Pixel,Adaptive filter,Artificial intelligence,System identification,Distortion,Image resolution,Mathematics,Image registration | Journal |
Volume | Issue | ISSN |
15 | 10 | 1057-7149 |
Citations | PageRank | References |
13 | 0.85 | 22 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Gulcin Caner | 1 | 21 | 1.66 |
| A Murat Tekalp | 2 | 1893 | 201.68 |
| Gaurav Sharma | 3 | 640 | 56.64 |
| Wendi Heinzelman | 4 | 3772 | 236.43 |