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Noise reduction of image sequences using motion compensation and signal decomposition

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3 Author(s)
Kleihorst, R.P. ; Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands ; Lagendijk, R.L. ; Biemond, J.

In this paper, a new spatio-temporal filtering method for removing noise from image sequences is proposed. This method combines the use of motion compensation and signal decomposition to account for the effects of object motion. Because of object motion, image sequences are temporally nonstationary, which requires the use of adaptive filters. By motion compensating the sequence prior to filtering, nonstationarities, i.e., parts of the signal that are momentarily not stationary, can be reduced significantly. However, since not all nonstationarities can be accounted for by motion, a motion-compensated signal still contains nonstationarities. An adaptive algorithm based on order statistics is described that decomposes the motion-compensated signal into a noise-free nonstationary part and a noisy stationary part. An RLS filter is then used to filter the noise from the stationary signal. Our new method is experimentally compared with various noise filtering approaches from literature

Published in:

Image Processing, IEEE Transactions on  (Volume:4 ,  Issue: 3 )

Date of Publication:

Mar 1995

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