Denoising

**Figure 1:** MRI image of brain. Original data set (not shown here) from Bernard Coombs, U. Colorado HSC, Denver.
$\begin{figure} {\epsfxsize=6in \epsfbox{denoise.eps} } \end{figure}$

Idea

Noise is "rapidly varying" (high frequency) information. Try to separate low and high frequency information.

The Fourier and wavelet transform.

Next: Enhancement (enhance features) Up: Mathematical Methods in Image Previous: Mathematical Methods in Image

Kristian Sandberg
2001-11-19