next up previous contents
Next: The discrete wavelet transform Up: Morlet's Wavelet Previous: Morlet's Wavelet

Mexican Hat

The Mexican hat defined by Murenzi [30] is:
$\displaystyle g(x) = (1 - x^2) e^{-\frac{1}{2}x^2}$     (14.8)

it is the second derivative of a Gaussian (see figure 14.2).
  
Figure 14.2: Mexican Hat
\begin{figure}
\centerline{
\hbox{\psfig{figure=fig_mexicain.ps,bbllx=1cm,bblly=13.5cm,bburx=10.5cm,bbury=27cm,height=5cm,width=10cm,clip=}
}}
\end{figure}



http://www.eso.org/midas/midas-support.html
1999-06-15