[Insight-users] "Look-up-table" suggestion

[Shlomo Kashani]

Hi,
I am sorry that the on the fly approximation didnt work for you. I found
this link:
http://www.quinapalus.com/efunc.html

which uses the well known CORDIC algorithm to generate an exponential
function approximation. I manually followed the example there (since it was
so interesting) and It actually worked very well.

It should be faster than direct calculation and there are plenty of C/C++
implementations on the web. I know it takes time but I am in the same boat
(trying to find/implement a 2D Gabor wavelet in C++) 

read that paper and write again when you are done. I shall be happy to help
you again. 

Shlomo Kashani.   


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