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

[Shlomo Kashani]

Hi Martin,
There are several ways to approximate the exp() function. I think it would
be best if you read a paper about it instead of me quoting it here:

http://www.restena.lu/convict/Jeunes/ultimate_stuff/exp_ln_2.htm
http://www.research.scea.com/research/pdfs/RGREENfastermath_GDC02.pdf

What is the range of your input to the exp() function? 
You can use a LUT or use one of the on the fly approximations mentioned in
these articles.

All the best,
Shlomo.

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