Hello,
my name is Lucas Fascione, I work for Weta Digital (the guys from The
Lord of the Rings and King Kong).
I'm using your dht code to transform some data I need to convolve.
In trying to understand how many samples of my function I needed I
conducted the following experiment:
- I generated a dht class with fixed maximum value and various sample
counts (128, 256, 512, 1024, 2048)
- I transformed and plotted the various datasets
I was very surprised when I realized the transformed dataset doesn't
seem to converge to a defined target value,
but keeps lowering in magnitude instead.
Here is a gnuplot expression to plot my transformed datasets so that
they (almost) overlap:
plot "trans.2048.dht0.dat" using ($1):(log($2)) with linespoints,
"trans.1024.dht0.dat" using ($1):(log($2/2.8)) with lines,
"trans.512.dht0.dat" using ($1):(log($2/8)) with lines,
"trans.256.dht0.dat" using ($1):(log($2/23)) with lines,
"trans.128.dht0.dat" using ($1):(log($2/63)) with lines
Any insight you could spare on the situation would be highly appreciated.
Thank you
Luca Fascione
--
Luca Fascione
Software Engineer - Weta Digital
Phone: +64 4 380 9864 (x4744)
Mobile: +64 21 0764 862
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