[Radiance-general] how to use pfilt to perform anti-aliasing

[Ji Zhang]

Dear Radiance experts,

I use pfilt to treat a .hdr image generated by rpict command.

However, the the pfilt doesn't seem to have any impact in terms of
anti-aliasing of the image.

The pfilt command I used is:
pfilt -x 1024 -y 1024 -e 1 -r 0.55 ./direct_sunlight.hdr > test.hdr

the original .hdr image (saved as png file) is:
http://i1143.photobucket.com/albums/n633/oatcracker/Radiance/direct_sunlight.png

the output .hdr of the pfilt (saved as png file) is:
http://i1143.photobucket.com/albums/n633/oatcracker/Radiance/output_of_pfilt.png


Can you kindly tell me if I'm using pfilt correctly to perform
anti-aliasing?

Thanks!
Ji
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