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

[Compagnon Raphaël]

you are right!
________________________________________
De : Ji Zhang [hope.zh at gmail.com]
Date d'envoi : mardi, 14. juin 2011 13:16
À : Radiance general discussion
Objet : Re: [Radiance-general] RE : how to use pfilt to perform anti-aliasing

Dear Raphael,

Thanks for your prompt reply and advice!

Does this mean that I may need to bear in mind that the size of the image to be produced by rpict should always be 3 times bigger than the size of the final image I want?

Cheers, Ji



2011/6/14 Compagnon Raphaël <Raphael.Compagnon at hefr.ch<mailto:Raphael.Compagnon at hefr.ch>>
Hi

To perform anti-aliasing you need to reduce your final image size (typically by a factor 3).
Hence your pfilt comand should be:

pfilt -x /3 -y /3 -e 1 -r 0.55 ./direct_sunlight.hdr > test.hdr

Raphael
________________________________________
De : Ji Zhang [hope.zh at gmail.com<mailto:hope.zh at gmail.com>]
Date d'envoi : mardi, 14. juin 2011 08:36
À : Radiance general discussion
Objet : [Radiance-general] how to use pfilt to perform anti-aliasing

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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