Polar (Circular) projection to Equirectangular projection

pompandclout's picture

Hey all, new here, been lurking a bit.

Trying to solve a simple need in QC:

I want to take a circular panorama image, and do what's effectively a "polar coordinates" filter to it in Photoshop terms. This will effectively flatten it. Ref images attached. Any easy way to do this? thx!

PreviewAttachmentSize
circ.png
circ.png1.54 MB
equir.png
equir.png1.6 MB

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benoitlahoz's picture
Re: Polar (Circular) projection to Equirectangular projection

Polar To Cartesian and Cartesian To Polar CI Filter are what you need. Can't remember if they are in QC by default though.

If not I can post them here when I'll be on a computer.

jrs's picture
Re: Polar (Circular) projection to Equirectangular projection

Please post - and do you have a CI filter for going back the other way as well?

benoitlahoz's picture
Re: Polar (Circular) projection to Equirectangular projection

I found them again. Here are the CIFilters: https://machinesdontcare.wordpress.com/2009/07/02/borg-2d-polar-mapping/

Thanks to Toneburst.