Equirectangular to Gnomonic and back - for VR filmmaking

[johnvanvliet]

--- EDITED to remove g.project -----

you will likely find that using a cube environmental map will work a bit better than one in SimpleCylindrical

unless some EXTREME care is taken , there will be noticeable image errors at the top/bottom ( north/south poles)

seeing as this is for a VR set up
i am betting you already are using Blender or 3dStudio

Hugin should be able to stitch together individual images and remap that to a SimpleCylindrical environmental map

as to undoing the image in the top post
converting it into 3 images
--
top
middle ( many images centered on the area you are working on )
bottom
--
and then remapping it back
i use gis software normally and that can be a bit COMPLEX to use

G.Projector can only change stuff from equirectangular,

that is why i have not been using it


However
for simple editing "The Gimp" has a nice tool "polar projection "
this is VERY handy for the top and bottom of that image

You can remove the tripod from the image
the filter
filters / distorts / polar coordinates



now there is a old'ish bit of software called
"Matthew's Map Projection Software"
http://www.users.globalnet.co.uk/~arcus/mmps/

for somethings it works great , others???? not so much

your image in the first post can be remapped in the terminal
the input HAS to be in PPM format , i renamed it for ease of use

-- the Southpole

project stereographic -w 500 -h 500  -long 0 -lat -90  -f 1.ppm > 2.ppm

or the added animation of the girl

project stereographic -w 500 -h 500  -long -72 -lat -2  -f 1.ppm > 3.ppm