This is the command pfspanoramic that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
pfspanoramic - Perform projective transformations of spherical images
SYNOPSIS
pfspanoramic <source projection>+<target projection> [--width <val>] [--height <val>]
[--oversample <val>] [--interpolate] [--xrotate <angle>] [--yrotate <angle>] [--zrotate
<angle>]
DESCRIPTION
Transform spherical maps between various projections. Currently polar (latitude-
longitude), angular (light probe), mirrorball and cylindrical are supported. The syntax
for specifying the transformation is source_projection+target_projection, where
source_projection is the current mapping that source image uses and target_projection is
the projection you'd like it to be transformed to. If the projection has some optional
parameters, you can specify them with syntax: <source projection>/<argument>/...+<target
projection>/<argument>/...
As of now only angular supports a parameter - angle - which defines how many degrees from
the viewing direction the projection should cover, e.g. angular+angular/angle=180 converts
angular image to show only half of a hemisphere around the viewing direction.
OPTIONS
--width <val>, -w <val>
--height <val>, -h <val>
Make the target image respectively <val> pixels wide and/or high. If only one is
specified, the other is computed from the target projection's typical W/H ratio.
If neither is specified, the width is taken from the source image and height is
computed as above.
--oversample <val>, -o <val>
Oversample each target pixel <val>x<val> times, improving quality in areas that are
scaled down with respect to the source image. Reasonable values are 2 to 5, while
setting it higher may make the reprojection unbearably slow.
--interpolate, -i
Use bilinear interpolation when sampling the source image. Increases quality in
magnified areas.
--xrotate <angle>, -x <angle>
Rotate the spherical image <angle> degrees around X axis.
--yrotate <angle>, -y <angle>
Rotate the spherical image <angle> degrees around Y axis.
--zrotate <angle>, -z <angle>
Rotate the spherical image <angle> degrees around Z axis.
EXAMPLES
pfsin grace_probe.hdr | pfspanoramic angular+polar -i -o 3 -y 90 -w 500 | pfsout grace.hdr
Transform grace angular map to polar (latitude-longitude) projection applying
bilinear interpolation and 3x3 oversampling, while rotating it by 90 degrees around
Y axis. The image will be resized to 500x250 pixels (as the polar projection has
2:1 width-to-height ratio) and finally saved in grace.hdr.
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