pfspanoramic - Online in the Cloud

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.

Use pfspanoramic online using onworks.net services