pfspanoramic(1) 					      General Commands Manual						   pfspanoramic(1)

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 cylindri-
       cal are supported. The syntax for specifying the transformation is source_projection+target_projection, where source_projection is the cur-
       rent 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.

SEE ALSO

       pfsin(1) pfsout(1)

BUGS

       Please report bugs and comments to Miloslaw Smyk <thorgal@wfmh.org.pl>.

																   pfspanoramic(1)