Fix comments for postalignment function

1 files changed, 9 insertions, 3 deletions

diff --git a/matlab/tools/astra_geom_postalignment.m b/matlab/tools/astra_geom_postalignment.m
index c16f8ed..c85a7a0 100644
--- a/matlab/tools/astra_geom_postalignment.m
+++ b/matlab/tools/astra_geom_postalignment.m
@@ -5,9 +5,15 @@ function proj_geom = astra_geom_postalignment(proj_geom, factor)
 %
 % Apply a postalignment to a vector-based projection geometry.  Can be used to model the rotation axis offset.
 %
+% For 2D geometries, the argument factor is a single float specifying the
+% distance to shift the detector (measured in detector pixels).
+%
+% For 3D geometries, factor is a pair of floats specifying the horizontal
+% resp. vertical distances to shift the detector.
+%
 % proj_geom: input projection geometry (vector-based only, use astra_geom_2vec to convert conventional projection geometries)
-% dim (optional): which dimension
-% s: output
+% factor: number of pixels to shift the detector
+% proj_geom: output
 %--------------------------------------------------------------------------
 % This file is part of the ASTRA Toolbox
 %
@@ -33,4 +39,4 @@ function proj_geom = astra_geom_postalignment(proj_geom, factor)
 		error('Projection geometry not suited for postalignment correction.')
 	end
 
-end
\ No newline at end of file
+end