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sugr_get_chirality_Homography_2D

PURPOSE

% etermines chirality of quasi affine homography (within disk)

SYNOPSIS

function chi = sugr_get_chirality_Homography_2D(H)

DESCRIPTION

% etermines chirality of quasi affine homography (within disk)
 chirality of quasi affinity +-1 or 0 = undefined

 chi = sugr_get_chirality_Homography_2D(H,radius)


 Wolfgang Förstner
 wfoerstn@uni-bonn.de

 wf 2/2011

CROSS-REFERENCE INFORMATION

This function calls:

sugr_get_isquasiaffine_Homography_2D % Test whether homography is quasi affine

This function is called by:

sugr_show_Homography_2D % sugr_show_Homography_2D(H)

SOURCE CODE

0001 %% etermines chirality of quasi affine homography (within disk)
0002 % chirality of quasi affinity +-1 or 0 = undefined
0003 %
0004 % chi = sugr_get_chirality_Homography_2D(H,radius)
0005 %
0006 %
0007 % Wolfgang Förstner
0008 % wfoerstn@uni-bonn.de
0009 %
0010 % wf 2/2011
0011 
0012 function chi = sugr_get_chirality_Homography_2D(H)
0013 
0014 if sugr_get_isquasiaffine_Homography_2D(H)
0015             chi = sign(H.H(3,3)); 
0016 else
0017     chi = 0;
0018 end