Dear Freesurfers,
I tried to map a single subject surface to fsaverageX (for the sake of demonstration lets take fsaverage6). I did the following: mri_surf2surf --hemi lh --srcsubject $s --sval-xyz white --trgsubject fsaverage6 --tval-xyz --tval ./lh.white.ico6 This produces a surface that seems systematically shifted (see figure). Also the newly generated surface does not contain valid geomery information (see mris_info print of lh.white and lh.white.ico6). Is there a way to fix this?
Another question: is there a reason why mris_decimate is not included in the freesurfer-Darwin-snowleopard-i686-stable-pub-v5.3.0 build
Any help is very much appreciated. Best, Franz
mris_info $s/surf/lh.white
SURFACE INFO ======================================== type : MRIS_TRIANGULAR_SURFACE=MRIS_ICO_SURFACE num vertices: 118611 num faces : 237218 num strips : 0 surface area: 77595.6 AvgVtxArea 0.654202 AvgVtxDist 0.885026 StdVtxDist 0.251941 ctr : (-33.3535, -11.9536, 42.7693) vertex locs : surfaceRAS talairch.xfm: 1.045 -0.093 -0.014 1.081; 0.099 1.095 0.070 -4.263; 0.010 -0.083 1.290 -41.092; 0.000 0.000 0.000 1.000; surfaceRAS to talaraiched surfaceRAS: 1.045 -0.093 -0.014 1.177; 0.099 1.095 0.070 13.377; 0.010 -0.083 1.290 -49.756; 0.000 0.000 0.000 1.000; talairached surfaceRAS to surfaceRAS: 0.949 0.081 0.006 -1.900; -0.085 0.902 -0.050 -14.449; -0.013 0.058 0.772 37.650; 0.000 0.000 0.000 1.000; volume geometry: extent : (256, 256, 256) voxel : ( 1.0000, 1.0000, 1.0000) x_(ras) : (-1.0000, -0.0000, 0.0000) y_(ras) : (-0.0000, 0.0000, -1.0000) z_(ras) : ( 0.0000, 1.0000, -0.0000) c_(ras) : ( 0.0989, 0.9660, 0.9027) ...
mris_info lh.white.ico6
SURFACE INFO ======================================== type : MRIS_TRIANGULAR_SURFACE=MRIS_ICO_SURFACE num vertices: 40962 num faces : 81920 num strips : 0 surface area: 75477.4 AvgVtxArea 1.842620 AvgVtxDist 1.573724 StdVtxDist 0.523314 ctr : (-33.3983, -12.0872, 42.7743) vertex locs : surfaceRAS volume geometry info is either not contained or not valid. ...
