[Insight-users] landmark initialized mutual information regis tration

[Miller, James V (Research)]

I don't know that the exception is but 4 landmarks sounds low
for an affine transform. Have you tried running with more landmarks?


-----Original Message-----
From: raghu venkatram [mailto:raghu_420 at hotmail.com]
Sent: Tuesday, July 27, 2004 3:28 PM
To: luis.ibanez at kitware.com; hussaintameem at gmail.com;
Insight-users at itk.org
Subject: [Insight-users] landmark initialized mutual information
registration



Hi All,

I am running the land mark initialized mutual information based registration

application.
I am trying to register an MR and a CT volume,

MR volume: 256x256x74 (.89844 mm x .89844 x 2mm)
CT volume: 512 x 512x55 ( ..55469 x .55469 x 2mm) voxel sizes

I get some strange runtime errors, while initializing with 4 landmark 
points.
below is the log with osme of my debugging echo statements. I also get a 
Debug error MS VC++ error: Damage: after normal block #7071.

I would be glad if somebody could give me some pointers or had similar 
experiences.

Thanks,
Raghu

Registration begins.
Register using landmarks
fixed landmarks=4
moving landmarks=4
68.2813 105.117 72
111.406 63.7891 72
143.75 110.508 72
108.711 148.242 72
141.445 155.867 43.8203
115.375 127.023 43.8203
0 0 0
171.953 128.688 43.8203
centers
428.773 411.578 131.461
432.148 427.656 288
centers
107.193 102.895 32.8652
108.037 106.914 72
0 0 0
LandmarkRegistrator: InitialParameters =
[0, 0, 0, 107.193, 102.895, 32.8652]
-------------------------------------------------
Exception caught in LandmarkRegistrator:
unknown exception caught !!!
-------------------------------------------------
-------------------------------------------------
Exception caught in ImageRegistrationApp:
unknown exception caught !!!
-------------------------------------------------
DEBUG: Landmark registration FINAL centered versor transform:
[0, 0, 0, 0, 0, 0]
DEBUG: Landmark registration FINAL affine transform:
[1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0]

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