[Insight-users] an interesting problem

[Guorong Wu]

hello all:
	I found an interesting problems. 
	Class MultiResolutionPDEDeformableRegistration provides a generic framework to perform multi-resolution deformable registration. But the default registration filter is DemonsRegistrationFilter. As we known, DemonsRegistrationFilter, SymmetricForcesDemonsRegistrationFilter and LevelSetMotionRegistrationFilter are all derived from PDEDeformableRegistrationFilter. So if we change the default type of registrationfilter we can perform other PEDDeformable algorithms in multi-resolution framework. But when I change the type definition (line 122, itkMultiResolutionPDEDeformableRegistration.h) to LevelSetMotionRegistrationFilter, an exception occurs when called m_Registration->UpdateLargestPossibleRegion() (at line 310, MultiResolutionPDEDeformableRegistration.txx). The funny is the program sometimes stoped after completed one level (m_CurrentLevel==0) or sometimes stoped after completed two levels. During the test, the fixed image, the moving image, NumberOfLevel, NumberOfIteration are the same. Would you like to have a test and give me some suggestions?	I am eager to know to the answer. Thanks.	

　　　　　　　　Guorong Wu
　　　　　　　　grwu at sjtu.edu.cn
　　　　　　　　　　2004-08-03

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Guorong Wu	
The Department of Computer Science and Technology
Shanghai Jiao Tong University
1954 Huashan RD
Shanghai China    
200030
Tel:  +86 21 3226 1236  , 6293 2089
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