afni.nimh.nih.gov
AFNI Message Board
Dear AFNI users-
We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
Sincerely, AFNI HQ
We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
https://discuss.afni.nimh.nih.gov
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
Sincerely, AFNI HQ
| January 03, 2019 05:41AM | |
Hi Daniel,
Thank you!
I seem to have found an easy way to do the inversion:
As mentioned before, I got the deobliqued dataset using the code:
When I open the card+orig.HEAD file now, I find two new attributes that are different from the attributes in OriginalAnatomy+orig.HEAD:
I think WARPDRIVE_MATVEC_INV_000000 is the attribute of inversion matrix.
And I can transform card+orig back to match OriginalAnatomy+orig using these codes:
Unfortunately, the afni GUI say reoblique+orig and OriginalAnatomy+orig still have an angle difference of 9.835 degrees.
This warning makes me very sad !!
So I compare the matrix outputted by 3dWarp -verb and the matrix stored in card+orig.HEAD for checking:
This makes me very confused!
Because I thought the matrix outputted by 3dWarp -verb is the forward matrix. It is unexpectedly the same as the inversion matrix stored in the HEAD file now.
What do you think?
Yu
Edited 10 time(s). Last edit at 01/03/2019 07:13AM by Zhang Yu.
Thank you!
I seem to have found an easy way to do the inversion:
As mentioned before, I got the deobliqued dataset using the code:
3dWarp -oblique2card -prefix card OriginalAnatomy+orig.
When I open the card+orig.HEAD file now, I find two new attributes that are different from the attributes in OriginalAnatomy+orig.HEAD:
type = float-attribute
name = WARPDRIVE_MATVEC_FOR_000000
count = 12
0.9955035 -0.03815642 0.08670011 1.430454 0.05067991
0.9878103 -0.1471824 -17.53901 -0.0800273 0.1509146
0.9853023 28.11709
type = float-attribute
name = WARPDRIVE_MATVEC_INV_000000
count = 12
0.9955035 0.05067991 -0.0800273 1.714989 -0.03815642
0.9878101 0.1509145 13.13652 0.08670011 -0.1471824
0.9853022 -30.40928
I think WARPDRIVE_MATVEC_INV_000000 is the attribute of inversion matrix.
And I can transform card+orig back to match OriginalAnatomy+orig using these codes:
cat_matvec card+orig::WARPDRIVE_MATVEC_INV_000000 > inverion.1D
3dAllineate -1Dmatrix_apply inversion.1D -prefix reoblique+orig -source card+orig -master OriginalAnatomy+orig
Unfortunately, the afni GUI say reoblique+orig and OriginalAnatomy+orig still have an angle difference of 9.835 degrees.
This warning makes me very sad !!
So I compare the matrix outputted by 3dWarp -verb and the matrix stored in card+orig.HEAD for checking:
3dWarp -verb -oblique2card -prefix card OriginalAnatomy+orig. >forward_verb.1D
cat_matvec -ONELINE forward_verb.1D
0.995503 0.05068 -0.080027 1.71499 -0.038156 0.98781 0.150915 13.1365 0.0867 -0.147182 0.985302 -30.4093
cat_matvec -ONELINE card+orig::WARPDRIVE_MATVEC_FOR_000000
0.995503 -0.0381564 0.0867001 1.43045 0.0506799 0.98781 -0.147182 -17.539 -0.0800273 0.150915 0.985302 28.1171
cat_matvec -ONELINE card+orig::WARPDRIVE_MATVEC_INV_000000
0.995503 0.0506799 -0.0800273 1.71499 -0.0381564 0.98781 0.150915 13.1365 0.0867001 -0.147182 0.985302 -30.4093
This makes me very confused!
Because I thought the matrix outputted by 3dWarp -verb is the forward matrix. It is unexpectedly the same as the inversion matrix stored in the HEAD file now.
What do you think?
Yu
Edited 10 time(s). Last edit at 01/03/2019 07:13AM by Zhang Yu.
| Subject | Author | Posted |
|---|---|---|
|
Zhang Yu | December 25, 2018 12:42AM |
|
Daniel Glen | December 31, 2018 01:32PM |
|
Zhang Yu | January 03, 2019 05:41AM |
|
Daniel Glen | January 03, 2019 06:40PM |
|
Zhang Yu | January 05, 2019 12:16PM |
|
Daniel Glen | January 08, 2019 05:40PM |
|
Zhang Yu | January 18, 2019 10:24AM |
|
Daniel Glen | January 18, 2019 06:33PM |
