The SGC Classification
of family of image-registration techniques is
determined based on
the warp performance on a group of data sets.
You need to have executed "WT_IWT" and "wave_space_varThresh" first
before you call "SGC_CWT", if wavelet-space analysis is
to be done!
This WAIR command is used to obtain the Spread Group
Classification (SGC) and the induced warp ranking having a family
of warps applied to a group of data sets. For example, if we need
to quantify warp performance, based on m subjects, each
scanned under k different activation paradigms, and we wish to
see large spread between the groups of m images, for the
various functional activation stimuli, then we use the SGC analysis
separately for every warp.
[ [x_k_Dim_Size] ]
- where the following definitions are used:
- the number of the data sets (m)
- the total number of activation paradigms, applied to all
- the total number of "base-line" activations. If no paradigm is
being repeated, put 1
- the total number of dimensions of your data
- the the size of the first (fastest varying index) dimension
of the data. Remember, all dimension sizes need to be
powers of 2
- the the size of the k-th dimension of the data
- The (thresholded) wavelet transform of the
data "i" under the activation paradigm "j",
- file that will contain the output of the SGC analysis for the
particular image registration
./SGC_CWT 3 2 1 3 128 128 64 ./WTpet1_freq1_warp1_12812864.img ./WTpet1_freq2_warp1_12812864.img ./WTpet2_freq1_warp1_12812864.img ./WTpet2_freq2_warp1_12812864.img ./WTpet3_freq1_warp1_12812864.img ./WTpet3_freq2_warp1_12812864.img ./results_SGC_CWT_Warp1.text
- This command will quantify, using SGC, the performance of 1 image
registration (warping) based on 3 subjects each scanned twice, under two different
activation paradigms. The data are 3D of matrix size 128x128y64z.
The results of the SGC analysis will be saved in the
output file "results_SGC_CWT_Warp1.text", in the current directory.
Also look at the batch file "batch_SGC_CWT".
Note that the above example represents a single command-line.
© 1997 Ivo D. Dinov,
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