Example #1
0
def best_smoother():

    for smoo in np.linspace(3,5,10):
        gqs=GeneralizedQSampling(data,bvals,bvecs,smoo,
                        odf_sphere=odf_sphere,
                        mask=None,
                        squared=True,
                        auto=False,
                        save_odfs=True)
        gqs.peak_thr=0.5
        gqs.fit()
        gqs.ODF[gqs.ODF<0]=0.
        
        odf=gqs.ODF[0,0,0]

        print smoo, np.sum((direct_odf/direct_odf.max() - odf/odf.max())**2)
Example #2
0
 #mf,mevals,mevecs=example('1b')    
 #signal=MultiTensor(bvals,bvecs,S0=1.,mf=mf,mevals=mevals,mevecs=mevecs)
 #data=signal    
 #data=data[None,None,None,:]
 data=data[:,4:40,:,:]
 #ten
 ten = Tensor(100*data, bvals, bvecs)
 FA = ten.fa()
 #GQI
 gqs=GeneralizedQSampling(data,bvals,bvecs,smooth[i],
                 odf_sphere=odf_sphere,
                 mask=None,
                 squared=True,
                 auto=False,
                 save_odfs=True)
 gqs.peak_thr=0.5
 gqs.fit()
 gqs.ODF[gqs.ODF<0]=0.
 #manipulate
 qg=gqs
 #pack_results
 M,R=analyze_peaks(data,ten,qg)
 if test=='train':
     K=np.load('trainSF.npy')
     print 'SNR',snr, 'smooth',smooth[i],\
         'Missed',np.sum(np.abs(M-K)>0), \
         'Success',100*(np.float(np.prod(M.shape))-np.sum(np.abs(M-K)>0))/np.float(np.prod(M.shape)),'%'
 if save==True:
     save_for_mat(test,typ,snr,M,R)
 #show ODFs
 if show==True: