def merge_components(Y,
A,
b,
C,
f,
S,
sn_pix,
temporal_params,
spatial_params,
thr=0.85,
fast_merge=True,
mx=1000,
bl=None,
c1=None,
sn=None,
g=None):
""" Merging of spatially overlapping components that have highly correlated temporal activity
The correlation threshold for merging overlapping components is user specified in thr
Parameters
-----------
Y: np.ndarray
residual movie after subtracting all found components (Y_res = Y - A*C - b*f) (d x T)
A: sparse matrix
matrix of spatial components (d x K)
b: np.ndarray
spatial background (vector of length d)
C: np.ndarray
matrix of temporal components (K x T)
f: np.ndarray
temporal background (vector of length T)
S: np.ndarray
matrix of deconvolved activity (spikes) (K x T)
sn_pix: ndarray
noise standard deviation for each pixel
temporal_params: dictionary
all the parameters that can be passed to the update_temporal_components function
spatial_params: dictionary
all the parameters that can be passed to the update_spatial_components function
thr: scalar between 0 and 1
correlation threshold for merging (default 0.85)
mx: int
maximum number of merging operations (default 50)
sn_pix: nd.array
noise level for each pixel (vector of length d)
bl:
baseline for fluorescence trace for each row in C
c1:
initial concentration for each row in C
g:
discrete time constant for each row in C
sn:
noise level for each row in C
Returns
--------
A: sparse matrix
matrix of merged spatial components (d x K)
C: np.ndarray
matrix of merged temporal components (K x T)
nr: int
number of components after merging
merged_ROIs: list
index of components that have been merged
S: np.ndarray
matrix of merged deconvolved activity (spikes) (K x T)
bl: float
baseline for fluorescence trace
c1: float
initial concentration
g: float
discrete time constant
sn: float
noise level
"""
#%
nr = A.shape[1]
if bl is not None and len(bl) != nr:
raise Exception(
"The number of elements of bl must match the number of components")
if c1 is not None and len(c1) != nr:
raise Exception(
"The number of elements of c1 must match the number of components")
if sn is not None and len(sn) != nr:
raise Exception(
"The number of elements of bl must match the number of components")
if g is not None and len(g) != nr:
raise Exception(
"The number of elements of g must match the number of components")
[d, T] = np.shape(Y)
# C_corr = np.corrcoef(C[:nr,:],C[:nr,:])[:nr,:nr];
C_corr = np.corrcoef(C)
FF1 = C_corr >= thr
#find graph of strongly correlated temporal components
A_corr = A.T * A
A_corr.setdiag(0)
FF2 = A_corr > 0 # % find graph of overlapping spatial components
FF3 = np.logical_and(FF1, FF2.todense())
FF3 = coo_matrix(FF3)
c, l = csgraph.connected_components(FF3) # % extract connected components
p = temporal_params['p']
MC = []
for i in range(c):
if np.sum(l == i) > 1:
MC.append((l == i).T)
MC = np.asarray(MC).T
if MC.ndim > 1:
cor = np.zeros((np.shape(MC)[1], 1))
for i in range(np.size(cor)):
fm = np.where(MC[:, i])[0]
for j1 in range(np.size(fm)):
for j2 in range(j1 + 1, np.size(fm)):
cor[i] = cor[i] + C_corr[fm[j1], fm[j2]]
if not fast_merge:
Y_res = Y - A.dot(C)
if np.size(cor) > 1:
ind = np.argsort(np.squeeze(cor))[::-1]
else:
ind = [0]
nm = min((np.size(ind), mx)) # number of merging operations
A_merged = lil_matrix((d, nm))
C_merged = np.zeros((nm, T))
S_merged = np.zeros((nm, T))
bl_merged = np.zeros((nm, 1))
c1_merged = np.zeros((nm, 1))
sn_merged = np.zeros((nm, 1))
g_merged = np.zeros((nm, p))
# P_merged=[];
merged_ROIs = []
for i in range(nm):
# P_cycle=dict()
merged_ROI = np.where(MC[:, ind[i]])[0]
merged_ROIs.append(merged_ROI)
nC = np.sqrt(np.sum(C[merged_ROI, :]**2, axis=1))
# A_merged[:,i] = np.squeeze((A[:,merged_ROI]*spdiags(nC,0,len(nC),len(nC))).sum(axis=1))
if fast_merge:
Acsc = A.tocsc()[:, merged_ROI]
Acsd = Acsc.toarray()
Ctmp = C[merged_ROI, :]
print merged_ROI.T
#aa = A.tocsc()[:,merged_ROI].dot(scipy.sparse.diags(nC,0,(len(nC),len(nC)))).sum(axis=1)
aa = Acsc.dot(scipy.sparse.diags(
nC, 0, (len(nC), len(nC)))).sum(axis=1)
for iter in range(10):
#cc = np.dot(aa.T.dot(A.toarray()[:,merged_ROI]),C[merged_ROI,:])/(aa.T*aa)
cc = np.dot(aa.T.dot(Acsd), Ctmp) / (aa.T * aa)
#aa = A.tocsc()[:,merged_ROI].dot(C[merged_ROI,:].dot(cc.T))/(cc*cc.T)
aa = Acsc.dot(Ctmp.dot(cc.T)) / (cc * cc.T)
# nC = np.sqrt(np.sum(A.toarray()[:,merged_ROI]**2,axis=0))*np.sqrt(np.sum(C[merged_ROI,:]**2,axis=1))
nC = np.sqrt(np.sum(Acsd**2, axis=0)) * np.sqrt(
np.sum(Ctmp**2, axis=1))
nA = np.sqrt(np.sum(np.array(aa)**2))
aa /= nA
cc *= nA
indx = np.argmax(nC)
if g is not None:
cc, bm, cm, gm, sm, ss = constrained_foopsi(
np.array(cc).squeeze(),
g=g[merged_ROI[indx]],
**temporal_params)
else:
cc, bm, cm, gm, sm, ss = constrained_foopsi(
np.array(cc).squeeze(), g=None, **temporal_params)
A_merged[:, i] = aa
C_merged[i, :] = cc
S_merged[i, :] = ss[:T]
bl_merged[i] = bm
c1_merged[i] = cm
sn_merged[i] = sm
g_merged[i, :] = gm
else:
A_merged[:, i] = lil_matrix((A.tocsc()[:, merged_ROI].dot(
scipy.sparse.diags(nC, 0,
(len(nC), len(nC))))).sum(axis=1))
Y_res = Y_res + A.tocsc()[:, merged_ROI].dot(C[merged_ROI, :])
aa_1 = scipy.sparse.linalg.spsolve(
scipy.sparse.diags(nC, 0, (len(nC), len(nC))),
csc_matrix(C[merged_ROI, :]))
aa_2 = (aa_1).mean(axis=0)
ff = np.nonzero(A_merged[:, i])[0]
# cc,_,_,Ptemp,_ = update_temporal_components(np.asarray(Y_res[ff,:]),A_merged[ff,i],b[ff],aa_2,f,p=p,deconv_method=deconv_method)
cc, _, _, _, bl__, c1__, sn__, g__, YrA = update_temporal_components(
np.asarray(Y_res[ff, :]),
A_merged[ff, i],
b[ff],
aa_2,
f,
bl=None,
c1=None,
sn=None,
g=None,
**temporal_params)
aa, bb, cc = update_spatial_components(np.asarray(Y_res),
cc,
f,
A_merged[:, i],
sn=sn_pix,
**spatial_params)
A_merged[:, i] = aa.tocsr()
cc, _, _, ss, bl__, c1__, sn__, g__, YrA = update_temporal_components(
Y_res[ff, :],
A_merged[ff, i],
bb[ff],
cc,
f,
bl=bl__,
c1=c1__,
sn=sn__,
g=g__,
**temporal_params)
C_merged[i, :] = cc
S_merged[i, :] = ss
bl_merged[i] = bl__[0]
c1_merged[i] = c1__[0]
sn_merged[i] = sn__[0]
g_merged[i, :] = g__[0]
if i + 1 < nm:
Y_res[ff, :] = Y_res[ff, :] - A_merged[ff, i] * cc
#%
neur_id = np.unique(np.hstack(merged_ROIs))
good_neurons = np.setdiff1d(range(nr), neur_id)
A = scipy.sparse.hstack((A.tocsc()[:, good_neurons], A_merged.tocsc()))
C = np.vstack((C[good_neurons, :], C_merged))
if S is not None:
S = np.vstack((S[good_neurons, :], S_merged))
if bl is not None:
bl = np.hstack((bl[good_neurons], np.array(bl_merged).flatten()))
if c1 is not None:
c1 = np.hstack((c1[good_neurons], np.array(c1_merged).flatten()))
if sn is not None:
sn = np.hstack((sn[good_neurons], np.array(sn_merged).flatten()))
if g is not None:
g = np.vstack((np.vstack(g)[good_neurons], g_merged))
# P_new=list(P_[good_neurons].copy())
# P_new=[P_[pp] for pp in good_neurons]
#
# for p in P_merged:
# P_new.append(p)
#
nr = nr - len(neur_id) + nm
else:
print('********** No neurons merged! ***************')
merged_ROIs = []
return A, C, nr, merged_ROIs, S, bl, c1, sn, g
def mergeROIS(Y_res,A,b,C,f,d1,d2,P_,thr=0.8,mx=50,sn=None,deconv_method='spgl1',min_size=3,max_size=8,dist=3,method_exp = 'ellipse', expandCore = iterate_structure(generate_binary_structure(2,1), 2).astype(int)):
"""
merging of spatially overlapping components that have highly correlated tmeporal activity
% The correlation threshold for merging overlapping components is user specified in P.merge_thr (default value 0.85)
% Inputs:
% Y_res: residual movie after subtracting all found components
% A: matrix of spatial components
% b: spatial background
% C: matrix of temporal components
% f: temporal background
% P: parameter struct
% Outputs:
% A: matrix of new spatial components
% C: matrix of new temporal components
% nr: new number of components
% merged_ROIs: list of old components that were merged
% Written by:
% Andrea Giovannucci from implementation of Eftychios A. Pnevmatikakis, Simons Foundation, 2015
"""
#%
nr = A.shape[1]
[d,T] = np.shape(Y_res)
C_corr = np.corrcoef(C[:nr,:],C[:nr,:])[:nr,:nr];
FF1=C_corr>=thr; #find graph of strongly correlated temporal components
A_corr=A.T*A
A_corr.setdiag(0)
FF2=A_corr>0 # % find graph of overlapping spatial components
FF3=np.logical_and(FF1,FF2.todense())
FF3=coo_matrix(FF3)
c,l=csgraph.connected_components(FF3) # % extract connected components
p=len(P_[0]['gn'])
MC=[];
for i in range(c):
if np.sum(l==i)>1:
MC.append((l==i).T)
MC=np.asarray(MC).T
if MC.ndim>1:
cor = np.zeros((np.shape(MC)[1],1));
for i in range(np.size(cor)):
fm = np.where(MC[:,i])[0]
for j1 in range(np.size(fm)):
for j2 in range(j1+1,np.size(fm)):
print j1,j2
cor[i] = cor[i] +C_corr[fm[j1],fm[j2]]
Y_res = Y_res + np.dot(b,f);
if np.size(cor) > 1:
ind=np.argsort(np.squeeze(cor))[::-1]
else:
ind = [0]
nm = min((np.size(ind),mx)) # number of merging operations
A_merged = lil_matrix((d,nm));
C_merged = np.zeros((nm,T));
P_merged=[];
merged_ROIs = []
#%
for i in range(nm):
P_cycle=dict()
merged_ROI=np.where(MC[:,ind[i]])[0]
merged_ROIs.append(merged_ROI)
nC = np.sqrt(np.sum(C[merged_ROI,:]**2,axis=1))
# A_merged[:,i] = np.squeeze((A[:,merged_ROI]*spdiags(nC,0,len(nC),len(nC))).sum(axis=1))
A_merged[:,i] = lil_matrix((A[:,merged_ROI]*scipy.sparse.diags(nC,0,(len(nC),len(nC)))).sum(axis=1))
Y_res = Y_res + A[:,merged_ROI]*C[merged_ROI,:]
aa_1=scipy.sparse.linalg.spsolve(scipy.sparse.diags(nC,0,(len(nC),len(nC))),csc_matrix(C[merged_ROI,:]))
aa_2=(aa_1).mean(axis=0)
ff = np.nonzero(A_merged[:,i])[0]
cc,_,_,Ptemp,S = update_temporal_components(np.asarray(Y_res[ff,:]),A_merged[ff,i],b[ff],aa_2,f,p=p,deconv_method=deconv_method)
aa,bb,cc = update_spatial_components(np.asarray(Y_res),cc,f,A_merged[:,i],d1=d1,d2=d2,sn=sn,min_size=min_size,max_size=max_size,dist=dist,method = method_exp, expandCore =expandCore)
A_merged[:,i] = aa.tocsr();
cc,_,_,Ptemp,S = update_temporal_components(Y_res[ff,:],A_merged[ff,i],bb[ff],cc,f,p=p,deconv_method=deconv_method)
P_cycle=P_[merged_ROI[0]].copy()
P_cycle['gn']=Ptemp[0]['gn']
P_cycle['b']=Ptemp[0]['b']
P_cycle['c1']=Ptemp[0]['c1']
P_cycle['neuron_sn']=Ptemp[0]['neuron_sn']
P_merged.append(P_cycle)
C_merged[i,:] = cc
if i+1 < nm:
Y_res[ff,:] = Y_res[ff,:] - A_merged[ff,i]*cc
#%
neur_id = np.unique(np.hstack(merged_ROIs))
good_neurons=np.setdiff1d(range(nr),neur_id)
A= scipy.sparse.hstack((A[:,good_neurons],A_merged.tocsc()))
C = np.vstack((C[good_neurons,:],C_merged))
# P_new=list(P_[good_neurons].copy())
P_new=[P_[pp] for pp in good_neurons]
for p in P_merged:
P_new.append(p)
nr = nr - len(neur_id) + nm
else:
warnings.warn('No neurons merged!')
merged_ROIs=[];
P_new=P_
return A,C,nr,merged_ROIs,P_new,S
def merge_components(Y,A,b,C,f,S,sn_pix,temporal_params,spatial_params,thr=0.85,fast_merge=True,mx=50,bl=None,c1=None,sn=None,g=None):
""" Merging of spatially overlapping components that have highly correlated temporal activity
The correlation threshold for merging overlapping components is user specified in thr
Parameters
-----------
Y: np.ndarray
residual movie after subtracting all found components (Y_res = Y - A*C - b*f) (d x T)
A: sparse matrix
matrix of spatial components (d x K)
b: np.ndarray
spatial background (vector of length d)
C: np.ndarray
matrix of temporal components (K x T)
f: np.ndarray
temporal background (vector of length T)
S: np.ndarray
matrix of deconvolved activity (spikes) (K x T)
sn_pix: ndarray
noise standard deviation for each pixel
temporal_params: dictionary
all the parameters that can be passed to the update_temporal_components function
spatial_params: dictionary
all the parameters that can be passed to the update_spatial_components function
thr: scalar between 0 and 1
correlation threshold for merging (default 0.85)
mx: int
maximum number of merging operations (default 50)
sn_pix: nd.array
noise level for each pixel (vector of length d)
bl:
baseline for fluorescence trace for each row in C
c1:
initial concentration for each row in C
g:
discrete time constant for each row in C
sn:
noise level for each row in C
Returns
--------
A: sparse matrix
matrix of merged spatial components (d x K)
C: np.ndarray
matrix of merged temporal components (K x T)
nr: int
number of components after merging
merged_ROIs: list
index of components that have been merged
S: np.ndarray
matrix of merged deconvolved activity (spikes) (K x T)
bl: float
baseline for fluorescence trace
c1: float
initial concentration
g: float
discrete time constant
sn: float
noise level
"""
#%
nr = A.shape[1]
if bl is not None and len(bl) != nr:
raise Exception("The number of elements of bl must match the number of components")
if c1 is not None and len(c1) != nr:
raise Exception("The number of elements of c1 must match the number of components")
if sn is not None and len(sn) != nr:
raise Exception("The number of elements of bl must match the number of components")
if g is not None and len(g) != nr:
raise Exception("The number of elements of g must match the number of components")
[d,T] = np.shape(Y)
C_corr = np.corrcoef(C[:nr,:],C[:nr,:])[:nr,:nr];
FF1=C_corr>=thr; #find graph of strongly correlated temporal components
A_corr=A.T*A
A_corr.setdiag(0)
FF2=A_corr>0 # % find graph of overlapping spatial components
FF3=np.logical_and(FF1,FF2.todense())
FF3=coo_matrix(FF3)
c,l=csgraph.connected_components(FF3) # % extract connected components
p=temporal_params['p']
MC=[];
for i in range(c):
if np.sum(l==i)>1:
MC.append((l==i).T)
MC=np.asarray(MC).T
if MC.ndim>1:
cor = np.zeros((np.shape(MC)[1],1));
for i in range(np.size(cor)):
fm = np.where(MC[:,i])[0]
for j1 in range(np.size(fm)):
for j2 in range(j1+1,np.size(fm)):
cor[i] = cor[i] +C_corr[fm[j1],fm[j2]]
if not fast_merge:
Y_res = Y - A.dot(C)
if np.size(cor) > 1:
ind=np.argsort(np.squeeze(cor))[::-1]
else:
ind = [0]
nm = min((np.size(ind),mx)) # number of merging operations
A_merged = lil_matrix((d,nm));
C_merged = np.zeros((nm,T));
S_merged = np.zeros((nm,T));
bl_merged=np.zeros((nm,1))
c1_merged=np.zeros((nm,1))
sn_merged=np.zeros((nm,1))
g_merged=np.zeros((nm,p))
# P_merged=[];
merged_ROIs = []
#%
for i in range(nm):
# P_cycle=dict()
merged_ROI=np.where(MC[:,ind[i]])[0]
merged_ROIs.append(merged_ROI)
nC = np.sqrt(np.sum(C[merged_ROI,:]**2,axis=1))
# A_merged[:,i] = np.squeeze((A[:,merged_ROI]*spdiags(nC,0,len(nC),len(nC))).sum(axis=1))
if fast_merge:
aa = A.tocsc()[:,merged_ROI].dot(scipy.sparse.diags(nC,0,(len(nC),len(nC)))).sum(axis=1)
for iter in range(10):
cc = np.dot(aa.T.dot(A.toarray()[:,merged_ROI]),C[merged_ROI,:])/(aa.T*aa)
aa = A.tocsc()[:,merged_ROI].dot(C[merged_ROI,:].dot(cc.T))/(cc*cc.T)
nC = np.sqrt(np.sum(A.toarray()[:,merged_ROI]**2,axis=0))*np.sqrt(np.sum(C[merged_ROI,:]**2,axis=1))
indx = np.argmax(nC)
cc,bm,cm,gm,sm,ss = constrained_foopsi(np.array(cc).squeeze(),g=g[merged_ROI[indx]],**temporal_params)
A_merged[:,i] = aa;
C_merged[i,:] = cc
S_merged[i,:] = ss[:T]
bl_merged[i] = bm
c1_merged[i] = cm
sn_merged[i] = sm
g_merged[i,:] = gm
else:
A_merged[:,i] = lil_matrix(( A.tocsc()[:,merged_ROI].dot(scipy.sparse.diags(nC,0,(len(nC),len(nC))))).sum(axis=1))
Y_res = Y_res + A.tocsc()[:,merged_ROI].dot(C[merged_ROI,:])
aa_1=scipy.sparse.linalg.spsolve(scipy.sparse.diags(nC,0,(len(nC),len(nC))),csc_matrix(C[merged_ROI,:]))
aa_2=(aa_1).mean(axis=0)
ff = np.nonzero(A_merged[:,i])[0]
# cc,_,_,Ptemp,_ = update_temporal_components(np.asarray(Y_res[ff,:]),A_merged[ff,i],b[ff],aa_2,f,p=p,deconv_method=deconv_method)
cc,_,_,_,bl__,c1__,sn__,g__,YrA = update_temporal_components(np.asarray(Y_res[ff,:]),A_merged[ff,i],b[ff],aa_2,f,bl=None,c1=None,sn=None,g=None,**temporal_params)
aa,bb,cc = update_spatial_components(np.asarray(Y_res),cc,f,A_merged[:,i],sn=sn_pix,**spatial_params)
A_merged[:,i] = aa.tocsr();
cc,_,_,ss,bl__,c1__,sn__,g__,YrA = update_temporal_components(Y_res[ff,:],A_merged[ff,i],bb[ff],cc,f,bl=bl__,c1=c1__,sn=sn__,g=g__,**temporal_params)
# P_cycle=P_[merged_ROI[0]].copy()
# P_cycle['gn']=Ptemp[0]['gn']
# P_cycle['b']=Ptemp[0]['b']
# P_cycle['c1']=Ptemp[0]['c1']
# P_cycle['neuron_sn']=Ptemp[0]['neuron_sn']
# P_merged.append(P_cycle)
C_merged[i,:] = cc
S_merged[i,:] = ss
bl_merged[i] = bl__[0]
c1_merged[i] = c1__[0]
sn_merged[i] = sn__[0]
g_merged[i,:] = g__[0]
if i+1 < nm:
Y_res[ff,:] = Y_res[ff,:] - A_merged[ff,i]*cc
#%
neur_id = np.unique(np.hstack(merged_ROIs))
good_neurons=np.setdiff1d(range(nr),neur_id)
A = scipy.sparse.hstack((A.tocsc()[:,good_neurons],A_merged.tocsc()))
C = np.vstack((C[good_neurons,:],C_merged))
S = np.vstack((S[good_neurons,:],S_merged))
bl=np.hstack((bl[good_neurons],np.array(bl_merged).flatten()))
c1=np.hstack((c1[good_neurons],np.array(c1_merged).flatten()))
sn=np.hstack((sn[good_neurons],np.array(sn_merged).flatten()))
g=np.vstack((np.vstack(g)[good_neurons],g_merged))
# P_new=list(P_[good_neurons].copy())
# P_new=[P_[pp] for pp in good_neurons]
#
# for p in P_merged:
# P_new.append(p)
#
nr = nr - len(neur_id) + nm
else:
print('********** No neurons merged! ***************')
merged_ROIs=[];
return A,C,nr,merged_ROIs,S,bl,c1,sn,g
def fit(self, images):
"""
This method uses the cnmf algorithm to find sources in data.
Parameters
----------
images : mapped np.ndarray of shape (t,x,y) containing the images that vary over time.
Returns
--------
self
"""
T, d1, d2 = images.shape
dims = (d1, d2)
Yr = images.reshape([T, np.prod(dims)], order='F').T
Y = np.transpose(images, [1, 2, 0])
print T, d1, d2
options = CNMFSetParms(Y,self.n_processes,p=self.p,gSig=self.gSig,K=self.k,ssub=self.ssub,tsub=self.tsub,\
p_ssub=self.p_ssub, p_tsub=self.p_tsub, method_init= self.method_init)
self.options = options
if self.rf is None:
Yr, sn, g, psx = preprocess_data(Yr,
dview=self.dview,
**options['preprocess_params'])
if self.Ain is None:
if self.alpha_snmf is not None:
options['init_params']['alpha_snmf'] = self.alpha_snmf
self.Ain, self.Cin, self.b_in, self.f_in, center = initialize_components(
Y, normalize=True, **options['init_params'])
if self.Ain.dtype == bool:
A, b, Cin, fin = update_spatial_components(
Yr,
self.Cin,
self.f_in,
self.Ain,
sn=sn,
dview=self.dview,
**options['spatial_params'])
self.f_in = fin
else:
A, b, Cin = update_spatial_components(
Yr,
self.Cin,
self.f_in,
self.Ain,
sn=sn,
dview=self.dview,
**options['spatial_params'])
options['temporal_params'][
'p'] = 0 # set this to zero for fast updating without deconvolution
C, f, S, bl, c1, neurons_sn, g, YrA = update_temporal_components(
Yr,
A,
b,
Cin,
self.f_in,
dview=self.dview,
**options['temporal_params'])
if self.do_merge:
A, C, nr, merged_ROIs, S, bl, c1, sn1, g1 = merge_components(
Yr,
A,
b,
C,
f,
S,
sn,
options['temporal_params'],
options['spatial_params'],
dview=self.dview,
bl=bl,
c1=c1,
sn=neurons_sn,
g=g,
thr=self.merge_thresh,
mx=50,
fast_merge=True)
print A.shape
A, b, C = update_spatial_components(Yr,
C,
f,
A,
sn=sn,
dview=self.dview,
**options['spatial_params'])
options['temporal_params'][
'p'] = self.p # set it back to original value to perform full deconvolution
C, f, S, bl, c1, neurons_sn, g1, YrA = update_temporal_components(
Yr,
A,
b,
C,
f,
dview=self.dview,
bl=None,
c1=None,
sn=None,
g=None,
**options['temporal_params'])
else: # use patches
if self.stride is None:
self.stride = np.int(self.rf * 2 * .1)
print('**** Setting the stride to 10% of 2*rf automatically:' +
str(self.stride))
if type(images) is np.ndarray:
raise Exception(
'You need to provide a memory mapped file as input if you use patches!!'
)
if self.only_init:
options['patch_params']['only_init'] = True
A, C, YrA, b, f, sn, optional_outputs = run_CNMF_patches(
images.filename, (d1, d2, T),
options,
rf=self.rf,
stride=self.stride,
dview=self.dview,
memory_fact=self.memory_fact,
gnb=self.gnb)
options = CNMFSetParms(Y,
self.n_processes,
p=self.p,
gSig=self.gSig,
K=A.shape[-1],
thr=self.merge_thresh)
pix_proc = np.minimum(
np.int((d1 * d2) / self.n_processes / (T / 2000.)),
np.int(
(d1 * d2) /
self.n_processes)) # regulates the amount of memory used
options['spatial_params']['n_pixels_per_process'] = pix_proc
options['temporal_params']['n_pixels_per_process'] = pix_proc
#
merged_ROIs = [0]
while len(merged_ROIs) > 0:
A, C, nr, merged_ROIs, S, bl, c1, sn, g = merge_components(
Yr,
A, [],
np.array(C), [],
np.array(C), [],
options['temporal_params'],
options['spatial_params'],
dview=self.dview,
thr=self.merge_thresh,
mx=np.Inf)
C, f, S, bl, c1, neurons_sn, g2, YrA = update_temporal_components(
Yr,
A,
b,
C,
f,
dview=self.dview,
bl=None,
c1=None,
sn=None,
g=None,
**options['temporal_params'])
# idx_components, fitness, erfc ,r_values, num_significant_samples = evaluate_components(Y,C+YrA,A,N=self.N_samples_fitness,robust_std=self.robust_std,thresh_finess=self.fitness_threshold)
# sure_in_idx= idx_components[np.logical_and(np.array(num_significant_samples)>0 ,np.array(r_values)>=self.corr_threshold)]
#
# print ('Keeping ' + str(len(sure_in_idx)) + ' components out of ' + str(len(idx_components)))
#
#
# A=A[:,sure_in_idx]
# C=C[sure_in_idx,:]
# YrA=YrA[sure_in_idx]
self.S = S
self.A = A
self.C = C
self.b = b
self.f = f
self.YrA = YrA
self.sn = sn
return self
def mergeROIS(Y_res,
A,
b,
C,
f,
S,
d1,
d2,
P_,
thr=0.85,
mx=50,
sn=None,
deconv_method='spgl1',
min_size=3,
max_size=8,
dist=3,
method_exp='ellipse',
expandCore=iterate_structure(generate_binary_structure(2, 1),
2).astype(int)):
"""
merging of spatially overlapping components that have highly correlated temporal activity
The correlation threshold for merging overlapping components is user specified in thr
Inputs:
Y_res: np.ndarray
residual movie after subtracting all found components (Y_res = Y - A*C - b*f) (d x T)
A: sparse matrix
matrix of spatial components (d x K)
b: np.ndarray
spatial background (vector of length d)
C: np.ndarray
matrix of temporal components (K x T)
f: np.ndarray
temporal background (vector of length T)
P_: struct
structure with neuron parameteres
S: np.ndarray
matrix of deconvolved activity (spikes) (K x T)
thr: scalar between 0 and 1
correlation threshold for merging (default 0.85)
mx: int
maximum number of merging operations (default 50)
sn: nd.array
noise level for each pixel (vector of length d)
Outputs:
A: sparse matrix
matrix of merged spatial components (d x K)
C: np.ndarray
matrix of merged temporal components (K x T)
nr: int
number of components after merging
P_: struct
structure with new neuron parameteres
S: np.ndarray
matrix of merged deconvolved activity (spikes) (K x T)
% Written by:
% Andrea Giovannucci from implementation of Eftychios A. Pnevmatikakis, Simons Foundation, 2015
"""
#%
nr = A.shape[1]
[d, T] = np.shape(Y_res)
C_corr = np.corrcoef(C[:nr, :], C[:nr, :])[:nr, :nr]
FF1 = C_corr >= thr
#find graph of strongly correlated temporal components
A_corr = A.T * A
A_corr.setdiag(0)
FF2 = A_corr > 0 # % find graph of overlapping spatial components
FF3 = np.logical_and(FF1, FF2.todense())
FF3 = coo_matrix(FF3)
c, l = csgraph.connected_components(FF3) # % extract connected components
p = len(P_[0]['gn'])
MC = []
for i in range(c):
if np.sum(l == i) > 1:
MC.append((l == i).T)
MC = np.asarray(MC).T
if MC.ndim > 1:
cor = np.zeros((np.shape(MC)[1], 1))
for i in range(np.size(cor)):
fm = np.where(MC[:, i])[0]
for j1 in range(np.size(fm)):
for j2 in range(j1 + 1, np.size(fm)):
print j1, j2
cor[i] = cor[i] + C_corr[fm[j1], fm[j2]]
Y_res = Y_res + np.dot(b, f)
if np.size(cor) > 1:
ind = np.argsort(np.squeeze(cor))[::-1]
else:
ind = [0]
nm = min((np.size(ind), mx)) # number of merging operations
A_merged = lil_matrix((d, nm))
C_merged = np.zeros((nm, T))
S_merged = np.zeros((nm, T))
P_merged = []
merged_ROIs = []
#%
for i in range(nm):
P_cycle = dict()
merged_ROI = np.where(MC[:, ind[i]])[0]
merged_ROIs.append(merged_ROI)
nC = np.sqrt(np.sum(C[merged_ROI, :]**2, axis=1))
# A_merged[:,i] = np.squeeze((A[:,merged_ROI]*spdiags(nC,0,len(nC),len(nC))).sum(axis=1))
A_merged[:, i] = lil_matrix(
(A[:, merged_ROI] *
scipy.sparse.diags(nC, 0, (len(nC), len(nC)))).sum(axis=1))
Y_res = Y_res + A[:, merged_ROI] * C[merged_ROI, :]
aa_1 = scipy.sparse.linalg.spsolve(
scipy.sparse.diags(nC, 0, (len(nC), len(nC))),
csc_matrix(C[merged_ROI, :]))
aa_2 = (aa_1).mean(axis=0)
ff = np.nonzero(A_merged[:, i])[0]
cc, _, _, Ptemp, _ = update_temporal_components(
np.asarray(Y_res[ff, :]),
A_merged[ff, i],
b[ff],
aa_2,
f,
p=p,
method=deconv_method)
aa, bb, cc = update_spatial_components(np.asarray(Y_res),
cc,
f,
A_merged[:, i],
d1=d1,
d2=d2,
sn=sn,
min_size=min_size,
max_size=max_size,
dist=dist,
method=method_exp,
expandCore=expandCore)
A_merged[:, i] = aa.tocsr()
cc, _, _, Ptemp, ss = update_temporal_components(
Y_res[ff, :],
A_merged[ff, i],
bb[ff],
cc,
f,
p=p,
method=deconv_method)
P_cycle = P_[merged_ROI[0]].copy()
P_cycle['gn'] = Ptemp[0]['gn']
P_cycle['b'] = Ptemp[0]['b']
P_cycle['c1'] = Ptemp[0]['c1']
P_cycle['neuron_sn'] = Ptemp[0]['neuron_sn']
P_merged.append(P_cycle)
C_merged[i, :] = cc
S_merged[i, :] = ss
if i + 1 < nm:
Y_res[ff, :] = Y_res[ff, :] - A_merged[ff, i] * cc
#%
neur_id = np.unique(np.hstack(merged_ROIs))
good_neurons = np.setdiff1d(range(nr), neur_id)
A = scipy.sparse.hstack((A[:, good_neurons], A_merged.tocsc()))
C = np.vstack((C[good_neurons, :], C_merged))
S = np.vstack((S[good_neurons, :], S_merged))
# P_new=list(P_[good_neurons].copy())
P_new = [P_[pp] for pp in good_neurons]
for p in P_merged:
P_new.append(p)
nr = nr - len(neur_id) + nm
else:
warnings.warn('No neurons merged!')
merged_ROIs = []
P_new = P_
return A, C, nr, merged_ROIs, P_new, S
def fit(self, images):
"""
This method uses the cnmf algorithm to find sources in data.
Parameters
----------
images : np.ndarray
Array of shape (t,x,y) containing the images that vary over time.
Returns
--------
neurons : np.ndarray
Array of shape (x,y,n) where n is the neuron number
temporaldata : np.ndarray
Array of shape (n,t) where n is the neuron number and t is the frame number
"""
dims=(images.shape[1],images.shape[2])
T=images.shape[0]
Yr = np.transpose(images, range(1, len(dims) + 1) + [0])
Yr = np.reshape(Yr, (np.prod(dims), T), order='F')
Y=np.reshape(Yr,dims+(T,),order='F')
options = CNMFSetParms(Y,p=self.p,gSig=self.gSig,K=self.k, backend=self.backend, thr=self.merge_thresh, n_processes=self.n_processes)
Cn = local_correlations(Y)
Yr,sn = preprocess_data(Yr,**options['preprocess_params'])
Atmp, Ctmp, b_in, f_in, center=initialize_components(Y, **options['init_params'])
Ain,Cin = Atmp, Ctmp
A,b,Cin = update_spatial_components(Yr, Cin, f_in, Ain, sn=sn, **options['spatial_params'])
options['temporal_params']['p'] = 0 # set this to zero for fast updating without deconvolution
C,f,S,bl,c1,neurons_sn,g,YrA = update_temporal_components(Yr,A,b,Cin,f_in,bl=None,c1=None,sn=None,g=None,**options['temporal_params'])
A_m,C_m,nr_m,merged_ROIs,S_m,bl_m,c1_m,sn_m,g_m=merge_components(Yr,A,b,C,f,S,sn,options['temporal_params'],options['spatial_params'], options['merging'],bl=bl, c1=c1, sn=neurons_sn, g=g, mx=50, fast_merge = True)
A2,b2,C2 = update_spatial_components(Yr, C_m, f, A_m, sn=sn, **options['spatial_params'])
options['temporal_params']['p'] = self.p # set it back to original value to perform full deconvolution
C2,f2,S2,bl2,c12,neurons_sn2,g21,YrA = update_temporal_components(Yr,A2,b2,C2,f,bl=None,c1=None,sn=None,g=None,**options['temporal_params'])
A_or, temporaldata, srt = order_components(A2,C2)
neurons=A_or.reshape(dims[1],dims[0],A_or.shape[1])
return np.transpose(neurons, [1,0,2]), temporaldata
# images = check_images(images)
# chunk_size = chunk_size if chunk_size is not None else images.shape[1:]
# blocks = images.toblocks(chunk_size=chunk_size, padding=padding)
# sources = asarray(blocks.map_generic(self._get))
# # add offsets based on block coordinates
# for inds in itertools.product(*[range(d) for d in sources.shape]):
# offset = (asarray(inds) * asarray(blocks.blockshape)[1:])
# for source in sources[inds]:
# source.coordinates += offset
# if padding:
# leftpad = [blocks.padding[i + 1] if inds[i] != 0 else 0 for i in range(len(inds))]
# source.coordinates -= asarray(leftpad)
# # flatten list and create model
# flattened = list(itertools.chain.from_iterable(sources.flatten().tolist()))
# return ExtractionModel(many(flattened))
# def _get(self, block):
# """
# Perform NMF on a block to identify spatial regions.
# """
# dims = block.shape[1:]
# max_size = prod(dims) / 2 if self.max_size == 'full' else self.max_size
# # reshape to t x spatial dimensions
# data = block.reshape(block.shape[0], -1)
# # build and apply NMF model to block
# model = SKNMF(self.k, max_iter=self.max_iter)
# model.fit(clip(data, 0, inf))
# # reconstruct sources as spatial objects in one array
# components = model.components_.reshape((self.k,) + dims)
# # convert from basis functions into shape
# # by median filtering (optional), applying a percentile threshold,
# # finding connected components and removing small objects
# combined = []
# for component in components:
# tmp = component > percentile(component, self.percentile)
# labels, num = label(tmp, return_num=True)
# if num == 1:
# counts = bincount(labels.ravel())
# if counts[1] < self.min_size:
# continue
# else:
# regions = labels
# else:
# regions = remove_small_objects(labels, min_size=self.min_size)
# ids = unique(regions)
# ids = ids[ids > 0]
# for ii in ids:
# r = regions == ii
# r = median_filter(r, 2)
# coords = asarray(where(r)).T
# if (size(coords) > 0) and (size(coords) < max_size):
# combined.append(one(coords))
# # merge overlapping sources
# if self.overlap is not None:
# # iterate over source pairs and find a pair to merge
# def merge(sources):
# for i1, s1 in enumerate(sources):
# for i2, s2 in enumerate(sources[i1+1:]):
# if s1.overlap(s2) > self.overlap:
# return i1, i1 + 1 + i2
# return None
# # merge pairs until none left to merge
# pair = merge(combined)
# testing = True
# while testing:
# if pair is None:
# testing = False
# else:
# combined[pair[0]] = combined[pair[0]].merge(combined[pair[1]])
# del combined[pair[1]]
# pair = merge(combined)
# return combined