def load_or_compute_classifier(self,train,test,mask=None):
from rwsegment import boundary_utils
reload(boundary_utils)
#idir_prior = config.dir_prior_edges + test
#if not os.path.isdir(dir_prior):
# os.makedirs(dir_prior)
## Train classifier
logger.info('train classifier with train {} for test {}'.format(train, test))
##load image and seg
im = io_analyze.load(
config.dir_reg + test + train + 'reggray.hdr').astype(float)
nim = im/np.std(im)
seg = io_analyze.load(config.dir_reg + test + train + 'regseg.hdr')
seg.flat[~np.in1d(seg, self.labelset)] = self.labelset[0]
## sample points
points = boundary_utils.sample_points(im, self.step, mask=mask)
logger.debug('number of sampled points = {}'.format(len(points)))
#impoints = np.zeros(im.shape,dtype=int)
#impoints[tuple(points.T)] = np.arange(len(points)) + 1
## compute edges
edges,edgev,labels = boundary_utils.get_edges(im, points, mask=mask)
logger.debug('number of edges = {}'.format(len(edges)))
## extract profiles
profiles,emap,dists = boundary_utils.get_profiles(nim, points, edges, rad=0)
logger.debug('extracted profiles')
## make features
x = boundary_utils.make_features(profiles, size=self.sizex, additional=[dists,edgev,edgev/dists])
logger.debug('features made, size = {}'.format(len(x[0])))
## make annotations
z = boundary_utils.is_boundary(points, edges, seg)
logger.debug('annotations made')
## learn profiles
logger.debug('training classifier')
classifier = boundary_utils.Classifier()
classifier.train(x,z)
## test classification
logger.debug('testing classifier')
cl, scores = classifier.classify(x)
logger.info('non boundary correct rate: {:.3}'.format(
np.sum((np.r_[cl]==0)&(np.r_[z]==0))/np.sum(np.r_[z]==0).astype(float)))
logger.info('boundary correct rate: {:.3}'.format(
np.sum((np.r_[cl]==1)&(np.r_[z]==1))/np.sum(np.r_[z]==1).astype(float)))
## store classifier
#np.savetxt(dir_prior + 'classifier.txt', classifier.w)
return classifier
def process_sample(self, train, test):
outdir = config.dir_work + 'autoseeds/' + config.basis + '/' + train + '/' + test
logger.info('saving data in: {}'.format(outdir))
if not os.path.isdir(outdir):
os.makedirs(outdir)
## get prior
from scipy import ndimage
segtrain = io_analyze.load(config.dir_reg + test + train +
'/regseg.hdr')
segtrain.flat[~np.in1d(segtrain, self.labelset)] = self.labelset[0]
struct = np.ones((10, ) * segtrain.ndim)
mask = ndimage.binary_dilation(
segtrain > 0,
structure=struct,
).astype(bool)
#prior, mask = load_or_compute_prior_and_mask(
# test,force_recompute=self.force_recompute_prior)
#mask = mask.astype(bool)
## load image
file_name = config.dir_reg + test + 'gray.hdr'
logger.info('segmenting data: {}'.format(file_name))
im = io_analyze.load(file_name).astype(float)
file_gt = config.dir_reg + test + 'seg.hdr'
seg = io_analyze.load(file_gt)
seg.flat[~np.in1d(seg, self.labelset)] = self.labelset[0]
## normalize image
nim = im / np.std(im)
#orient_scores = self.load_or_compute_orientations(train,test, mask=mask)
if 1: #not os.path.isfile(outdir + 'points.npy'):
from rwsegment import boundary_utils
reload(boundary_utils)
## sample points
points = boundary_utils.sample_points(im, self.step, mask=mask)
points = points[mask[tuple(points.T)]]
impoints = np.zeros(im.shape, dtype=int)
impoints[tuple(points.T)] = np.arange(len(points)) + 1
ipoints = np.where(impoints.ravel())[0]
points = np.argwhere(impoints)
np.save(outdir + 'points.npy', points)
impoints[tuple(points.T)] = np.arange(len(points)) + 1
## set unary potentials from prior: array of unary costs
nlabel = len(self.labelset)
dist = self.distance_to_train(segtrain, points)
T = 10.0
prob_pts = np.exp(-(dist / T)**2) / np.c_[np.sum(
np.exp(-(dist / T)**2), axis=1)]
#prob = np.c_[np.ones(im.size), np.zeros((im.size, nlabel-1))]
#prob[mask.ravel(),:] = prior['data'].T
#prob_pts = prob[ipoints,:]
np.save(outdir + 'prob_points.npy', prob_pts)
## binary potentials
## compute edges
edges, edgev, labels = boundary_utils.get_edges(im,
points,
mask=mask)
edges = np.sort(edges, axis=1)
np.save(outdir + 'edges.npy', edges)
## get orientation hist
orient_scores, hist = self.load_or_compute_orientations(train,
test,
mask=mask)
##classify edges
vecs = points[edges[:, 1]] - points[edges[:, 0]]
vecs = vecs / np.c_[np.sqrt(np.sum(vecs**2, axis=1))]
scores = self.get_orient_scores(vecs)
prob_orient = np.dot(scores, orient_scores)
#prob_orient = prob_orient/np.c_[np.sum(prob_orient, axis=1)]
np.save(outdir + 'prob_orient.npy', prob_orient)
'''
## load classifier
classifier = self.load_or_compute_classifier(train,test, mask=mask)
## extract profiles
profiles,emap,dists = boundary_utils.get_profiles(nim, points, edges, rad=0)
## make features
x = boundary_utils.make_features(
profiles,
size=self.sizex,
additional=[dists,edgev,edgev/dists],
)
## classify
cl, scores = classifier.classify(x)
## ground truth
z = boundary_utils.is_boundary(points, edges, seg)
logger.info('non boundary classification: {}%'\
.format(np.sum((np.r_[z]==0)*(np.r_[cl]==0))/float(np.sum(np.r_[z]==0))*100))
logger.info('boundary classification: {}%'\
.format(np.sum((np.r_[z]==1)*(np.r_[cl]==1))/float(np.sum(np.r_[z]==1))*100))
np.save(outdir + 'classified.npy', cl)
## probabilities
prob_edges = 1. - scores/np.c_[np.sum(scores, axis=1)]
##save probs
np.save(outdir + 'prob_edges.npy',prob_edges)
'''
else:
points = np.load(outdir + 'points.npy')
edges = np.load(outdir + 'edges.npy')
cl = np.load(outdir + 'classified.npy')
prob_pts = np.load(outdir + 'prob_points.npy')
#prob_edges = np.load(outdir + 'prob_edges.npy')
prob_orient = np.load(outdir + 'prob_orient.npy')
## make potentials
unary = -np.log(prob_pts + 1e-10)
#binary = - np.log(prob_edges + 1e-10)
#thresh = (prob_orient.shape[1] - 1.0)/prob_orient.shape[1]
thresh = (len(self.orients) - 1.0) / len(self.orients)
orient_cost = -np.log(np.clip(prob_orient + thresh, 0, 1) +
1e-10) * 100
orient_cost = np.clip(orient_cost, 0, 1e10)
#import ipdb; ipdb.set_trace()
## solve MRF:
import ipdb
ipdb.set_trace()
'''
from rwsegment.mrf import fastPD
class CostFunction(object):
def __init__(self,**kwargs):
self.binary = kwargs.pop('binary',0)
self.orient_indices = kwargs.pop('orient_indices')
self.orient_cost = kwargs.pop('orient_cost')
def __call__(self,e,l1,l2):
idpair = self.orient_indices[l1,l2]
pair_cost = self.orient_cost[e,idpair]
cost = (l1!=l2)*pair_cost
#return (l1!=l2)*(1-cl[e])*0.1
#return (l1!=l2)*self.binary[e,1]*0.1
#y = l1!=l2
#return self.binary[e, y]*pair_cost
print e, l1, l2, cost
return cost
#sol, en = fastPD.fastPD_callback(unary, edges, cost_function(binary), debug=True)
cost_function = CostFunction(
#binary=binary,
orient_indices=self.orient_indices,
orient_cost=orient_cost,
)
sol, en = fastPD.fastPD_callback(unary, edges, cost_function, debug=True)
'''
wpairs = orient_cost
from rwsegment.mrf import trw
sol, en = trw.TRW_general(unary,
edges,
wpairs,
niters=1000,
verbose=True)
labels = self.labelset[sol]
imsol = np.ones(im.shape, dtype=np.int32) * 20
imsol[tuple(points.T)] = labels
io_analyze.save(outdir + 'imseeds.hdr', imsol)
## classify sol
gtlabels = seg[tuple(points.T)]
priorlabels = self.labelset[np.argmin(unary, axis=1)]
err_prior = 1 - np.sum(gtlabels == priorlabels) / float(len(points))
err = 1 - np.sum(gtlabels == labels) / float(len(points))
logger.info('error in prior sol: {}%'.format(err_prior * 100))
logger.info('error in sol: {}%'.format(err * 100))
import ipdb
ipdb.set_trace()
## start segmenting
sol, y = rwsegment.segment(nim,
seeds=seeds,
labelset=self.labelset,
weight_function=self.weight_function,
**self.params)
## compute Dice coefficient per label
dice = compute_dice_coef(sol, seg, labelset=self.labelset)
logger.info('Dice: {}'.format(dice))
if not config.debug:
io_analyze.save(outdir + 'sol.hdr', sol.astype(np.int32))
np.savetxt(outdir + 'dice.txt',
np.c_[dice.keys(), dice.values()],
fmt='%d %.8f')
def load_or_compute_classifier(self, train, test, mask=None):
from rwsegment import boundary_utils
reload(boundary_utils)
#idir_prior = config.dir_prior_edges + test
#if not os.path.isdir(dir_prior):
# os.makedirs(dir_prior)
## Train classifier
logger.info('train classifier with train {} for test {}'.format(
train, test))
##load image and seg
im = io_analyze.load(config.dir_reg + test + train +
'reggray.hdr').astype(float)
nim = im / np.std(im)
seg = io_analyze.load(config.dir_reg + test + train + 'regseg.hdr')
seg.flat[~np.in1d(seg, self.labelset)] = self.labelset[0]
## sample points
points = boundary_utils.sample_points(im, self.step, mask=mask)
logger.debug('number of sampled points = {}'.format(len(points)))
#impoints = np.zeros(im.shape,dtype=int)
#impoints[tuple(points.T)] = np.arange(len(points)) + 1
## compute edges
edges, edgev, labels = boundary_utils.get_edges(im, points, mask=mask)
logger.debug('number of edges = {}'.format(len(edges)))
## extract profiles
profiles, emap, dists = boundary_utils.get_profiles(nim,
points,
edges,
rad=0)
logger.debug('extracted profiles')
## make features
x = boundary_utils.make_features(
profiles,
size=self.sizex,
additional=[dists, edgev, edgev / dists])
logger.debug('features made, size = {}'.format(len(x[0])))
## make annotations
z = boundary_utils.is_boundary(points, edges, seg)
logger.debug('annotations made')
## learn profiles
logger.debug('training classifier')
classifier = boundary_utils.Classifier()
classifier.train(x, z)
## test classification
logger.debug('testing classifier')
cl, scores = classifier.classify(x)
logger.info('non boundary correct rate: {:.3}'.format(
np.sum((np.r_[cl] == 0) & (np.r_[z] == 0)) /
np.sum(np.r_[z] == 0).astype(float)))
logger.info('boundary correct rate: {:.3}'.format(
np.sum((np.r_[cl] == 1) & (np.r_[z] == 1)) /
np.sum(np.r_[z] == 1).astype(float)))
## store classifier
#np.savetxt(dir_prior + 'classifier.txt', classifier.w)
return classifier
def process_sample(self,train, test):
outdir = config.dir_work + 'autoseeds/' + config.basis + '/' + train + '/' + test
logger.info('saving data in: {}'.format(outdir))
if not os.path.isdir(outdir):
os.makedirs(outdir)
## get prior
from scipy import ndimage
segtrain = io_analyze.load(config.dir_reg + test + train + '/regseg.hdr')
segtrain.flat[~np.in1d(segtrain, self.labelset)] = self.labelset[0]
struct = np.ones((10,)*segtrain.ndim)
mask = ndimage.binary_dilation(
segtrain>0,
structure=struct,
).astype(bool)
#prior, mask = load_or_compute_prior_and_mask(
# test,force_recompute=self.force_recompute_prior)
#mask = mask.astype(bool)
## load image
file_name = config.dir_reg + test + 'gray.hdr'
logger.info('segmenting data: {}'.format(file_name))
im = io_analyze.load(file_name).astype(float)
file_gt = config.dir_reg + test + 'seg.hdr'
seg = io_analyze.load(file_gt)
seg.flat[~np.in1d(seg, self.labelset)] = self.labelset[0]
## normalize image
nim = im/np.std(im)
#orient_scores = self.load_or_compute_orientations(train,test, mask=mask)
if 1:#not os.path.isfile(outdir + 'points.npy'):
from rwsegment import boundary_utils
reload(boundary_utils)
## sample points
points = boundary_utils.sample_points(im, self.step, mask=mask)
points = points[mask[tuple(points.T)]]
impoints = np.zeros(im.shape,dtype=int)
impoints[tuple(points.T)] = np.arange(len(points)) + 1
ipoints = np.where(impoints.ravel())[0]
points = np.argwhere(impoints)
np.save(outdir + 'points.npy', points)
impoints[tuple(points.T)] = np.arange(len(points)) + 1
## set unary potentials from prior: array of unary costs
nlabel = len(self.labelset)
dist = self.distance_to_train(segtrain, points)
T = 10.0
prob_pts = np.exp(-(dist/T)**2) / np.c_[np.sum(np.exp(-(dist/T)**2),axis=1)]
#prob = np.c_[np.ones(im.size), np.zeros((im.size, nlabel-1))]
#prob[mask.ravel(),:] = prior['data'].T
#prob_pts = prob[ipoints,:]
np.save(outdir + 'prob_points.npy', prob_pts)
## binary potentials
## compute edges
edges,edgev,labels = boundary_utils.get_edges(im, points, mask=mask)
edges = np.sort(edges,axis=1)
np.save(outdir + 'edges.npy', edges)
## get orientation hist
orient_scores,hist = self.load_or_compute_orientations(train,test, mask=mask)
##classify edges
vecs = points[edges[:,1]] - points[edges[:,0]]
vecs = vecs / np.c_[np.sqrt(np.sum(vecs**2,axis=1))]
scores = self.get_orient_scores(vecs)
prob_orient = np.dot(scores, orient_scores)
#prob_orient = prob_orient/np.c_[np.sum(prob_orient, axis=1)]
np.save(outdir + 'prob_orient.npy', prob_orient)
'''
## load classifier
classifier = self.load_or_compute_classifier(train,test, mask=mask)
## extract profiles
profiles,emap,dists = boundary_utils.get_profiles(nim, points, edges, rad=0)
## make features
x = boundary_utils.make_features(
profiles,
size=self.sizex,
additional=[dists,edgev,edgev/dists],
)
## classify
cl, scores = classifier.classify(x)
## ground truth
z = boundary_utils.is_boundary(points, edges, seg)
logger.info('non boundary classification: {}%'\
.format(np.sum((np.r_[z]==0)*(np.r_[cl]==0))/float(np.sum(np.r_[z]==0))*100))
logger.info('boundary classification: {}%'\
.format(np.sum((np.r_[z]==1)*(np.r_[cl]==1))/float(np.sum(np.r_[z]==1))*100))
np.save(outdir + 'classified.npy', cl)
## probabilities
prob_edges = 1. - scores/np.c_[np.sum(scores, axis=1)]
##save probs
np.save(outdir + 'prob_edges.npy',prob_edges)
'''
else:
points = np.load(outdir + 'points.npy')
edges = np.load(outdir + 'edges.npy')
cl = np.load(outdir + 'classified.npy')
prob_pts = np.load(outdir + 'prob_points.npy')
#prob_edges = np.load(outdir + 'prob_edges.npy')
prob_orient = np.load(outdir + 'prob_orient.npy')
## make potentials
unary = - np.log(prob_pts + 1e-10)
#binary = - np.log(prob_edges + 1e-10)
#thresh = (prob_orient.shape[1] - 1.0)/prob_orient.shape[1]
thresh = (len(self.orients) - 1.0) / len(self.orients)
orient_cost = - np.log(np.clip(prob_orient + thresh,0,1) + 1e-10)*100
orient_cost = np.clip(orient_cost, 0, 1e10)
#import ipdb; ipdb.set_trace()
## solve MRF:
import ipdb; ipdb.set_trace()
'''
from rwsegment.mrf import fastPD
class CostFunction(object):
def __init__(self,**kwargs):
self.binary = kwargs.pop('binary',0)
self.orient_indices = kwargs.pop('orient_indices')
self.orient_cost = kwargs.pop('orient_cost')
def __call__(self,e,l1,l2):
idpair = self.orient_indices[l1,l2]
pair_cost = self.orient_cost[e,idpair]
cost = (l1!=l2)*pair_cost
#return (l1!=l2)*(1-cl[e])*0.1
#return (l1!=l2)*self.binary[e,1]*0.1
#y = l1!=l2
#return self.binary[e, y]*pair_cost
print e, l1, l2, cost
return cost
#sol, en = fastPD.fastPD_callback(unary, edges, cost_function(binary), debug=True)
cost_function = CostFunction(
#binary=binary,
orient_indices=self.orient_indices,
orient_cost=orient_cost,
)
sol, en = fastPD.fastPD_callback(unary, edges, cost_function, debug=True)
'''
wpairs = orient_cost
from rwsegment.mrf import trw
sol, en = trw.TRW_general(
unary, edges, wpairs, niters=1000, verbose=True)
labels = self.labelset[sol]
imsol = np.ones(im.shape, dtype=np.int32)*20
imsol[tuple(points.T)] = labels
io_analyze.save(outdir + 'imseeds.hdr', imsol)
## classify sol
gtlabels = seg[tuple(points.T)]
priorlabels = self.labelset[np.argmin(unary,axis=1)]
err_prior = 1 - np.sum(gtlabels==priorlabels)/float(len(points))
err = 1 - np.sum(gtlabels==labels)/float(len(points))
logger.info('error in prior sol: {}%'.format(err_prior*100))
logger.info('error in sol: {}%'.format(err*100))
import ipdb; ipdb.set_trace()
## start segmenting
sol,y = rwsegment.segment(
nim,
seeds=seeds,
labelset=self.labelset,
weight_function=self.weight_function,
**self.params
)
## compute Dice coefficient per label
dice = compute_dice_coef(sol, seg,labelset=self.labelset)
logger.info('Dice: {}'.format(dice))
if not config.debug:
io_analyze.save(outdir + 'sol.hdr', sol.astype(np.int32))
np.savetxt(
outdir + 'dice.txt', np.c_[dice.keys(),dice.values()],fmt='%d %.8f')
