def __init__(self,
which_set,
label_type=None,
azimuth=False,
rotation=False,
texture=False,
center=False,
contrast_normalize=False,
seed=132987):
assert which_set in ['train', 'valid', 'test']
assert label_type in [
None, 'label', 'azimuth', 'rotation', 'texture_id'
]
# load data
fname = '${PYLEARN2_DATA_PATH}/mnistplus/mnistplus'
if azimuth:
fname += '_azi'
if rotation:
fname += '_rot'
if texture:
fname += '_tex'
data = load(fname + '.pkl')
# get images and cast to floatX
data_x = np.cast[config.floatX](data['data'])
data_x = data_x[MNISTPlus.idx[which_set]]
if contrast_normalize:
meanx = np.mean(data_x, axis=1)[:, None]
stdx = np.std(data_x, axis=1)[:, None]
data_x = (data_x - meanx) / stdx
if center:
data_x -= np.mean(data_x, axis=0)
# get labels
data_y = None
if label_type is not None:
data_y = data[label_type]
# convert to float for performing regression
if label_type in ['azimuth', 'rotation']:
data_y = np.cast[config.floatX](data_y / 360.)
# retrieve only subset of data
data_y = data_y[MNISTPlus.idx[which_set]]
# create view converting for retrieving topological view
view_converter = dense_design_matrix.DefaultViewConverter((48, 48))
# init the super class
super(MNISTPlus, self).__init__(X=data_x,
y=data_y,
y_labels=np.max(data_y) + 1,
view_converter=view_converter)
assert not contains_nan(self.X)
def __init__(self, which_set, center=False):
assert which_set in ['train', 'test']
path = "${PYLEARN2_DATA_PATH}/cifar100/cifar-100-python/" + which_set
obj = serial.load(path)
X = obj['data']
assert X.max() == 255.
assert X.min() == 0.
X = N.cast['float32'](X)
y = None #not implemented yet
if center:
X -= 127.5
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3))
super(CIFAR100, self).__init__(X=X, y=y, view_converter=view_converter)
assert not N.any(N.isnan(self.X))
self.y_fine = N.asarray(obj['fine_labels'])
self.y_coarse = N.asarray(obj['coarse_labels'])
def __init__(self, which_set, center=False, one_hot=False):
path = "${PYLEARN2_DATA_PATH}/mnist/mnist_rotation_back_image/" \
+ which_set
obj = serial.load(path)
X = obj['data']
X = N.cast['float32'](X)
y = N.asarray(obj['labels'])
self.one_hot = one_hot
if one_hot:
one_hot = N.zeros((y.shape[0], 10), dtype='float32')
for i in xrange(y.shape[0]):
one_hot[i, y[i]] = 1.
y = one_hot
if center:
X -= X.mean(axis=0)
view_converter = dense_design_matrix.DefaultViewConverter((28, 28, 1))
super(MNIST_rotated_background,
self).__init__(X=X, y=y, view_converter=view_converter)
assert not N.any(N.isnan(self.X))
def __init__(self, which_set, one_hot=False):
assert which_set in ['train', 'valid', 'test']
data = icml07.icml07_loaders()
data = data['rectangles']
data_x, data_y = data.load_from_numpy()
if which_set == 'train':
data_x = data_x[:1000]
data_y = data_y[:1000]
elif which_set == 'valid':
data_x = data_x[1000:1000 + 200]
data_y = data_y[1000:1000 + 200]
else:
data_x = data_x[1000 + 200:1000 + 200 + 50000]
data_y = data_y[1000 + 200:1000 + 200 + 50000]
assert data_x.shape[0] == data_y.shape[0]
self.one_hot = one_hot
if one_hot:
one_hot = numpy.zeros((data_y.shape[0], 2), dtype='float32')
for i in xrange(data_y.shape[0]):
one_hot[i, data_y[i]] = 1.
data_y = one_hot
view_converter = dense_design_matrix.DefaultViewConverter((28, 28, 1))
super(Rectangles, self).__init__(X=data_x,
y=data_y,
view_converter=view_converter)
assert not numpy.any(numpy.isnan(self.X))
def __init__(self, which_set, center=False, multi_target=False):
"""
:param which_set: one of ['train','test']
:param center: data is in range [0,256], center=True subtracts 127.5.
:param multi_target: load extra information as additional labels.
"""
assert which_set in ['train', 'test']
X = NORBSmall.load(which_set, 'dat')
# put things in pylearn2's DenseDesignMatrix format
X = numpy.cast['float32'](X)
X = X.reshape(-1, 2 * 96 * 96)
#this is uint8
y = NORBSmall.load(which_set, 'cat')
if multi_target:
y_extra = NORBSmall.load(which_set, 'info')
y = numpy.hstack((y[:, numpy.newaxis], y_extra))
if center:
X -= 127.5
view_converter = dense_design_matrix.DefaultViewConverter((96, 96, 2))
super(NORBSmall, self).__init__(X=X,
y=y,
view_converter=view_converter)
def __init__(self, which_set, which_experiment, start=None, stop=None, axes=('b', 0, 1, 'c'), preprocessor = None):
# note: there is no such thing as the cifar10 validation set;
# pylearn1 defined one but really it should be user-configurable
# (as it is here)
assert which_set in ['train', 'test']
assert which_experiment in ['S100', 'ADD3_10_S100', 'ADD3_10_S250', 'ADD3_ALL_S100', 'RM3_S100', 'RP3_S100']
self.experiment = which_experiment
data_dir = string_utils.preprocess('${PYLEARN2_DATA_PATH}')
experiment_folder_string = "experiment_"+string.lower(which_experiment)
path = os.path.join(data_dir,"cifar10",experiment_folder_string,which_set+".pkl")
meta_path = os.path.join(data_dir,"cifar10",experiment_folder_string,"meta")
self.axes = axes
# we also expose the following details:
self.img_shape = (3, 32, 32)
self.img_size = numpy.prod(self.img_shape)
meta = serial.load(meta_path)
#self.label_names = ['airplane', 'automobile', 'bird', 'cat', 'deer', 'dog', 'frog', 'horse', 'ship', 'truck']
self.label_names = meta['label_names']
self.n_classes = len(self.label_names)
obj = serial.load(path)
X = obj['data']
if(which_set == 'train'):
ntrain = X.shape[0]
if(which_set == 'test'):
ntest = X.shape[0]
assert X.max() == 255.
assert X.min() == 0.
X = numpy.cast['float32'](X)
y = numpy.asarray(obj['labels']).astype('uint8')
if which_set == 'test':
y = y.reshape((y.shape[0], 1))
if start is not None:
# This needs to come after the prepro so that it doesn't
# change the pixel means computed above for toronto_prepro
assert start >= 0
assert stop > start
assert stop <= X.shape[0]
X = X[start:stop, :]
y = y[start:stop, :]
assert X.shape[0] == y.shape[0]
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3), axes)
super(Experiment, self).__init__(X=X, y=y, y_labels=self.n_classes, view_converter=view_converter, axes=self.axes)
assert not contains_nan(self.X)
def __init__(self):
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3))
super(DebugDataset, self).__init__(X=N.asarray([[1.0, 0.0], [0.0,
1.0]]),
view_converter=view_converter)
assert not N.any(N.isnan(self.X))
def __init__(self):
X = 1. - N.load("/data/lisa/data/wiskott/wiskott_fish_layer0_15_standard_64x64_shuffled.npy")
view_converter = dense_design_matrix.DefaultViewConverter((64,64,1))
super(Wiskott,self).__init__(X = X, view_converter = view_converter)
assert not N.any(N.isnan(self.X))
def __init__(self, which_set, one_hot=False, axes=['b', 0, 1, 'c']):
"""
.. todo::
WRITEME
"""
self.args = locals()
assert which_set in self.data_split.keys()
path = serial.preprocess(
"${PYLEARN2_DATA_PATH}/ocr_letters/letter.data")
with open(path, 'r') as data_f:
data = data_f.readlines()
data = [line.split("\t") for line in data]
data_x = [map(int, item[6:-1]) for item in data]
data_letters = [item[1] for item in data]
data_fold = [int(item[5]) for item in data]
letters = list(numpy.unique(data_letters))
data_y = [letters.index(item) for item in data_letters]
if which_set == 'train':
split = slice(0, self.data_split['train'])
elif which_set == 'valid':
split = slice(self.data_split['train'], self.data_split['train'] +
self.data_split['valid'])
elif which_set == 'test':
split = slice(self.data_split['train'] + self.data_split['valid'],
(self.data_split['train'] +
self.data_split['valid'] +
self.data_split['test']))
data_x = numpy.asarray(data_x[split])
data_y = numpy.asarray(data_y[split])
data_fold = numpy.asarray(data_y[split])
assert data_x.shape[0] == data_y.shape[0]
assert data_x.shape[0] == self.data_split[which_set]
self.one_hot = one_hot
if one_hot:
one_hot = numpy.zeros(
(data_y.shape[0], len(letters)), dtype='float32')
for i in xrange(data_y.shape[0]):
one_hot[i, data_y[i]] = 1.
data_y = one_hot
view_converter = dense_design_matrix.DefaultViewConverter(
(16, 8, 1), axes)
super(OCR, self).__init__(
X=data_x, y=data_y, view_converter=view_converter)
assert not contains_nan(self.X)
self.fold = data_fold
def __init__(self):
path = "${PYLEARN2_DATA_PATH}/wiskott/wiskott"\
+ "_fish_layer0_15_standard_64x64_shuffled.npy"
X = 1. - load(path)
view_converter = dense_design_matrix.DefaultViewConverter((64, 64, 1))
super(Wiskott, self).__init__(X=X, view_converter=view_converter)
assert not N.any(N.isnan(self.X))
def __init__(self, which_set):
conf = utils.get_config()
paths = utils.get_paths()
region_size = conf['region_size']
self.h5file = tables.open_file(paths[which_set])
node = self.h5file.root.Data
axes = ('b', 0, 1, 'c')
channels = node.X.shape[1] / (region_size * region_size)
view_converter = dense_design_matrix.DefaultViewConverter(
(region_size, region_size, channels), axes)
super(BCDR, self).__init__(
X=node.X, view_converter=view_converter, y=node.y)
def __init__(self,
start=None,
stop=None,
shuffle=False,
rng=None,
seed=132987,
center=False,
scale=False,
axes=('b', 0, 1, 'c'),
preprocessor=None,
which_ds='kaggle'):
data_x, data_y = self.load_data(which=which_ds,
center=center,
scale=scale)
tfd = TFD('train', one_hot=1, scale=scale)
data_x = np.concatenate((data_x, tfd.X))
data_y = np.concatenate((data_y, tfd.y))
tfd = TFD('valid', one_hot=1, scale=scale)
data_x = np.concatenate((data_x, tfd.X))
data_y = np.concatenate((data_y, tfd.y))
if shuffle:
rng = rng if rng else np.random.RandomState(seed)
rand_idx = rng.permutation(len(data_x))
data_x = data_x[rand_idx]
data_y = data_y[rand_idx]
if start is not None or stop is not None:
if start is None:
start = 0
else:
assert start >= 0
if stop is None:
stop = -1
if stop != -1:
assert stop > start
data_x = data_x[start:stop]
data_y = data_y[start:stop]
if center:
data_x -= 0.5
self.axes = axes
view_converter = dense_design_matrix.DefaultViewConverter((48, 48, 1),
axes)
super(GoogleTFDDataset, self).__init__(X=data_x,
y=data_y,
view_converter=view_converter)
assert not np.any(np.isnan(self.X))
if preprocessor is not None:
preprocessor.apply(self)
def __init__(self, which_set=None, file=None, center = False, rescale = False, gcn = None, one_hot = False, start = None, stop = None, axes=('b', 0, 1, 'c'), toronto_prepro = False, preprocessor = None):
# note: there is no such thing as the cifar10 validation set;
# pylearn1 defined one but really it should be user-configurable
# (as it is here)
self.axes = axes
# we define here:
dtype = 'uint8'
ntrain = 0
nvalid = 0 # artefact, we won't use it
ntest = 300000
# we also expose the following details:
self.img_shape = (3,32,32)
self.img_size = N.prod(self.img_shape)
#self.n_classes = 10
#self.label_names = ['airplane', 'automobile', 'bird', 'cat', 'deer',
#'dog', 'frog','horse','ship','truck']
# prepare loading
#fnames = ['data_batch_%i' % i for i in range(1,6)]
#lenx = N.ceil((ntrain + nvalid) / 10000.)*10000
#x = N.zeros((lenx,self.img_size), dtype=dtype)
#y = N.zeros(lenx, dtype=dtype)
X=np.load(file).astype(np.float32)
# load train data
if center:
X -= 127.5
self.center = center
if rescale:
X /= 127.5
self.rescale = rescale
self.toronto_prepro = toronto_prepro
self.gcn = gcn
if gcn is not None:
gcn = float(gcn)
X = global_contrast_normalize(X, scale=gcn)
view_converter = dense_design_matrix.DefaultViewConverter((32,32,3), axes)
super(CIFAR10_TEST, self).__init__(X=X, view_converter=view_converter)
assert not np.any(np.isnan(self.X))
if preprocessor:
preprocessor.apply(self)
def __init__(self,
which_set,
center=False,
scale=False,
start=None,
stop=None,
axes=('b', 0, 1, 'c'),
preprocessor=None):
"""
A version of SVHN dataset that loads everything into the memory
instead of using pytables.
"""
assert which_set in self.mapper.keys()
self.__dict__.update(locals())
del self.self
path = '${PYLEARN2_DATA_PATH}/SVHN/format2/'
# load data
path = preprocess(path)
data_x, data_y = self.make_data(which_set, path)
# rescale or center if permitted
if center and scale:
data_x -= 127.5
data_x /= 127.5
elif center:
data_x -= 127.5
elif scale:
data_x /= 255.
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3),
axes)
super(SVHN_On_Memory, self).__init__(X=data_x,
y=data_y,
view_converter=view_converter)
if preprocessor:
if which_set in ['train', 'train_all', 'splitted_train']:
can_fit = True
else:
can_fit = False
preprocessor.apply(self, can_fit)
del data_x, data_y
gc.collect()
def __init__(self, which_set, center = False):
path = "${PYLEARN2_DATA_PATH}/mnist/mnist_rotation_back_image/"+which_set
obj = serial.load(path)
X = obj['data']
X = N.cast['float32'](X)
y = N.asarray(obj['labels'])
if center:
X -= X.mean(axis=0)
view_converter = dense_design_matrix.DefaultViewConverter((28,28,1))
super(MNIST,self).__init__(X = X, y = y, view_converter = view_converter)
assert not N.any(N.isnan(self.X))
def __init__(self,
start=None,
stop=None,
shuffle=False,
rng=None,
seed=132987,
center=False,
axes=('b', 0, 1, 'c'),
preprocessor=None):
path = "/data/lisa/data/faces/GoogleDataset/Clean/latest.pkl"
data = serial.load(path)
data_x = data[0]
data_y = data[1]
assert len(data_x) == len(data_y)
if shuffle:
rng = rng if rng else np.random.RandomState(seed)
rand_idx = rng.permutation(len(data_x))
data_x = data_x[rand_idx]
data_y = data_y[rand_idx]
if start is not None or stop is not None:
if start is None:
start = 0
else:
assert start >= 0
if stop is None:
stop = -1
if stop != -1:
assert stop > start
data_x = data_x[start:stop]
data_y = data_y[start:stop]
if center:
data_x -= 0.5
self.axes = axes
view_converter = dense_design_matrix.DefaultViewConverter((48, 48, 1),
axes)
super(GoogleDataset, self).__init__(X=data_x,
y=data_y,
view_converter=view_converter)
assert not np.any(np.isnan(self.X))
if preprocessor is not None:
preprocessor.apply(self)
def __init__(self,
path=None,
start=None,
stop=None,
shuffle=True,
rng=None,
seed=132987,
center=False,
scale=False,
axes=('b', 0, 1, 'c'),
preprocessor=None,
which_set='test'):
if path is None:
path = '/data/lisa/data/faces/EmotiW/preproc/'
path = '/Tmp/zumerjer/'
mode = 'r'
else:
mode = 'r'
path = preprocess(path)
#if which_set == 'valid':
# which_set = 'val'
file_n = "{}{}.h5".format(path, which_set)
if os.path.isfile(file_n):
make_new = False
else:
make_new = True
if make_new:
self.make_data(path, shuffle, rng, seed, which_set, start, stop)
self.h5file = tables.openFile(file_n, mode=mode)
data = self.h5file.getNode('/', "Data")
if not make_new and (start != None or stop != None):
raise ValueError("Ah ah")
self.axes = axes
view_converter = dense_design_matrix.DefaultViewConverter((96, 96, 3),
axes)
super(ComboDatasetPyTable,
self).__init__(X=data.X, y=data.y, view_converter=view_converter)
assert not np.any(np.isnan(self.X))
if preprocessor is not None:
preprocessor.apply(self)
def test_zero_image(self):
"""
Test on zero-value image if cause any division by zero
"""
X = as_floatX(np.zeros((5, 32 * 32 * 3)))
axes = ['b', 0, 1, 'c']
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3),
axes)
dataset = DenseDesignMatrix(X=X, view_converter=view_converter)
dataset.axes = axes
preprocessor = LeCunLCN(img_shape=[32, 32])
dataset.apply_preprocessor(preprocessor)
result = dataset.get_design_matrix()
assert isfinite(result)
def __init__(self, which_set, center=False):
#dear pylearn.datasets.cifar: there is no such thing as the cifar10 validation set. quit pretending that there is.
orig = cifar10.cifar10(ntrain=50000, nvalid=0, ntest=10000)
Xs = {'train': orig.train.x, 'test': orig.test.x}
X = N.cast['float32'](Xs[which_set])
if center:
X -= 127.5
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3))
super(CIFAR10, self).__init__(X=X, view_converter=view_converter)
assert not N.any(N.isnan(self.X))
def __init__(self, which_set, center=False):
orig = icml07.MNIST_rotated_background(n_train=10000,
n_valid=2000,
n_test=10000)
sets = {'train': orig.train, 'valid': orig.valid, 'test': orig.test}
X = numpy.cast['float32'](sets[which_set].x)
y = sets[which_set].y
view_converter = dense_design_matrix.DefaultViewConverter((28, 28, 1))
super(MNIST_rotated_background,
self).__init__(X=X, y=y, view_converter=view_converter)
assert not numpy.any(numpy.isnan(self.X))
def test_channel(self):
"""
Test if works fine withe different number of channel as argument
"""
rng = np.random.RandomState([1, 2, 3])
X = as_floatX(rng.randn(5, 32 * 32 * 3))
axes = ['b', 0, 1, 'c']
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3),
axes)
dataset = DenseDesignMatrix(X=X, view_converter=view_converter)
dataset.axes = axes
preprocessor = LeCunLCN(img_shape=[32, 32], channels=[1, 2])
dataset.apply_preprocessor(preprocessor)
result = dataset.get_design_matrix()
assert isfinite(result)
def __init__(self, which_set, center = False):
#dear pylearn.datasets.MNIST: there is no such thing as the MNIST validation set. quit pretending that there is.
orig = i_hate_python.train_valid_test(ntrain=60000,nvalid=0,ntest=10000)
Xs = {
'train' : orig.train.x,
'test' : orig.test.x
}
X = N.cast['float32'](Xs[which_set])
if center:
assert False
view_converter = dense_design_matrix.DefaultViewConverter((28,28,1))
super(MNIST,self).__init__(X = X, view_converter = view_converter)
assert not N.any(N.isnan(self.X))
def test_rgb_yuv():
"""
Test on a random image if the per-processor loads and works without
anyerror and doesn't result in any nan or inf values
"""
rng = np.random.RandomState([1, 2, 3])
X = as_floatX(rng.randn(5, 32 * 32 * 3))
axes = ['b', 0, 1, 'c']
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3),
axes)
dataset = DenseDesignMatrix(X=X, view_converter=view_converter)
dataset.axes = axes
preprocessor = RGB_YUV()
dataset.apply_preprocessor(preprocessor)
result = dataset.get_design_matrix()
assert isfinite(result)
def test_random_image(self):
"""
Test on a random image if the per-processor loads and works without
anyerror and doesn't result in any nan or inf values
"""
rng = np.random.RandomState([1, 2, 3])
X = as_floatX(rng.randn(5, 32 * 32 * 3))
axes = ['b', 0, 1, 'c']
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3),
axes)
dataset = DenseDesignMatrix(X=X, view_converter=view_converter)
dataset.axes = axes
preprocessor = LeCunLCN(img_shape=[32, 32])
dataset.apply_preprocessor(preprocessor)
result = dataset.get_design_matrix()
assert not np.any(np.isnan(result))
assert not np.any(np.isinf(result))
def __init__(self, which_set, multi_target=False):
"""
:param which_set: one of ['train', 'test'] :param multi_target: If
True, each label is an integer labeling the image catergory. If False,
each label is a vector: [category, instance, lighting, elevation,
azimuth]. All labels are given as integers. Use the categories,
elevation_degrees, and azimuth_degrees arrays to map from these
integers to actual values.
:param multi_target: If False, labels will be integers indicating
object category. If True, labels will be vectors of integers,
indicating [ category, instance, elevation, azimuth, lighting ].
"""
assert which_set in ['train', 'test']
self.which_set = which_set
X = SmallNORB.load(which_set, 'dat')
# Casts to the GPU-supported float type, using theano._asarray(), a
# safer alternative to numpy.asarray().
X = theano._asarray(X, theano.config.floatX)
# Formats data as rows in a matrix, for DenseDesignMatrix
X = X.reshape(-1, 2*96*96)
# This is uint8
y = SmallNORB.load(which_set, 'cat')
if multi_target:
y_extra = SmallNORB.load(which_set, 'info')
y = numpy.hstack((y[:, numpy.newaxis], y_extra))
view_converter = dense_design_matrix.DefaultViewConverter((2, 96, 96))
# TODO: let labels be accessible by key, like y.category, y.elevation,
# etc.
super(SmallNORB, self).__init__(X=X,
y=y,
view_converter=view_converter)
def __init__(self, which_set, center = False):
if which_set not in ['train','test']:
if which_set == 'valid':
raise ValueError("There is no such thing as the MNIST "
"validation set. MNIST consists of 60,000 train examples and 10,000 test"
" examples. If you wish to use a validation set you should divide the train "
"set yourself. The pylearn2 dataset implements and will only ever implement "
"the standard train / test split used in the literature.")
raise ValueError('Unrecognized which_set value "%s".' %
(which_set,)+'". Valid values are ["train","test"].')
path = "${PYLEARN2_DATA_PATH}/mnist/mnist-python/%s.pkl" % which_set
obj = serial.load(path)
X = obj['data']
X = N.cast['float32'](X)
y = N.asarray(obj['labels'])
assert len(X.shape) == 2
assert X.shape[1] == 784
if which_set == 'train':
assert X.shape[0] == 60000
elif which_set == 'test':
assert X.shape[0] == 10000
else:
assert False
if center:
X -= X.mean(axis=0)
view_converter = dense_design_matrix.DefaultViewConverter((28,28,1))
super(MNIST,self).__init__(X = X, y = y, view_converter = view_converter)
assert not N.any(N.isnan(self.X))
def __init__(self, which_set, center=False, multi_target=False):
assert which_set in ['train', 'test']
X = NORBSmall.load(which_set, 'dat')
# put things in pylearn2's DenseDesignMatrix format
X = np.cast['float32'](X)
X = X.reshape(-1, 2 * 96 * 96)
# this is uint8
y = NORBSmall.load(which_set, 'cat')
if multi_target:
y_extra = NORBSmall.load(which_set, 'info')
y = np.hstack((y[:, np.newaxis], y_extra))
if center:
X -= 127.5
view_converter = dense_design_matrix.DefaultViewConverter((96, 96, 2))
super(NORBSmall, self).__init__(X=X, y=y, y_labels=np.max(y) + 1,
view_converter=view_converter)
def __init__(self,
which_set,
center=False,
gcn=False,
one_hot=False,
seed=132987):
assert which_set in ['Train', 'Val']
self.rng = numpy.random.RandomState(seed)
self.which_set = which_set
self.center = center
self.gcn = gcn
self.one_hot = one_hot
(X, y), self.meta = load_all_frames(which_set)
## filter out pure-black images ###
X = (X / 255).astype(config.floatX)
y = y.astype(config.floatX)
if gcn:
goodidx = numpy.where(numpy.sum(X, axis=1) != 0)
meanx = numpy.mean(X, axis=1)[:, None]
stdx = numpy.std(X, axis=1)[:, None]
X[goodidx] = (X[goodidx] - meanx[goodidx]) / stdx[goodidx]
if center:
X -= numpy.mean(X, axis=0)
if one_hot:
one_hot = numpy.zeros((y.shape[0], 7), dtype='float32')
for i in xrange(y.shape[0]):
one_hot[i, y[i]] = 1.
y = one_hot
view_converter = dense_design_matrix.DefaultViewConverter((48, 48, 1))
super(EmotiwFaces, self).__init__(X=X,
y=y,
view_converter=view_converter)
def __init__(self, which_set, multi_target=False):
"""
:param which_set: one of ['train', 'test'] :param multi_target: If True,
each label is an integer labeling the image catergory. If False, each
label is a vector: [category, instance, lighting, elevation,
azimuth]. All labels are given as integers. Use the categories,
elevation_degrees, and azimuth_degrees arrays to map from these integers
to actual values.
:param multi_target: If False, labels will be integers indicating object
category. If True, labels will be vectors of integers, indicating [
category, instance, elevation, azimuth, lighting ].
"""
assert which_set in ['train', 'test']
self.which_set = which_set
X = SmallNORB.load(which_set, 'dat')
# put things in pylearn2's DenseDesignMatrix format
X = numpy.cast['float32'](X)
X = X.reshape(-1, 2 * 96 * 96)
#this is uint8
y = SmallNORB.load(which_set, 'cat')
if multi_target:
y_extra = SmallNORB.load(which_set, 'info')
y = numpy.hstack((y[:, numpy.newaxis], y_extra))
view_converter = dense_design_matrix.DefaultViewConverter((2, 96, 96))
# TODO: let labels be accessible by key, like y.category, y.elevation,
# etc.
super(SmallNORB, self).__init__(X=X,
y=y,
view_converter=view_converter)
def __init__(self, which_set, center=False, gcn=None):
assert which_set in ['train', 'test']
path = "${PYLEARN2_DATA_PATH}/cifar100/cifar-100-python/" + which_set
obj = serial.load(path)
X = obj['data']
assert X.max() == 255.
assert X.min() == 0.
X = N.cast['float32'](X)
y = None #not implemented yet
self.center = center
if center:
X -= 127.5
self.gcn = gcn
if gcn is not None:
assert isinstance(gcn, float)
X = (X.T - X.mean(axis=1)).T
X = (X.T / np.sqrt(np.square(X).sum(axis=1))).T
X *= gcn
view_converter = dense_design_matrix.DefaultViewConverter((32, 32, 3))
super(CIFAR100, self).__init__(X=X, y=y, view_converter=view_converter)
assert not N.any(N.isnan(self.X))
self.y_fine = N.asarray(obj['fine_labels'])
self.y_coarse = N.asarray(obj['coarse_labels'])
self.y = self.y_fine