Я пишу обучающий код для TwoStream-IQA , который является двухпоточной сверточной нейронной сетью.Эта модель прогнозирует показатель качества для исправлений, оцениваемых по двум потокам сети.В приведенном ниже обучении я использовал набор тестовых данных, представленный в приведенной выше ссылке на GitHub.
Код обучения указан ниже:
## prepare training data
test_label_path = 'data_list/test.txt'
test_img_path = 'data/live/'
test_Graimg_path = 'data/live_grad/'
save_model_path = '/models/nr_sana_2stream.model'
patches_per_img = 256
patchSize = 32
print('-------------Load data-------------')
final_train_set = []
with open(test_label_path, 'rt') as f:
for l in f:
line, la = l.strip().split() # for debug
tic = time.time()
full_path = os.path.join(test_img_path, line)
Grafull_path = os.path.join(test_Graimg_path, line)
f = Image.open(full_path)
Graf = Image.open(Grafull_path)
img = np.asarray(f, dtype=np.float32)
Gra = np.asarray(Graf, dtype=np.float32)
img = img.transpose(2, 0, 1)
Gra = Gra.transpose(2, 0, 1)
img1 = np.zeros((1, 3, Gra.shape[1], Gra.shape[2]))
img1[0, :, :, :] = img
Gra1 = np.zeros((1, 3, Gra.shape[1], Gra.shape[2]))
Gra1[0, :, :, :] = Gra
patches = extract_patches(img, (3, patchSize, patchSize), patchSize)
Grapatches = extract_patches(Gra, (3, patchSize, patchSize), patchSize)
X = patches.reshape((-1, 3, patchSize, patchSize))
GraX = Grapatches.reshape((-1, 3, patchSize, patchSize))
temp_slice1 = [X[int(float(index))] for index in range(256)]
temp_slice2 = [GraX[int(float(index))] for index in range(256)]
##############################################
for j in range(len(temp_slice1)):
temp_slice1[j] = xp.array(temp_slice1[j].astype(np.float32))
temp_slice2[j] = xp.array(temp_slice2[j].astype(np.float32))
final_train_set.append((temp_slice1[j], temp_slice2[j], int(la)))
final_train_set = np.asarray(final_train_set)
##############################################
#
print('--------------Done!----------------')
print('--------------Iterator!----------------')
train_iter = iterators.SerialIterator(final_train_set, batch_size=4)
optimizer = optimizers.Adam()
optimizer.use_cleargrads()
optimizer.setup(model)
updater = training.StandardUpdater(train_iter, optimizer, device=0)
print('--------------Trainer!----------------')
trainer = training.Trainer(updater, (50, 'epoch'), out='result')
trainer.extend(extensions.LogReport())
trainer.extend(extensions.PrintReport(['epoch', 'iteration', 'main/loss', 'elapsed_time']))
print('--------------Running trainer!----------------')
trainer.run()
Но код выдает ошибку:
Exception in main training loop: Unsupported dtype object
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/chainer/training/trainer.py", line 307, in run
update()
File "/usr/local/lib/python2.7/dist-packages/chainer/training/updaters/standard_updater.py", line 165, in update
self.update_core()
File "/usr/local/lib/python2.7/dist-packages/chainer/training/updaters/standard_updater.py", line 171, in update_core
in_arrays = self.converter(batch, self.device)
File "/usr/local/lib/python2.7/dist-packages/chainer/dataset/convert.py", line 149, in concat_examples
return to_device(device, _concat_arrays(batch, padding))
File "/usr/local/lib/python2.7/dist-packages/chainer/dataset/convert.py", line 37, in to_device
return cuda.to_gpu(x, device)
File "/usr/local/lib/python2.7/dist-packages/chainer/backends/cuda.py", line 288, in to_gpu
return _array_to_gpu(array, device_, stream)
File "/usr/local/lib/python2.7/dist-packages/chainer/backends/cuda.py", line 336, in _array_to_gpu
return cupy.asarray(array)
File "/usr/local/lib/python2.7/dist-packages/cupy/creation/from_data.py", line 60, in asarray
return core.array(a, dtype, False)
File "cupy/core/core.pyx", line 2174, in cupy.core.core.array
File "cupy/core/core.pyx", line 2207, in cupy.core.core.array
Will finalize trainer extensions and updater before reraising the exception.
Traceback (most recent call last):
File "train.py", line 126, in <module>
trainer.run()
File "/usr/local/lib/python2.7/dist-packages/chainer/training/trainer.py", line 321, in run
six.reraise(*sys.exc_info())
File "/usr/local/lib/python2.7/dist-packages/chainer/training/trainer.py", line 307, in run
update()
File "/usr/local/lib/python2.7/dist-packages/chainer/training/updaters/standard_updater.py", line 165, in update
self.update_core()
File "/usr/local/lib/python2.7/dist-packages/chainer/training/updaters/standard_updater.py", line 171, in update_core
in_arrays = self.converter(batch, self.device)
File "/usr/local/lib/python2.7/dist-packages/chainer/dataset/convert.py", line 149, in concat_examples
return to_device(device, _concat_arrays(batch, padding))
File "/usr/local/lib/python2.7/dist-packages/chainer/dataset/convert.py", line 37, in to_device
return cuda.to_gpu(x, device)
File "/usr/local/lib/python2.7/dist-packages/chainer/backends/cuda.py", line 288, in to_gpu
return _array_to_gpu(array, device_, stream)
File "/usr/local/lib/python2.7/dist-packages/chainer/backends/cuda.py", line 336, in _array_to_gpu
return cupy.asarray(array)
File "/usr/local/lib/python2.7/dist-packages/cupy/creation/from_data.py", line 60, in asarray
return core.array(a, dtype, False)
File "cupy/core/core.pyx", line 2174, in cupy.core.core.array
File "cupy/core/core.pyx", line 2207, in cupy.core.core.array
ValueError: Unsupported dtype object
Я использовал набор данных из ссылки на github, представленной выше.Я новичок в Chainer, пожалуйста, помогите !!