NameError: name 'transform_matrix_offset_center' is not defined

[songyu3044]

i meet this question
NameError: name 'transform_matrix_offset_center' is not defined
please help me

[YANRUI121]

I had the same problem, and when I added the following function definition which is from keras.preprocessing.image.ImageDataGenerator, the error was fixed.

def transform_matrix_offset_center(matrix, x, y):
o_x = float(x) / 2 + 0.5
o_y = float(y) / 2 + 0.5
offset_matrix = np.array([[1, 0, o_x], [0, 1, o_y], [0, 0, 1]])
reset_matrix = np.array([[1, 0, -o_x], [0, 1, -o_y], [0, 0, 1]])
transform_matrix = np.dot(np.dot(offset_matrix, matrix), reset_matrix)
return transform_matrix

Traceback (most recent call last):
File "train.py", line 237, in
label_suffix=label_suffix, ignore_label=ignore_label, label_cval=label_cval)
File "train.py", line 169, in train
class_weight=class_weight
File "/home/yanrui/anaconda3/lib/python3.7/site-packages/keras/legacy/interfaces.py", line 91, in wrapper
return func(*args, **kwargs)
File "/home/yanrui/anaconda3/lib/python3.7/site-packages/keras/engine/training.py", line 1418, in fit_generator
initial_epoch=initial_epoch)
File "/home/yanrui/anaconda3/lib/python3.7/site-packages/keras/engine/training_generator.py", line 181, in fit_generator
generator_output = next(output_generator)
File "/home/yanrui/anaconda3/lib/python3.7/site-packages/keras/utils/data_utils.py", line 601, in get
six.reraise(*sys.exc_info())
File "/home/yanrui/anaconda3/lib/python3.7/site-packages/six.py", line 693, in reraise
raise value
File "/home/yanrui/anaconda3/lib/python3.7/site-packages/keras/utils/data_utils.py", line 595, in get
inputs = self.queue.get(block=True).get()
File "/home/yanrui/anaconda3/lib/python3.7/multiprocessing/pool.py", line 657, in get
raise self._value
File "/home/yanrui/anaconda3/lib/python3.7/multiprocessing/pool.py", line 121, in worker
result = (True, func(*args, **kwds))
File "/home/yanrui/anaconda3/lib/python3.7/site-packages/keras/utils/data_utils.py", line 401, in get_index
return _SHARED_SEQUENCES[uid][i]
File "/home/yanrui/anaconda3/lib/python3.7/site-packages/keras_preprocessing/image/iterator.py", line 65, in getitem
return self._get_batches_of_transformed_samples(index_array)
File "/home/yanrui/src/Keras-FCN/utils/SegDataGenerator.py", line 260, in _get_batches_of_transformed_samples
x, y = self.seg_data_generator.random_transform(x, y)
File "/home/yanrui/src/Keras-FCN/utils/SegDataGenerator.py", line 461, in random_transform
transform_matrix = transform_matrix_offset_center(
NameError: name 'transform_matrix_offset_center' is not defined

[songyu3044]

I've solved this problem, but I'm sorry. I forgot how to solve it at that time. As I recall, you maybe install keras 2.1.6 or check keras-contrib is right. if you do this ,you cant solve it .you can add my wechat: zm2634039766