What is the difference between shuffle in fit_generator and shuffle in flow_from_directory?
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I am using Keras to create a deep learning model and I would like to know that what is the difference between shuffle argument in fit_generator() method and shuffle argument in flow_from_directory() method?
machine-learning python deep-learning keras tensorflow
edited Nov 6 '18 at 11:33
today
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asked Nov 6 '18 at 6:46
NoranNoran
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bumped to the homepage by Community♦ 11 hours ago
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add a comment |
$begingroup$
I am using Keras to create a deep learning model and I would like to know that what is the difference between shuffle argument in fit_generator() method and shuffle argument in flow_from_directory() method?
machine-learning python deep-learning keras tensorflow
edited Nov 6 '18 at 11:33
today
1054
asked Nov 6 '18 at 6:46
NoranNoran
32011
$endgroup$
bumped to the homepage by Community♦ 11 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
$begingroup$
I am using Keras to create a deep learning model and I would like to know that what is the difference between shuffle argument in fit_generator() method and shuffle argument in flow_from_directory() method?
machine-learning python deep-learning keras tensorflow
edited Nov 6 '18 at 11:33
today
1054
asked Nov 6 '18 at 6:46
NoranNoran
32011
$endgroup$
I am using Keras to create a deep learning model and I would like to know that what is the difference between shuffle argument in fit_generator() method and shuffle argument in flow_from_directory() method?
machine-learning python deep-learning keras tensorflow
machine-learning python deep-learning keras tensorflow
edited Nov 6 '18 at 11:33
today
1054
asked Nov 6 '18 at 6:46
NoranNoran
32011
edited Nov 6 '18 at 11:33
today
1054
asked Nov 6 '18 at 6:46
NoranNoran
32011
edited Nov 6 '18 at 11:33
today
1054
edited Nov 6 '18 at 11:33
today
1054
edited Nov 6 '18 at 11:33
today
1054
1054
asked Nov 6 '18 at 6:46
NoranNoran
32011
asked Nov 6 '18 at 6:46
NoranNoran
32011
asked Nov 6 '18 at 6:46
NoranNoran
32011
32011
bumped to the homepage by Community♦ 11 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 11 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
add a comment |
1 Answer
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$begingroup$
From fit_generator() documentation:
shuffle: Boolean. Whether to shuffle the order of the batches at the beginning of each epoch. Only used with instances of
Sequence
(keras.utils.Sequence). Has no effect whensteps_per_epochis not
None.
So if you are using a generator and set steps_per_epoch it would have no effect. In case of using a Sequence generator, it would get the batches in different order at each epoch. For example, in first epoch it might get my_seq[0] and then my_seq[1] and then my_seq[2] (and so on) and in the second epoch it might get my_seq[2] and then my_seq[0] and then my_seq[1] and so on for the next epochs (i.e. note that my_seq[i] is the i-th batch generated by the Sequence generator we have defined).
From flow_from_directory() documentation:
shuffle: Whether to shuffle the data (default:
True)
It is not clear when and how shuffling is done. So we must take a look at the source code. By doing so, we find out that flow_from_directory() method returns an instance of DirectoryIterator class which in its docstring we can see the following:
shuffle: Boolean, whether to shuffle the data between epochs.
So it would shuffle all of the data (i.e. list of all the training images to be read at each epoch) at the beginning of each epoch.
answered Nov 6 '18 at 9:38
todaytoday
1054
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add a comment |
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1 Answer
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$begingroup$
From fit_generator() documentation:
shuffle: Boolean. Whether to shuffle the order of the batches at the beginning of each epoch. Only used with instances of
Sequence
(keras.utils.Sequence). Has no effect whensteps_per_epochis not
None.
So if you are using a generator and set steps_per_epoch it would have no effect. In case of using a Sequence generator, it would get the batches in different order at each epoch. For example, in first epoch it might get my_seq[0] and then my_seq[1] and then my_seq[2] (and so on) and in the second epoch it might get my_seq[2] and then my_seq[0] and then my_seq[1] and so on for the next epochs (i.e. note that my_seq[i] is the i-th batch generated by the Sequence generator we have defined).
From flow_from_directory() documentation:
shuffle: Whether to shuffle the data (default:
True)
It is not clear when and how shuffling is done. So we must take a look at the source code. By doing so, we find out that flow_from_directory() method returns an instance of DirectoryIterator class which in its docstring we can see the following:
shuffle: Boolean, whether to shuffle the data between epochs.
So it would shuffle all of the data (i.e. list of all the training images to be read at each epoch) at the beginning of each epoch.
answered Nov 6 '18 at 9:38
todaytoday
1054
$endgroup$
add a comment |
$begingroup$
From fit_generator() documentation:
shuffle: Boolean. Whether to shuffle the order of the batches at the beginning of each epoch. Only used with instances of
Sequence
(keras.utils.Sequence). Has no effect whensteps_per_epochis not
None.
So if you are using a generator and set steps_per_epoch it would have no effect. In case of using a Sequence generator, it would get the batches in different order at each epoch. For example, in first epoch it might get my_seq[0] and then my_seq[1] and then my_seq[2] (and so on) and in the second epoch it might get my_seq[2] and then my_seq[0] and then my_seq[1] and so on for the next epochs (i.e. note that my_seq[i] is the i-th batch generated by the Sequence generator we have defined).
From flow_from_directory() documentation:
shuffle: Whether to shuffle the data (default:
True)
It is not clear when and how shuffling is done. So we must take a look at the source code. By doing so, we find out that flow_from_directory() method returns an instance of DirectoryIterator class which in its docstring we can see the following:
shuffle: Boolean, whether to shuffle the data between epochs.
So it would shuffle all of the data (i.e. list of all the training images to be read at each epoch) at the beginning of each epoch.
answered Nov 6 '18 at 9:38
todaytoday
1054
$endgroup$
add a comment |
$begingroup$
From fit_generator() documentation:
shuffle: Boolean. Whether to shuffle the order of the batches at the beginning of each epoch. Only used with instances of
Sequence
(keras.utils.Sequence). Has no effect whensteps_per_epochis not
None.
So if you are using a generator and set steps_per_epoch it would have no effect. In case of using a Sequence generator, it would get the batches in different order at each epoch. For example, in first epoch it might get my_seq[0] and then my_seq[1] and then my_seq[2] (and so on) and in the second epoch it might get my_seq[2] and then my_seq[0] and then my_seq[1] and so on for the next epochs (i.e. note that my_seq[i] is the i-th batch generated by the Sequence generator we have defined).
From flow_from_directory() documentation:
shuffle: Whether to shuffle the data (default:
True)
It is not clear when and how shuffling is done. So we must take a look at the source code. By doing so, we find out that flow_from_directory() method returns an instance of DirectoryIterator class which in its docstring we can see the following:
shuffle: Boolean, whether to shuffle the data between epochs.
So it would shuffle all of the data (i.e. list of all the training images to be read at each epoch) at the beginning of each epoch.
answered Nov 6 '18 at 9:38
todaytoday
1054
$endgroup$
From fit_generator() documentation:
shuffle: Boolean. Whether to shuffle the order of the batches at the beginning of each epoch. Only used with instances of
Sequence
(keras.utils.Sequence). Has no effect whensteps_per_epochis not
None.
So if you are using a generator and set steps_per_epoch it would have no effect. In case of using a Sequence generator, it would get the batches in different order at each epoch. For example, in first epoch it might get my_seq[0] and then my_seq[1] and then my_seq[2] (and so on) and in the second epoch it might get my_seq[2] and then my_seq[0] and then my_seq[1] and so on for the next epochs (i.e. note that my_seq[i] is the i-th batch generated by the Sequence generator we have defined).
From flow_from_directory() documentation:
shuffle: Whether to shuffle the data (default:
True)
It is not clear when and how shuffling is done. So we must take a look at the source code. By doing so, we find out that flow_from_directory() method returns an instance of DirectoryIterator class which in its docstring we can see the following:
shuffle: Boolean, whether to shuffle the data between epochs.
So it would shuffle all of the data (i.e. list of all the training images to be read at each epoch) at the beginning of each epoch.
answered Nov 6 '18 at 9:38
todaytoday
1054
answered Nov 6 '18 at 9:38
todaytoday
1054
answered Nov 6 '18 at 9:38
todaytoday
1054
answered Nov 6 '18 at 9:38
todaytoday
1054
1054
add a comment |
add a comment |
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