How to handle maxpool layer backpropagation with recurring max values in same position
$begingroup$
Say I have a layer a:
3 4 2
1 5 0
8 6 4
The maxpool using 2x2 filter is:
5 5
8 6
Thus the derivative of the max pooling layer is (in respect to layer a):
0 0 0
0 1 0
1 1 0
Now say doing backpropagation I have the following deltas:
-1.4 0.8
0.2 0.3
I know that -1.4 and 0.8 is associated with 5. While 0.2 and 0.3 corresponds to 8 and 6 respectively.
Currently what I have done, for repeating max values in the same position, I just sum up the corresponding deltas associated with that position, i.e., -1.4 + 0.8 = -0.6. So the final delta being back propagated is the following matrix.
0 0 0 0
0 -0.6 0
0.2 0.3 0
Please let me know if this is the correct procedure.
neural-network deep-learning cnn backpropagation
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Jam1Jam1
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$begingroup$
Say I have a layer a:
3 4 2
1 5 0
8 6 4
The maxpool using 2x2 filter is:
5 5
8 6
Thus the derivative of the max pooling layer is (in respect to layer a):
0 0 0
0 1 0
1 1 0
Now say doing backpropagation I have the following deltas:
-1.4 0.8
0.2 0.3
I know that -1.4 and 0.8 is associated with 5. While 0.2 and 0.3 corresponds to 8 and 6 respectively.
Currently what I have done, for repeating max values in the same position, I just sum up the corresponding deltas associated with that position, i.e., -1.4 + 0.8 = -0.6. So the final delta being back propagated is the following matrix.
0 0 0 0
0 -0.6 0
0.2 0.3 0
Please let me know if this is the correct procedure.
neural-network deep-learning cnn backpropagation
asked yesterday
Jam1Jam1
101
New contributor
Jam1 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
Say I have a layer a:
3 4 2
1 5 0
8 6 4
The maxpool using 2x2 filter is:
5 5
8 6
Thus the derivative of the max pooling layer is (in respect to layer a):
0 0 0
0 1 0
1 1 0
Now say doing backpropagation I have the following deltas:
-1.4 0.8
0.2 0.3
I know that -1.4 and 0.8 is associated with 5. While 0.2 and 0.3 corresponds to 8 and 6 respectively.
Currently what I have done, for repeating max values in the same position, I just sum up the corresponding deltas associated with that position, i.e., -1.4 + 0.8 = -0.6. So the final delta being back propagated is the following matrix.
0 0 0 0
0 -0.6 0
0.2 0.3 0
Please let me know if this is the correct procedure.
neural-network deep-learning cnn backpropagation
asked yesterday
Jam1Jam1
101
New contributor
Jam1 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
Say I have a layer a:
3 4 2
1 5 0
8 6 4
The maxpool using 2x2 filter is:
5 5
8 6
Thus the derivative of the max pooling layer is (in respect to layer a):
0 0 0
0 1 0
1 1 0
Now say doing backpropagation I have the following deltas:
-1.4 0.8
0.2 0.3
I know that -1.4 and 0.8 is associated with 5. While 0.2 and 0.3 corresponds to 8 and 6 respectively.
Currently what I have done, for repeating max values in the same position, I just sum up the corresponding deltas associated with that position, i.e., -1.4 + 0.8 = -0.6. So the final delta being back propagated is the following matrix.
0 0 0 0
0 -0.6 0
0.2 0.3 0
Please let me know if this is the correct procedure.
neural-network deep-learning cnn backpropagation
neural-network deep-learning cnn backpropagation
asked yesterday
Jam1Jam1
101
New contributor
Jam1 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
Jam1Jam1
101
New contributor
Jam1 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
Jam1Jam1
101
New contributor
Jam1 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked yesterday
Jam1Jam1
101
asked yesterday
Jam1Jam1
101
101
New contributor
Jam1 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Jam1 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Jam1 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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