Calculate the Output size in Convolution layer [closed]

Solution 1:

you can use this formula [(W−K+2P)/S]+1.

• W is the input volume - in your case 128
• K is the Kernel size - in your case 5
• P is the padding - in your case 0 i believe
• S is the stride - which you have not provided.

So, we input into the formula:

Output_Shape = (128-5+0)/1+1

Output_Shape = (124,124,40)

NOTE: Stride defaults to 1 if not provided and the 40 in (124, 124, 40) is the number of filters provided by the user.

Solution 2:

You can find it in two ways: simple method: input_size - (filter_size - 1)

W - (K-1)
Here W = Input size
            K = Filter size
            S = Stride
            P = Padding

But the second method is the standard to find the output size.

Second method: (((W - K + 2P)/S) + 1)
        Here W = Input size
        K = Filter size
        S = Stride
        P = Padding