How do I find output size of a network?

Question

Sunny

2022年3月7日 21:02

The input to a convolutional layer of a neural network is an image of size $128\times 128\times 3.$

$ 40$ convolutional filters of size $5\times 5$ are applied to it. Would you get an output? If no then why not? If yes, what will be the output size?

Simon Larsson · Accepted Answer · 2019年2月19日 14:24

Yes, and it would be $124 \times 124 \times40$.

To calculate the output dimensions:

$(dim_x - filterdim_x + 1) \times (dim_y - filterdim_y + 1) \times filters$

in your case:

$(128 - 5 + 1) \times (128 - 5 + 1) \times 40 = 124 \times 124 \times40$