# What is the input size of Alex net

In the paper ImageNet Classification with Deep Convolutional Neural Networks, the size of input image is 224x224. The following figure shows the input size.

From caffe, deploy.prototxt file from the directory of the bvlc_alexnet says that the input size is 227x227.

Why is the input size different?

• I don't have reputation to comment so I am asking a small follow-up. does the 10 represent batch size and 3 represent the RGB channels? – Shreyas Pimpalgaonkar Jun 11 '18 at 11:21