011-lec-002. max pooling @ Depth of summed output from convolution layer is determined, by number of filters You can extract one layer from summed output from convolution layer Pooling means resizing(sampling) extracted one layer image from above step And then, I iterate above process (extract one layer from summed output and resizing it), and then sum resized layers up @ 4*4 image, 2*2 pooling filter, 2 stride output will be 2*2 There are many ways to extract one value from 2*2 being slided part Most used ways is "max pooling", which extracts highest value from 4 values