import numpy as np
def Pooling(array,activation):
assert type(array) == type(list())
return [MAXPooling(x,activation) for x in array]
def MAXPooling(Array,activation=1, ksize=2):
assert len(Array) % ksize == 0
V2list = np.vsplit(Array, len(Array) / ksize)
VerticalElements = list()
HorizontalElements = list()
for x in V2list:
H2list = np.hsplit(x, len(x[0]) / ksize)
HorizontalElements.clear()
for y in H2list:
# y should be a two-two square
HorizontalElements.append(y.max())
VerticalElements.append(np.array(HorizontalElements))
return np.array(np.array(VerticalElements)/activation,dtype=int)
