# if we are to reduce the spatial size, apply a CONV layer to the shortcut
	if red:
	   shortcut = Conv2D(K, (1, 1), strides=stride, use_bias=False,
	   		kernel_regularizer=l2(reg))(act1)

	# add together the shortcut and the final CONV
	x = add([conv3, shortcut])

	# return the addition as the output of the ResNet module
	return x