May 13, 2019a cnn will learn to recognize patterns across space while rnn is useful for solving temporal data problems. Jun 12, 2020fully convolution networks a fully convolution network (fcn) is a neural network that only performs convolution (and subsampling or upsampling) operations. Aug 6, 2019a convolutional neural network (cnn) that does not have fully connected layers is called a fully convolutional network (fcn).