Train MNIST classifier

This workflow trains a simple convolutional neural network (CNN) on the MNIST dataset via TensorFlow.

In order to run the example, please make sure you have the following KNIME extensions installed:

* KNIME Deep Learning - TensorFlow Integration (Labs)
* KNIME Image Processing (Community Contributions Trusted)
* KNIME Image Processing - Deep Learning Extension (Community Contributions Trusted)

You also need a local Python installation that includes TensorFlow. Please refer to https://www.knime.com/deeplearning/tensorflow for installation recommendations and further information.

Acknowledgements:

The architecture of the created network was taken but slightly changed from https://www.tensorflow.org/tutorials/layers.

The enclosed pictures are from the MNIST dataset (http://yann.lecun.com/exdb/mnist/) [1].

[1] Y. LeCun, L. Bottou, Y. Bengio, and P. Haffner. "Gradient-based learning applied to document recognition." Proceedings of the IEEE, 86(11):2278-2324, November 1998.