Abstract
Keras is a neural network calculation library for Python environment. It enables implementation of deep learning related methods by relatively simple codes. Keras enables implementation of various methods from simple to state-of-the-art methods, such as methods proposed in the MICCAI conference. Also, it accelerates research and development on methods, which is important point for deep learning researches. Keras is quite useful library for research propose. This paper introduces how to implement an image classification program using convolutional neural network on Keras.