In this paper, we propose a method to find
optimal parameters for decolorization using
convolutional neural networks. Decolorization is a
technique for converting color images into gray
images. The conventional decolorization methods
have a problem that the parameter can not be
determined automatically. The proposed method
automatically finds optimal parameters with a deep
neural network. In the experiment, the proposed
method generates a visually pleasing gray image
compared to the conventional method.