There are many tasks in image processing that can be solved with Convolutional Neural Networks (CNNs). One of these tasks is called image style transfer. The goal of image style transfer is to apply the style of one image to the content of another image. This way you can create an drawing showing you in the style of Van Gogh, for example.
I am going to explain how style can be extracted from one image and transferred to the content of another image in this article.
I also wrote an overview paper on Image Style Transfer using Convolutional Neural Networks for a computer vision seminar at my university.