The field of image processing is very effective and high performance quantitative method in science and engineering, in particular the Image recognition in the area of computer vision.
Don't forget about OpenCV library (https://opencv.org/) - run very, very fast! Convolution Neural Networks (CNN) - run very, very slow! No more CNN for me.
As usually, this paper provides many general known ideas about ANN and very poor real math explanation. No programming code or libraries were provided at all. This paper did not help me in anything at all – too much talking!