A Convolutional Neural Network is a neural network that is spezifically designed for image recognition. Thanks to this particular design specific characteristics of an object in an image are identified, which form the basis for the identification of objects.
A milestone in the history of image recognition by artificial intelligence is a project of the Google X Labs. In 2012, a network of computers was fed with about 10 million images for training the AI algorithm; after three days, the "Google Brain" succeeded in identifying not only people but also cats in these images.