REST and RPC APIs provided by Vision API provide robust pre-trained machine learning models. Classify photos fast into millions of predetermined categories by assigning labels to each one. Build useful metadata into your image database by using object and face detection, reading printed and handwritten text, and more. Optical character recognition (OCR), face and landmark detection, image labelling, and the tagging of explicit content are just a few of the vision detection capabilities that Google Vision enables developers to include quickly into apps.