You only look once (YOLO) is a state-of-the-art, real-time object detection system. YOLO is extremely fast and accurate. A single neural network is applied to the full image. This network divides the image into regions and predicts bounding boxes and probabilities for each region.
These bounding boxes are weighted by the predicted probabilities. The model has several advantages over classifier-based systems. It looks at the whole image at test time so its predictions are informed by global context in the image. It also makes predictions with a single network evaluation.