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How to Label Data — Create ML for Object Detection is an easy way to train your own machine learning models. The new Create ML app just announced at WWDC 2019, is an incredibly easy way. All that’s required is dragging a folder containing your training data into the tool and Create ML does the rest of the heavy lifting. We need to create an annotations.json with the coordinates of where the objects are. This allows us to draw bounding bounding rectangles on our training images.