Image annotation involves one or more of these techniques, which are supported by your data annotation tool, depending on its feature sets.

Image annotation is a type of data labeling that is sometimes called tagging, transcribing, or processing. You also can annotate videos continuously, as a stream, or frame by frame.

Image annotation marks the features you want your machine learning system to recognize, and you can use the images to train your model using supervised learning. Once your model is deployed, you want it to be able to identify those features in images that have not been annotated and, as a result, make a decision or take some action.