🚀 Feature

For creating API around models it would be very useful to add a to_json() method for inference results on class Detections.

Motivation

Creating a flask app to expose inferencing, will need to implement a to_json() method but preferable to wrap around a standardised result.

Pitch

Ideally something like:

detections = model(img, size=640)
return jsonify({"detections": detections.to_json()})

Additional context

Can be used in #2662