Is there a standard gesture for resetting scale on a pinch-zoom canvas?

I've got an android app with a view of a diagram that can be dragged, rotated and scaled using pinch zoom and other similar gestures. Often times I find that I want to reset back to a canonical view of the diagram. Is there an agreed upon gesture for doing this besides just having a reset button? I was thinking double tapping, but I haven't seen it in other apps.