display object that pixel "hits"

Is there any way to do a “hit test” to determine which display object(s) a pixel hits? e.g., much like how Corona checks touch events, except for the test is done against a given (x,y) co-ordinate.

I guess I could check against all display objects, but then I’d have to traverse into display groups, and even worse, consider the shape of the display objects (which could be rounded rectangles, objects with masks, etc).

Corona does this already for touch events and it would be useful if this function were exposed for the programmer.

bjl
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