I want to take the snap of an object and get the 3D coordinates of the respective pixels of that snap.
Tango provides a set of examples to do the exact same thing:
Unity AR example: https://github.com/googlesamples/tango-examples-unity/tree/master/UnityExamples
Java AR example: https://github.com/googlesamples/tango-examples-java/tree/master/AugmentedRealitySample
C++ AR plane finding example: https://github.com/googlesamples/tango-examples-c/tree/master/plane-fitting-jni-example