Gesture recognition techniques

A method implemented by a computing device, the method comprising:

• via a sensor, capturing data corresponding to a physical environment;
• based at least in part on using the data corresponding to the physical environment, forming at least one model of a static physical object that models one or more objects in the physical environment;
• identifying contact between a dynamic object and the at least one model of the static physical object;
• and
• recognizing a gesture from the identified contact of the dynamic object with the at least one model of the static physical object to initiate an operation of the computing device.

An apparatus comprising:

• a camera configured to capture data of a physical environment of the camera;
• and
• one or more modules communicatively coupled to the camera and configured to perform operations comprising:
• based at least in part on using the data corresponding to the physical environment, forming at least one model of a static physical object that models one or more objects in the physical environment;
• identifying interaction of a dynamic object with the at least one model of the static physical object;
• and
• recognizing a gesture from the identified interaction of the dynamic object with the at least one model of the static physical object to initiate an operation of a computing device.