In one embodiment a method for triggering input commands of a program run on a computing system is provided. The method initiates with monitoring a field of view in front of a capture device. Then, an input object is identified within the field of view. The detected input object is analyzed for changes in shape. Next, a change in the input object is detected. Then, an input command is triggered at the program run on the computing system. The triggering is a result of the detected change in the input object. An input detection program and a computing system are also provided.