Detecting User Input Provided To A Projected User Interface

Apparatus and methods for determining whether a user intends to provide an input using an image of a control appearing on a surface. An apparatus may include a first camera to capture two or more images of the surface, and a unit to determine whether various conditions are true. A first condition is that a particular number of pixels classified as skin color are present within one cell of the two or more images. A cell has a location substantially coinciding with the image of the control. A second condition is that the pixels classified as skin color persist for at least a particular time period. A third condition is that the pixels classified as skin color have a first shape. Additional conditions are disclosed. A signal indicative of an intent of a user to provide an input may be provided if the each of the first, second, and third conditions are true.