A method of determining hand features information using both two dimensional (2D) image data and three dimensional (3D) image data is described. In one implementation, a method includes: receiving a 2D image frame; receiving 3D image data corresponding to the 2D image frame; using the 3D image data corresponding to the 2D image frame, transforming the 2D image frame; and using the 3D image data corresponding to the 2D image frame, scaling the 2D image frame, where the transforming and scaling results in a normalized 2D image frame, where the normalized 2D image frame is a scaled and transformed version of the 2D image frame, and where the scaling and transforming is performed using a computer.