1. A method for depth mapping, comprising: projecting a pattern of infrared optical radiation onto an object; capturing an infrared image of the pattern on the object using a first image sensor, and processing the infrared image alone to generate pattern-based depth data with respect to the object; capturing a color image of the object using a second image sensor, wherein the projected pattern does not appear in the color image, and processing the color image together with the infrared image to generate stereoscopic depth data with respect to the object; and combining the pattern-based depth data with the stereoscopic depth data to create a depth map of the object.