If I understand the article, that problem is alleviated by illuminating the object with only a single color of light at a time in rapid succession, using the sc

If I understand the article, that problem is alleviated by illuminating the object with only a single color of light at a time in rapid succession, using the screen of the phone. Presumably, the camera would filter out ambient light from the result by sampling that first. It is certainly not going to be precise, but it's quite an achievement if they can may it work within the limits of the device.