3D measuring system based on color-encoded and its errors analysis

The function of a 3D measuring system is realized using the color-encoded technique and the digital projection technique. In this 3D measuring system, a color pattern composed of RGB components is created by software on a computer and then projected to an object by a digital projection system controlled by the computer. The image of the object is captured by a CCD color digital camera positioned at an angle different from that of the digital projection system. The color of each pixel determined by the proportion of its primary color, red, green, and blue (RGB) has a one-to-one correspondence with the projection angle. The depth image is obtained by computer decoding and calculating the color image captured.