Proc. SPIE. 5634, Advanced Sensor Systems and Applications II
KEYWORDS: Cameras, Digital Light Processing, Projection systems, 3D metrology, CCD cameras, Commercial off the shelf technology, 3D image processing, Digital micromirror devices, RGB color model, Imaging systems
A 3D measuring system on structure light which uses color-encoded technique and digital projection technique to realize 3D measuring is introduced. In this measuring system, a color-encoded pattern that is created by a new method 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 position 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. Decoding and calculating for the color image captured, the 3D coordinates of the points on the object surface can be obtained.
Proc. SPIE. 5633, Advanced Materials and Devices for Sensing and Imaging II
KEYWORDS: Commercial off the shelf technology, Cameras, Digital Light Processing, Projection systems, 3D metrology, 3D image processing, Imaging systems, Digital imaging, Computing systems, CCD cameras
A color-encoded technique for 3D measurement is presented in this paper. In this technique, a color pattern that is composed of RGB components is created by software on a computer screen and projected to an object by a digital light processing, which is 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 of the image has a one-to-one correspondence with the projection angle. The 3D depth map of the object is obtained by way of computer decoding and calculating of the color image captured. This paper mainly introduces the errors analysis and the computer simulation method. The results of the example shows that the relatively errors of the 3D measuring system are smaller than 1%. Simulations have been performed and the results validate the method.