Simultaneous geometry and color texture acquisition using a single-chip color camera

Song Zhang; Shing-Tung Yau

doi:10.1117/12.792003

11 August 2008 Simultaneous geometry and color texture acquisition using a single-chip color camera

Song Zhang, Shing-Tung Yau

Proceedings Volume 7063, Interferometry XIV: Techniques and Analysis; 70630M (2008) https://doi.org/10.1117/12.792003
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

Capturing 3-D geometry and the perfectly aligned color texture simultaneously is crucial for diverse fields including entertainment, target recognition, and computer graphics. However, it is very challenging for a conventional technique because of a number of problems related to color. Previous researchers rely heavily on using two cameras: a black-and-white(B/W) camera to measure the geometry, and a color camera to capture the color texture. However, aligning the color image with the 3-D geometry point by point remains difficult. In this research, we propose a novel technique that uses a single-chip color camera to capture both geometry and color texture simultaneously. A projector projects B/W fringe patterns onto the object, and a color camera captures the raw fringe images with Bayer mosaic patterns. A phase-shifting algorithm is used for our system because of one of its merits: retrieving phase pixel-by-pixel. Therefore, the intensity variations between neighboring pixels do not significantly affect the measurement. Moreover, the same set of fringe images is also used to calculate the B/W texture image, which is further converted into a color image using a demosaicing algorithm. Therefore, the same set of fringe images are used to generate the 3-D geometry as well as the color texture image simultaneously. A hardware system was developed to verify the performance of the proposed technique. Experiments demonstrated that this technique can successfully measure both geometry and color texture of the color objects.

Citation Download Citation

Song Zhang and Shing-Tung Yau "Simultaneous geometry and color texture acquisition using a single-chip color camera", Proc. SPIE 7063, Interferometry XIV: Techniques and Analysis, 70630M (11 August 2008); https://doi.org/10.1117/12.792003

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