Abstract

For structured-light range imaging, color stripes can be used for  increasing the number of distinguishable light patterns compared to binary BW  stripes. Therefore, an appropriate use of color patterns can reduce the number of  light projections and range imaging is achievable in single video frame or in  “one shot ”. On the other hand, the re liability and range resolution attainable  from color stripes is generally lower than those from multiply projected binary  BW patterns since color contrast is affected by object color reflectance and  ambient light. This paper presents new methods for selecting stripe colors and  designing multiple-stripe patterns for “ one-shot ” and “two-shot ” imaging. We  show that maximizing color contrast between the stripes in one-shot imaging  reduces the ambiguities resulting from colored object surfaces and limitations in  sensor/projector resolution. Two-shot imaging adds an extra video frame and  maximizes the color contrast between the first and second video frames to  diminish the ambiguities even further. Experimental results demonstrate the  effectiveness of the presented one-shot and two-shot color-stripe imaging  schemes.