A Practial Control Technique for Projection Patterns in 3-D Measurement

C. Lu and G. Cho (Japan)


3-D measurement, Pattern projection, Control, Color image analysis, Intensity modulation, and Stereo vision.


A new projection pattern control technique is presented in an attempt to solve the problem where an image having an ideal intensity/color distribution cannot be photographed when measurement conditions, such as object color or object surface reflection, change. The proposed technique can adjust the color and intensity distribution of a projection pattern automatically, according to changes in the measurement conditions. An image with an ideal intensity distribution can then be obtained in a short time, approximately three projections on average. Thus, the speed, robustness, and practicality of 3-D image measurement can be improved.

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