Tutorial_Coded_Light_Projection

Experiments

Introduction

Classification

Time-multiplexing

Spatial codification

Direct codification

Time-multiplexing

•The time-multiplexing paradigm consists of projecting a series of light patterns so that every encoded point is identified with the sequence of intensities that receives

•The most common structure of the patterns is a sequence of stripes increasing its length by the time à single-axis encoding

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•Advantages:

–high resolution à a lot of 3D points

–High accuracy (order of mm)

–Robustness against colorful objects (using binary patterns)

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•Drawbacks:

–Static objects only

–Large number of patterns à High computing time

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Pattern 1

Pattern 2

Pattern 3

Projected over time

Example: 3 binary-encoded patterns which allows the measuring surface to be divided in 8 sub-regions

Conclusions