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Three-dimensional measurement technology has recently been used for various applications such as human modeling, cultural properties recording, machine inspection of industrial parts, and robot vision. The light-section method and coded structured light projection method are well-known active measurement methods that can accurately obtain three-dimensional shapes by projecting light patterns on the measurement space. These active measurement methods have been applied to practical systems in real scenes because they are robust regarding texture patterns on the surfaces of the objects to be observed, and have advantages in calculation time and accuracy. Following recent improvements in integration technology, three-dimensional image measurement systems that can operate at a rate of 30 fps or more have already been developed [1, 2]. Inmany application fields, dynamic analysis tools to observe dynamic changes in high-speed phenomena in three-dimensional shapes at high frame rates are required. Off-line high-speed cameras that can capture images at 1000 fps or more have already been put into practical use for analyzing high-speed phenomena; however, many of them can only record high-speed phenomena as two-dimensional image sequences.

A Coded Structured Light Projection Method for High-Frame-Rate 3D Image Acquisition