System and method for 3D imaging using structured light illumination

摘要

A biometrics system captures and processes a handprint image using a structured light illumination to create a 2D representation equivalent of a rolled inked handprint. A processing unit calculates 3D coordinates of the hand from the plurality of images and maps the 3D coordinates to a 2D flat surface to create a 2D representation equivalent of a rolled inked handprint.

主权项

1. A three dimensional (3D) imaging system using a structured light illumination technique, comprising:
at least one projection unit for projecting a series of structured light patterns onto a 3D object, wherein the series of structured light patterns includes:
a first series of triangle waveforms at a first frequency each in a first color, wherein each of the triangle waveforms in the first series has a different phase;a second series of triangle waveforms at a second frequency each in a second color, wherein each of the triangle waveforms in the second series has a different phase; one or more cameras for capturing at least one image of the 3D object with each structured light pattern in the series of structured light patterns projected onto the 3D object; and a processing unit for calculating coordinates of the 3D object from the images based on a phase value determined from one or more of the series of triangle waveforms.