System and method for detecting tooth cracks via surface contour imaging

摘要

A method for imaging the surface of a tooth, the method executed at least in part on a computer records a first set of images of the tooth, wherein each image in the first set of images is illuminated according to a pattern oriented in a first direction. A second set of images of the tooth are recorded, wherein each image in the second set of images is illuminated according to a pattern oriented in a second direction that is shifted more than 10 degrees with respect to the first direction. A first contour image is reconstructed according to the recorded first set of images and a second contour image according to the recorded second set of images. A residual image is formed as a combination of the first and second contour images. The residual image is analyzed and surface conditions of the tooth reported.

主权项

1. A method for imaging the surface of a tooth comprising:
a computer, at least in part, for executing the method;recording a first set of 2-D images of the tooth, wherein each image in the first set of images is illuminated according to a fringe pattern generator oriented in a first direction;recording a subsequent different second set of 2-D images of the tooth, wherein each image in the second set of images is illuminated according to a fringe pattern generator oriented in a second direction that is shifted more than 10 degrees with respect to the first direction;reconstructing a first 3-D contour image according to the recorded first set of images and a second 3-D contour image according to the recorded second set of images;forming a 3-D residual image as a subtraction operation between the first and second 3-D contour images; andanalyzing the 3-D residual image;detecting a crack on the tooth by applying a line model algorithm; anddisplaying surface conditions of the tooth.