System and method for 3D imaging using structured light illumination
OwnerLaurence G. Hassebrook, Daniel L. Lau +1inventors
InventorsLaurence G. Hassebrook, Daniel L. Lau, Henry G. Dietz
Life of this patent
Estimating the term…
Abstract
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.
Claims20
A method for a processing device to determine a two dimensional (2D) handprint image from a three dimensional (3D) data of the handprint, comprising:
- processing one or more handprint images captured with a structured light illumination technique to determine 3D coordinates in the one or more handprint images;
- extracting by the processing device handprint surface information using the 3D coordinates, wherein the handprint surface information includes ridge height information;
- generating a 2D handprint image from a set of the 3D coordinates;
- mapping by the processing device the handprint surface information onto the 2D handprint image;
- and
- translating the ridge height information to a grey-scale image index.
A processing device for generating a two dimensional (2D) print image from three-dimensional (3D) data, comprising:
- at least one processor operable to:
- determine 3D coordinates of a print;
- generate 3D coordinates of a smooth print surface that approximates a shape of the print;
- extract print surface information by comparing a set of the 3D coordinates of the smooth print surface with the 3D coordinates of the print, wherein the print surface information includes ridge height information;
- generate a 2D print image from the set of the 3D coordinates of the smooth print surface;
- map the print surface information onto the 2D print image;
- and
- translate the ridge height information to a grey-scale in the 2D print image.
A method for a processing device to generate a two dimensional (2D) print image from three-dimensional (3D) data, comprising:
- determining 3D coordinates of a print;
- generating 3D coordinates of a smooth print surface that approximates a shape of the print;
- extracting print surface information by comparing a set of the 3D coordinates of the smooth print surface with the 3D coordinates of the print, wherein the print surface information includes ridge height information;
- generating a 2D print image from the set of the 3D coordinates of the smooth print surface;
- mapping the print surface information onto the 2D print image;
- and
- translating the ridge height information to a grey-scale in the 3D print image.
A processing device operable to determine a two dimensional (2D) handprint image from a three dimensional (3D) data of the handprint, comprising:
- at least one processor operable to:
- process one or more handprint images captured with a structured light illumination technique to determine 3D coordinates in the one or more handprint images;
- extract ridge height information using the 3D coordinates;
- generate a 2D handprint image from a set of the 3D coordinates, wherein the 2D handprint image includes a mapping of the ridge height information onto the 2D handprint image using a grey-scale index.
Dependencies are inferred from the claim text.