Device and method for measuring three-dimensional shape

Patent metadata

Field	Value
Publication number	US-2016335472-A1
Application number	US-201515110494-A
Country	US
Kind code	A1
Filing date	Jan 8, 2015
Priority date	Jan 10, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

A method for measuring a three-dimensional shape includes the steps of: forming a pattern on a light irradiated to an object from a light source unit installed in an electronic device by a pattern unit installed in the electronic device; generating image data by photographing the object to which the light on which the pattern is formed is irradiated by a camera unit installed in the electronic device; generating phase data for the object using the image data, and generating, using the phase data by a data generation unit, feature value data for a feature value of the object; and determining, by a determination unit, whether the feature value data is identical to pre-stored reference value data using the feature value data and the pre-stored reference value data.

First claim

What is claimed is:

1 . A device for measuring a three-dimensional shape, the device comprising:
a light source unit; a pattern unit for forming a pattern on light radiated from the light source unit; a camera unit for generating image data by photographing an object irradiated with the light formed with the pattern; and a data generation unit for generating phase data of the object using the image data and generating feature value data of the object using the phase data, wherein the light source unit, the pattern unit, the camera unit and the data generation unit are installed in an electronic device.

2 . The device of claim 1 , wherein the pattern unit comprises:
a first filter for forming a first pattern on the light radiated from the light source unit and passing through the pattern unit, a second filter for forming a second pattern on the light radiated from the light source unit and passing through the pattern unit, and a third filter for forming a third pattern on the light radiated from the light source unit and passing through the pattern unit.

3 . The device of claim 2 , wherein the first filter, the second filter and the third filter are arranged in a circular fashion.

4 . The device of claim 3 , wherein the device further comprises a moving unit for sequentially arranging the first filter, the second filter and the third filter at the front of the light source unit by rotationally moving the pattern unit.

5 . The device of claim 2 , wherein the first filter, the second filter and the third filter are arranged in a row.

6 . The device of claim 5 , wherein the device further comprises a moving unit for sequentially arranging the first filter, the second filter and the third filter at the front of the light source unit by linearly moving the pattern unit.

7 . The device of claim 1 , wherein the pattern unit comprises a pattern indication device for indicating filters for forming the first pattern, the second pattern and the third pattern on the light radiated from the light source unit and passing through the pattern unit.

8 . The device of claim 1 , wherein the pattern unit comprises:
a cylinder lens for collecting the light radiated from the light source unit, a rotational polygon mirror for redirecting the light collected through the cylinder lens while rotating in one direction, and a filter for forming a pattern on the light redirected by the rotational polygon mirror and passing through the pattern unit.

9 . The device of claim 1 , wherein the pattern unit comprises at least one slit for forming a pattern on the light radiated from the light source unit and passing through the pattern unit.

10 . The device of claim 1 , wherein the device further comprises a vibration unit having a vibration weight for generating vibration and a rotation unit for rotating the vibration weight in one direction.

11 . The device of claim 1 , wherein the light source unit comprises:
a first light source unit, a second light source unit, and a third light source unit; and the pattern unit comprises: a first pattern unit disposed at the front of the first light source unit to form a first pattern on the radiated light, a second pattern unit disposed at the front side of the second light source unit to form a second pattern on the radiated light, and a third pattern unit disposed at the front of the third light source unit to form a third pattern on the radiated light.

12 . The device of claim 1 , wherein the pattern unit is disposed at the front of the light source unit and the camera unit.

13 . The device of claim 1 , wherein the object is a finger of a subject to be measured, and the phase data is phase data of a fingerprint of the finger.

14 . The device of claim 13 , wherein the device further comprises a determination unit for determining whether the feature value data and pre-stored reference value data match or not.

15 . The device of claim 1 , wherein the object is at least a part of a body or a skin tissue of a subject to be measured.

16 . A method of measuring a three-dimensional shape, the method comprising the steps of:
forming, by a pattern unit installed in an electronic device, a pattern on light radiated from a light source unit installed in the electronic device to an object; generating, by a camera unit installed in the electronic device, image data by photographing the object irradiated with the light formed with the pattern; and generating, by a data generation unit installed in the electronic device, phase data of the object using the image data and generating feature value data on a feature value of the object using the phase data.

17 . A device for measuring a three-dimensional shape, the device comprising:
a light source unit; a pattern unit for forming a pattern on light radiated from the light source unit; a camera unit for generating image data by photographing a finger of a user irradiated with the light formed with the pattern; a data generation unit for generating phase data of the finger of the user using the image data and generating feature value data of the finger of the user using the phase data; and a determination unit for determining whether the feature value data and pre-stored reference value data match or not.

18 . A device for measuring a three-dimensional shape, the device comprising:
a light source unit; a beam splitter unit for splitting light radiated from the light source unit; a reference mirror unit for reflecting light incident from the beam splitter unit; a camera unit for generating OCT (Optical Coherence Tomography) image data by photographing light incident on an object from the beam splitter unit and reflected by the object and the light reflected by the reference mirror unit; a data generation unit for generating phase data of the object using the image data and generating feature value data of a feature value of the object using the phase data; and a determination unit for determining whether the feature value and pre-stored reference value data match or not.

19 . The device of claim 18 , wherein the determination unit determines whether the object is a finger based on the feature value of the object, and if a foreign material other than the finger is included, the determination unit determines that the object is an artificial fingerprint.

Assignees

• Koh Young Tech Inc

Inventors

• Lee Hyunki
• Koh Kwangill

Classifications

• G06V40/1324

  by using geometrical optics, e.g. using prisms (G06V40/1312 takes precedence) · CPC title

• G01B9/02091 Primary

  Tomographic interferometers, e.g. based on optical coherence · CPC title

• G06V10/145

  Illumination specially adapted for pattern recognition, e.g. using gratings · CPC title

• G01B11/2531

  using several gratings, projected with variable angle of incidence on the object, and one detection device · CPC title

• G06T2207/10101

  Optical tomography; Optical coherence tomography [OCT] · CPC title