Title:
SYSTEM AND METHOD FOR EXTRACTING A 3D SHAPE OF A HOT METAL SURFACE
Document Type and Number:
WIPO Patent Application WO/2013/008972
Kind Code:
A1
Abstract:
The present invention relates to a system, and to a method, for extracting a 3D shape of a hot metal surface, and more particularly, to a system for extracting a 3D shape of a hot metal surface, comprising: a light source unit emitting four types of light, i.e. two types of light each having different wave bandwidths that are different from a wave bandwidth emitted by a hot target object, and two other types of light having the same wave bandwidths as the above-described two types of light, respectively, so that the types of light having the same bandwidths are polarized in different directions so as not to interfere with one another; an image acquisition unit simultaneously emitting the four types of light, polarized from the light source, onto the target object so as to acquire 2D images of the target object; and an image processing unit using a photometric stereo technique so as to combine the 2D images acquired by the image acquisition unit and extract a 3D shape of the surface of the target object. The present invention also relates to a method for extracting a 3D shape of the surface of a hot metal using the system. According to the present invention, 3D shape information on surface defects of hot steel products which cannot be contacted can be provided, and on the basis of said information appropriate measures can be taken in advance with respect to products which have defects or defective portions, thus significantly contributing to product quality control and the reduction of product production costs.
Inventors:
JANG YU JIN (KR)
Application Number:
PCT/KR2011/005219
Publication Date:
January 17, 2013
Filing Date:
July 15, 2011
Export Citation:
Assignee:
UNIV DONGGUK GYEONGJU CAMPUS IND ACAD COOP FOUND (KR)
JANG YU JIN (KR)
JANG YU JIN (KR)
International Classes:
G06T15/00; H04N13/02; H04N5/262; H04N13/00
Foreign References:
| KR100239223B1 | 2000-01-15 | |||
| JP2007017401A | 2007-01-25 | |||
| KR101012691B1 | 2011-02-09 |
Attorney, Agent or Firm:
MYUNG MOON IP & LAW FIRM (KR)
특허법인 명문 (KR)
특허법인 명문 (KR)
Download PDF:
Claims: