Title:
METHOD FOR MATCHING FEATURE POINTS OF PLANAR ARRAY OF FOUR-PHASE UNIT AND MEASUREMENT METHOD ON BASIS THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/006246
Kind Code:
A1
Abstract:
The invention belongs to the field of optical electronic measurement, and disclosed are a method for matching feature points of a planar array of a four-phase unit and a measurement method on the basis thereof. The matching method comprises: using one image plane among four image planes (a, b, c, d) as a base image plane (a), and finding, for a feature point (P a) on the base image plane (a), all matching points (P b, P b1) which match the feature point (P a) on an image plane (b) adjacent to the base image plane (a) in a transverse direction; finding, for the feature point (Pa) on the base image plane (a), all matching points (Pc, Pc2}) which match the feature point (a) on an image plane (c) adjacent to the base image plane (a) in a longitudinal direction; rematching the all matching points (Pb, Pb1, Pc, Pc2) found in both the transverse and longitudinal directions, and finding all sub-matching point groups ((Pb, Pc), (Pb1, Pc2)); finding on a diagonal position image plane (d) matching points (Pd, Pd3) corresponding to the feature point (Pa) on the base image plan (a) and the found all sub-matching point groups ((Pb, Pc), (Pb1, Pc2)); and determining uniqueness matching point groups (Pa, Pb, Pc, Pd) corresponding to a same viewpoint (P) in the four image planes (a, b, c, d). For each uniqueness matching point group (Pa, Pb, Pc, Pd), three-dimensional coordinates of the viewpoint (P) may be calculated according to image coordinates of the matching point group (Pa, Pb, Pc, Pd) and parameters of a camera system. As long as a collected image is clear enough in any lighting condition, a viewed object that is imaged on an image of a planar array of a four-phase unit and has a certain image feature may undergo three-dimensional measurement with the exact same matching method and measurement method.
Inventors:
CAO LIANG (CN)
Application Number:
PCT/CN2016/088420
Publication Date:
January 11, 2018
Filing Date:
July 04, 2016
Export Citation:
Assignee:
CAO LIANG (CN)
International Classes:
G01B11/00; G01B11/24
Foreign References:
| CN105627926A | 2016-06-01 | |||
| CN102679961A | 2012-09-19 | |||
| US20050075585A1 | 2005-04-07 | |||
| JPH08285532A | 1996-11-01 |
Other References:
TU, LIFEN ET AL.: "Real Scene 3D Modelling Based on Four-Camera Vision System", JOURNAL OF APPLIED OPTICS (CHINA), vol. 37, no. 1, 31 January 2016 (2016-01-31), pages 13 - 14
FENG, ZEXI ET AL.: "3D Reconstruction Algorithm for Computer Vision Using Four Camera Array", JOURNAL OF COMPUTER APPLICATIONS (CHINA), vol. 31, no. 4, 30 April 2011 (2011-04-30), pages 1043 - 1046
See also references of EP 3285232A4
FENG, ZEXI ET AL.: "3D Reconstruction Algorithm for Computer Vision Using Four Camera Array", JOURNAL OF COMPUTER APPLICATIONS (CHINA), vol. 31, no. 4, 30 April 2011 (2011-04-30), pages 1043 - 1046
See also references of EP 3285232A4
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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