Title:
THREE-DIMENSIONAL SHAPE MEASUREMENT METHOD AND DEVICE AND RECORD MEDIUM
Document Type and Number:
Japanese Patent JP3417377
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To achieve practical three-dimensional shape measurement by combining at least one light source and a camera.
SOLUTION: A control means 253 repeats a processing for picking up an image with cameras 203 and 204 by shifting the phase value of a sinusoidal wave light pattern from light projectors 201 and 202 by 2 π/4 at a time for four times, a phase calculation means 210 inputs an image signal and outputs a phase signal 13 for each pixel from an image group that is shot by the sinusoidal wave light pattern with a different phase, absolute phase determination means 215-220 input two of phase signals 15-18, determine the absolute phase value of a pixel position for determining the absolute phase, and outputs the absolute phase signal, and an absolute phase conversion means 221 inputs a phase signal and an absolute phase signal that are switched by a three-dimensional coordinates calculation control signal 33, refers to the absolute phase signal, and converts the phase value at the pixel position where the absolute phase in the phase signal has not been determined is converted to an absolute phase, a three-dimensional coordinates conversion means 222 inputs an absolute phase conversion signal 32 and a three-dimensional coordinates calculation control signal 33 and outputs a three-dimensional coordinates signal 34, and a three-dimensional coordinates synthesis means 226 inputs three-dimensional coordinates signals 35-38, synthesizes four shape information, and outputs a synthesis three-dimensional coordinates signal 39.
Inventors:
Rui Ishiyama
Application Number:
JP2000082414A
Publication Date:
June 16, 2003
Filing Date:
March 23, 2000
Export Citation:
Assignee:
NEC
International Classes:
G01B11/24; G01B11/245; G01B11/25; G01B11/255; G01B11/00; G06T1/00; (IPC1-7): G01B11/24; G01B11/245; G01B11/25
Domestic Patent References:
| JP2000149024A | ||||
| JP11118443A | ||||
| JP4278406A | ||||
| JP8138056A | ||||
| JP1096606A | ||||
| JP4220510A | ||||
| JP6478104A | ||||
| JP10160422A | ||||
| JP942940A |
Attorney, Agent or Firm:
Asamichi Kato