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Surface measurement error correction method and system based on brox optical flow estimation

A technology of measurement error and correction method, applied in measurement devices, optical devices, instruments, etc., can solve problems such as difficult operation, achieve the effect of simple experimental process, solve projection errors, and shorten measurement time

Inactive Publication Date: 2021-10-19
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of projected fringe phase shift correction needs to predict the distribution of projected fringes in advance, which is difficult to operate, and requires different corrections for different experimental optical paths

Method used

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  • Surface measurement error correction method and system based on brox optical flow estimation
  • Surface measurement error correction method and system based on brox optical flow estimation
  • Surface measurement error correction method and system based on brox optical flow estimation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1, this embodiment provides a surface shape measurement error correction method based on Brox optical flow estimation;

[0057] The error correction method of surface shape measurement based on Brox optical flow estimation, including:

[0058] S101: using a projector to project the grating stripes onto a reference plane at a set angle;

[0059] S102: Using the camera to respectively collect the first fringe image before adding the measured object and the second fringe image after adding the measured object on the reference plane;

[0060] S103: Using the Brox optical flow algorithm to process the first fringe image and the second fringe image to obtain the observation point displacement;

[0061] S104: Establish a spatial relationship formula between the projector, the camera, and the displacement of the observation point with the reference plane as the reference system, and the height of the measured object, and obtain the height distribution of the measure...

Embodiment 2

[0200] Embodiment 2, this embodiment provides a surface shape measurement error correction device based on Brox optical flow estimation;

[0201] Surface shape measurement error correction device based on Brox optical flow estimation, including:

[0202] a projection module configured to: use a projector to project the grating stripes onto a reference plane at a set angle;

[0203] The acquisition module is configured to: respectively collect the first fringe image on the reference plane before adding the measured object and the second fringe image after adding the measured object by using the camera;

[0204] A processing module configured to: process the first fringe image and the second fringe image using the Brox optical flow algorithm to obtain the observation point displacement;

[0205] Establishing a module, which is configured to: establish a spatial relationship formula between the projector, the camera, and the displacement of the observation point with the referen...

Embodiment 3

[0207] Embodiment 3. This embodiment also provides an electronic device, including a memory, a processor, and computer instructions stored in the memory and run on the processor. When the computer instructions are executed by the processor, the computer instructions in Embodiment 1 are completed. described method.

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Abstract

The invention discloses a surface shape measurement error correction method and system based on Brox optical flow estimation, including: using a projector to project grating stripes onto a reference plane at a set angle; The first fringe image and the second fringe image after adding the measured object; use the Brox optical flow algorithm to process the first fringe image and the second fringe image to obtain the displacement of the observation point; establish a projector with the reference plane as the reference system, The spatial relationship formula between the displacement of the camera and the observation point and the height of the measured object is used to obtain the height distribution of the measured object according to the spatial relationship formula; the height distribution of the measured object is corrected to obtain the corrected height distribution of the measured object.

Description

technical field [0001] The present disclosure relates to the technical field of surface shape measurement, in particular to a surface shape measurement error correction method and system based on Brox optical flow estimation. Background technique [0002] The statements in this section merely mention background art related to the present disclosure and do not necessarily constitute prior art. [0003] Three-dimensional object surface profile measurement is an important means to obtain the morphological characteristics of objects, and it is also the basis for recording, comparing and replicating the morphological characteristics of objects. Three-dimensional surface shape measurement technology has great significance and broad application prospects in the fields of cultural relics protection, three-dimensional measurement, computer vision, surface detection, medical diagnosis and so on. The projection grid method is often used in the three-dimensional object surface profile ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/25G01B11/06
CPCG01B11/0608G01B11/2527G01B21/045
Inventor 唐钰欣孙平高延红
Owner SHANDONG NORMAL UNIV