filtering structured light data detecting the second bounce

Filtering Structured Light Data Detecting the Second Bounce

Authors: John Palmateer

Boeing Commercial Airplane Group

Scott SandwithNew River Kinematics

2002 Coordinate Measurement System CommitteeProvidence, RI

Coordinate Measurement System

CommitteeProvidence, RI

Palmateer and Sandwith

Filtering Structured Light Data: Detecting the Second BounceFiltering Structured Light Data: Detecting the Second Bounce

Introduction Filtering Structured Light Data

• Primary and Secondary Reflections• Noise Reduction Filtering• JWP Row-Column Filter• Plane Angle Dependence• Application: 3D Inspection

Automation • Conclusions – Summary





Filter OFF Filter ON

Secondaryreflection

Discontinuitynoise

Data clippedfrom spheres

ScannerMeasurements confusing primary

and secondary reflections

Filter Results





Primary and Secondary Reflections

Laser

Camera

Laser image

Secondarylaser spots

Primarylaser spots

Intersection ofcamera LOS with

secondary reflection





Noise Reduction Filtering

• Systematic Noise– In-Plane with Laser and

Part Edge• Filter Properties

– Plane Angle– Array n x n





JWP Row-Column Filter (1 of 2)

Before After





JWP Row-Column Filter





JWP Row-Column Filter (2 of 2)

Before

After





Plane Angle Dependence

15 degree filter 20 degree filter





Application 3D Inspection Automation





Filtering Structured Light Data

filtering structured light data detecting the second bounce

Documents

bounce authors