Master Thesis - Fachbereich Informatik

Contents
Acknowledgments iii
Abstract v
List of Tables xi
List of Figures xiii
1. Introduction 1
1.1. MachineVision-StateofArt.......................... 1
1.2. ProblemStatement................................ 3
1.3. Requirements................................... 4
1.4. RelatedWork................................... 5
1.5. ThesisOutline .................................. 6
2. Technical Background 9
2.1. VisualMeasurements............................... 9
2.1.1. AccuracyandPrecision ......................... 9
2.1.2. InverseProjectionProblem ....................... 10
2.1.3. CameraModels.............................. 10
2.1.4. CameraCalibration ........................... 13
2.2. Illumination.................................... 16
2.2.1. LightSources............................... 16
2.2.2. IncidentLighting............................. 18
2.2.3. Backlighting ............................... 19
2.3. EdgeDetection.................................. 20
2.3.1. EdgeModels ............................... 20
2.3.2. DerivativeBasedEdgeDetection.................... 21
2.3.3. CommonEdgeDetectors ........................ 23
2.3.4. SubpixelEdgeDetection......................... 27
2.4. TemplateMatching................................ 29
3. Hardware Configuration 31
3.1. Conveyor ..................................... 31
3.2. Camerasetup................................... 33
3.2.1. CameraSelection............................. 33
3.2.2. CameraPositioning ........................... 38
3.2.3. LensSelection .............................. 38
3.3. Illumination.................................... 43
3.4. BlowOutMechanism .............................. 48
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