Document Outline

• IMAQ Vision for Visual Basic User Manual
• Support
  • Worldwide Technical Support and Product Information
  • National Instruments Corporate Headquarters
  • Worldwide Offices
• Important Information
  • Warranty
  • Copyright
  • Trademarks
  • WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS
• Contents
• About This Manual
  • Conventions
  • Related Documentation
    • IMAQ Vision
    • NI Vision Assistant
    • NI Vision Builder for Automated Inspection
    • Other Documentation
• Chapter 1 Introduction to IMAQ Vision
  • About IMAQ Vision
  • Documentation and Examples
  • IMAQ Vision for Visual Basic Organization
    • cwimaq.ocx
      • CWIMAQ Control
      • CWIMAQVision Control
      • CWIMAQViewer Control
    • niocr.ocx
      • NIOCR control
    • cwmv.ocx
      • CWMachineVision control
    • ActiveX Objects
  • Creating IMAQ Vision Applications
    • Figure 1-1. General Steps for Designing a Vision Application
    • Figure 1-2. Inspection Steps for Building a Vision Application
• Chapter 2 Getting Measurement-Ready Images
  • Set Up Your Imaging System
  • Calibrate Your Imaging System
  • Create an Image
  • Acquire or Read an Image
    • Acquiring an Image
      • One-Shot Acquisition
      • Continuous Acquisition
    • Reading a File
    • Converting an Array to an Image
  • Display an Image
  • Attach Calibration Information
  • Analyze an Image
  • Improve an Image
    • Lookup Tables
    • Filters
      • Convolution Filter
      • Nth Order Filter
    • Grayscale Morphology
    • FFT
      • Complex Image Operations
• Chapter 3 Making Grayscale and Color Measurements
  • Figure 3-1. Steps to Taking Grayscale and Color Measurements
  • Define Regions of Interest
    • Defining Regions Interactively
      • Table 3-1. Tools Palette Functions
      • Figure 3-2. Tools Information
    • Defining Regions Programmatically
      • Table 3-2. Methods that Add Shapes to Regions
    • Defining Regions with Masks
  • Measure Grayscale Statistics
  • Measure Color Statistics
    • Figure 3-3. Primary Components of an 32-bit Color Image
    • Figure 3-4. Primary Components of a 64-bit Color Image
    • Comparing Colors
    • Learning Color Information
      • Specifying the Color Information to Learn
      • Figure 3-5. Template Color Information
      • Using the Entire Image
      • Figure 3-6. Using the Entire Image to Learn Color Distribution
      • Figure 3-7. Using a Single Region to Learn Color Distribution
      • Figure 3-8. Using Multiple Regions to Learn Color Distribution
      • Choosing a Color Representation Sensitivity
      • Ignoring Learned Colors
• Chapter 4 Performing Particle Analysis
  • Figure 4-1. Steps for Performing Particle Analysis
  • Create a Binary Image
  • Improve the Binary Image
    • Removing Unwanted Particles
    • Separating Touching Particles
    • Improving Particle Shapes
  • Make Particle Measurements
    • Table 4-1. Measurement Types
• Chapter 5 Performing Machine Vision Tasks
  • Figure 5-1. Steps to Performing Machine Vision
  • Locate Objects to Inspect
    • Using Edge Detection to Build a Coordinate Transformation
      • Figure 5-2. Coordinate Systems of a Reference Image and Inspection Image
      • Figure 5-3. Locating Coordinate System Axes with Two Search Areas
    • Using Pattern Matching to Build a Coordinate Transformation
    • Choosing a Method to Build the Coordinate Transformation
      • Figure 5-4. Building a Coordinate Transformation
  • Set Search Areas
    • Defining Regions Interactively
      • Table 5-1. ROI Selection Methods to Use with CWMachineVision Methods
    • Defining Regions Programmatically
  • Find Measurement Points
    • Finding Features Using Edge Detection
      • Finding Lines or Circles
      • Figure 5-5. Finding a Straight Feature
      • Figure 5-6. Finding a Circular Feature
      • Finding Edge Points Along One Search Contour
      • Finding Edge Points Along Multiple Search Contours
    • Finding Points Using Pattern Matching
      • Defining and Creating Effective Template Images
      • Figure 5-7. Symmetry
      • Figure 5-8. Feature Detail
      • Figure 5-9. Positional Information
      • Figure 5-10. Background Information
      • Training the Pattern Matching Algorithm
      • Defining a Search Area
      • Figure 5-11. Selecting a Search Area for Grayscale Pattern Matching
      • Setting Matching Parameters and Tolerances
      • Testing the Search Algorithm on Test Images
      • Using a Ranking Method to Verify Results
    • Finding Points Using Color Pattern Matching
      • Defining and Creating Effective Color Template Images
      • Training the Color Pattern Matching Algorithm
      • Defining a Search Area
      • Figure 5-12. Selecting a Search Area for Color Pattern Matching
      • Setting Matching Parameters and Tolerances
      • Testing the Search Algorithm on Test Images
    • Finding Points Using Color Location
  • Convert Pixel Coordinates to Real-World Coordinates
  • Make Measurements
    • Distance Measurements
    • Analytic Geometry Measurements
    • Instrument Reader Measurements
  • Identify Parts Under Inspection
    • Classifying Samples
    • Reading Characters
    • Reading Barcodes
      • Read 1D Barcodes
      • Read Data Matrix Barcode
      • Read PDF417 Barcode
  • Display Results
• Chapter 6 Calibrating Images
  • Perspective and Nonlinear Distortion Calibration
    • Defining a Calibration Template
      • Figure 6-1. Defining a Calibration Grid
    • Defining a Reference Coordinate System
      • Figure 6-2. Axis Direction in the Image Plane
      • Figure 6-3. A Calibration Grid and an Image of the Grid
      • Figure 6-4. Defining a Coordinate System
    • Learning Calibration Information
      • Specifying Scaling Factors
      • Choosing a Region of Interest
      • Choosing a Learning Algorithm
      • Figure 6-5. Types of Image Distortion
      • Figure 6-6. Calibration ROIs
      • Using the Learning Score
      • Learning the Error Map
      • Learning the Correction Table
      • Setting the Scaling Mode
      • Calibration Invalidation
  • Simple Calibration
    • Figure 6-7. Defining a Simple Calibration
  • Save Calibration Information
  • Attach Calibration Information
• Appendix A Technical Support and Professional Services
• Glossary
  • Numbers
  • A-B
  • C
  • D-E
  • F-G
  • H
  • I
  • J-L
  • M-N
  • O
  • P
  • Q-R
  • S
  • T
  • V
• Index
  • Numerics
  • A-C
  • D
  • E-I
  • K-N
  • O-R
  • S-T
  • U-Z