Cognex Corporation · NASDAQ:CGNX

Cognex — Technical Presentation (February 2018)

49 slides from Cognex's technical presentation, February 2018

  1. Slide 1: Introduction to Machine Vision

    INTRODUCTION TO MACHINE VISION Thibaut van Baer | February 2018 1 © 2018 Cognex Confidential

  2. Slide 2: Agenda

    Agenda ▪ What is machine vision? ▪ Why use machine vision? ▪ Machine vision applications ▪ Types of machine vision systems ▪ Vision system components ▪ Machine vision terms ▪ Improving vision system performance ▪ Summary ▪ Q&A 2 © 2018 Cognex Confidential

  3. Slide 3: What is machine vision?

    What is machine vision? The camera lens and sensor capture images… Cognex advanced vision tools interpret what’s being seen 3 © 2018 Cognex Confidential

  4. Slide 4: Evolution of machine vision

    Evolution of machine vision 3D Displacement Sensors Vision Sensors Barcode Readers Modular Vision PC Vision Embedded Boards Proprietary Box 1982 Today 4 © 2018 Cognex Confidential

  5. Slide 5: Simple examples

    Simple examples Machine vision systems: 1. Analyze images 2. Makes decisions and returns results about each image Good Oil Filter: All holes are open Bad Oil Filter: Some holes The center tab on this bracket is are blocked 37.255 mm wide 5 © 2018 Cognex Confidential

  6. Slide 6: Image analysis

    Image analysis The primary purpose of machine vision is image analysis Decision Answer Image Location 6 © 2018 Cognex Confidential

  7. Slide 7: Where is machine vision used?

    Where is machine vision used? Automotive Industry Electronics Semiconductor Industry Food Packaging Industry Consumer Medical Products Pharmaceutical Shipping Graphic Arts/ Transportation Packaging 7 © 2018 Cognex Confidential

  8. Slide 8: Why is machine vision used?

    Why is machine vision used? ▪ Automate manufacturing ▪ Overcome inefficient manual processes inspection processes ▪ Improve product quality ▪ Increase manufacturing throughput ▪ Protect brand image ▪ Reduce material waste ▪ Reduce operational costs ▪ Minimize the risk of recalls 8 © 2018 Cognex Conf

  9. Slide 9: Critical for achieving strategic goals

    Critical for achieving strategic goals ▪ High speed production lines ▪ Clean room environments ▪ Hazardous environments ▪ Microscopic inspection ▪ Closed-loop process control ▪ Robot guidance ▪ Precise non-contact measurement 9 © 2018 Cognex Confidential

  10. Slide 10: Benefits of machine vision

    Benefits of machine vision Manufacturing Goal Machine Vision Applications Improved product quality Inspection, measurement, gauging, and assembly verification Increased productivity Repetitive tasks done manually are automated with machine vision Production flexibility and Automatic product changeov

  11. Slide 11: Machine Vision Applications

    MACHINE VISION APPLICATIONS 11 © 2018 Cognex Confidential

  12. Slide 12: What does machine vision do?

    What does machine vision do? GUIDE INSPECT GAUGE IDENTIFY 12 © 2016 2018 Cognex Confidential

  13. Slide 13: Guidance

    Guidance Determines part position (x, y, and angle) Automates handling of parts for machines: ▪ Alignment & Placement ▪ 2D & 3D Picking ▪ Eliminates need for fixturing & improves robot flexibility Vision tool alignment, fixturing ▪ Locate at least one feature on a part for the purpose of calculating

  14. Slide 14: Geometric pattern matching

    Geometric pattern matching Trained Image Confusing Background Out of focus Rotation and Scale Changes Occlusions Uneven Lighting 14 © 2018 Cognex Confidential

  15. Slide 15: Part location challenges

    Part location challenges Appearance Changes 15 © 2018 Cognex Confidential

  16. Slide 16: Part location challenges

    Part location challenges Variation in part appearance 16 © 2018 Cognex Confidential 1

  17. Slide 17: Inspection

    Inspection Correct location ▪ Orientation ▪ Skew Quality ▪ Defect Detection ▪ Surface Inspection ▪ Contaminants Completeness ▪ Fill Level ▪ Feature Presence ▪ Counting ▪ Assembly Verification 17 © 2018 Cognex Confidential

  18. Slide 18: Gauging

    Gauging Precise dimensioning ▪ Automated metrology and data recording Ensures tolerances ▪ Diameters ▪ Gaps ▪ Bushings ▪ Threads, etc. 18 © 2018 Cognex Confidential

  19. Slide 19: Identification

    Identification Read Codes ▪ Printed 1-D Barcodes & 2-D Matrix ▪ Direct Part Mark Read Characters ▪ OCR / OCV Recognize Objects ▪ Based on color, shape, or size 19 © 2018 Cognex Confidential

  20. Slide 20: Machine Vision Principle

    MACHINE VISION PRINCIPLE 20 © 2018 Cognex Confidential

  21. Slide 21: 1D machine vision

    1D machine vision ▪ 100% continuous web inspection and classification ▪ Uses line-scan cameras ▪ Materials inspected include: Metals, non-wovens Plastics, Paper 21 © 2018 Cognex Confidential

  22. Slide 22: Four reasons to use line scan

    Four reasons to use line scan 1. Unwrap cylindrical objects for inspection 2. Add vision to space-constrained environments 3. Meet high-resolution inspection requirements 4. Inspect objects in continuous motion 22 © 2018 Cognex Confidential

  23. Slide 23: 2D machine vision – area scan

    2D machine vision – area scan 23 © 2018 Cognex Confidential

  24. Slide 24: 3D Machine Vision

    3D Machine Vision 24 © 2018 Cognex Confidential

  25. Slide 25: Profiler principle of operation

    Profiler principle of operation 25 © 2018 Cognex Confidential

  26. Slide 26: Displacement sensor

    Displacement sensor 26 © 2018 Cognex Confidential

  27. Slide 27: Vision Systems and Sensors

    VISION SYSTEMS AND SENSORS 27 © 2018 Cognex Confidential

  28. Slide 28: Cognex Vision Sensor

    COGNEX VISION SENSOR Powerful, proven In-Sight® vision tools for reliable inspection performance Field changeable, high power, diffuse illumination Field changeable lenses and filters for optimal image quality Compact, modular body design fits into tight spaces Step-by-step setup with EasyBuilder® 2

  29. Slide 29: Cognex 2D Vision

    Cognex 2D Vision ▪ Industry-leading image acquisition and optical character recognition ▪ Powerful and precise pattern matching algorithms ▪ Most reliable and flexible inspection systems 29 © 2018 Cognex Confidential

  30. Slide 30: Cognex 3D Vision

    Cognex 3D Vision ▪ 3D laser displacement sensors provide three dimensional inspection of products to optimize quality ▪ Measure height, volume or tilt with cross section and plane fitting tools – regardless of contrast or light variations ▪ Expanded range of 3D sensors, factory calibrated to deliver

  31. Slide 31: System Components

    SYSTEM COMPONENTS 31 © 2018 Cognex Confidential

  32. Slide 32: Key parts of a vision system

    Key parts of a vision system Light Source Communication I/O Comm. INPUT INPUT O UTPUT SLC50/4CPU RUN FORC 0 4 0 4 0 4 POWER FLT DH+ 1 5 1 5 1 5 BAT RS232 2 6 2 6 2 6 RUN REM PROG 3 7 3 7 3 7 Lens Camera Vision Software A -B ALLEN -BRADLEY Vision System Inputs/Outputs: switches, PLCs, robots, lights

  33. Slide 33: Putting it all together

    Putting it all together Parts Light Source Lens Camera Input: Monitor Output: •Serial •Serial •Parallel •Parallel •ISA, PCI, VME busa •ISA, PCI, VME bus Vision System Operator Pointing Device (Trackball, Mouse, Touchscreen) 33 © 2018 Cognex Confidential

  34. Slide 34: How the system works

    How the system works 1. Part arrives at inspection station 2. Sensor detects part and sends a trigger to the vision system 3. Strobe is flashed to illuminate part 4. Vision System acquires the image from the sensor. 5. Software algorithms running on vision system FAIL performs image processing and/o

  35. Slide 35: Machine vision algorithms

    Machine vision algorithms Algorithms used by Vision Tools transform raw numbers into useful higher level features … - Raw numbers turned into edges, colors, characters, and other characteristics … then makes decisions - Returns answers such as position, similarity, distance, presence, quality All wi

  36. Slide 36: Terminology

    TERMINOLOGY 37 © 2018 Cognex Confidential

  37. Slide 37: Vision definitions

    Vision definitions Field of View (FOV) ▪ The part which can be seen by the machine vision system at one moment. ▪ The field of view depends on the lens of the system and the working distance between object and camera. 5” x 7” 38 © 2018 Cognex Confidential

  38. Slide 38: Field of view

    Field of view What is my field of view? 3” 4” 8” 15” 39 © 2018 Cognex Confidential

  39. Slide 39: Working distance and resolution

    Working distance and resolution Working Distance (WD) ▪ Distance between the FRONT of the lens and the target 10” Resolution ▪ The minimum feature size of the object under inspection. 40 © 2018 Cognex Confidential

  40. Slide 40: Correlation working distance/FOV

    Correlation working distance/FOV  41 © 2018 Cognex Confidential

  41. Slide 41: Depth of field

    Depth of field Depth of Field (DOF) ▪ The distance in front of and behind the object which appears to be in focus 3” More DOF with a small aperture (high f/number) than with a large aperture (low f/number) 42 © 2018 Cognex Confidential

  42. Slide 42: System Components

    SYSTEM COMPONENTS 43 © 2018 Cognex Confidential

  43. Slide 43: Different lens … same image?

    Different lens … same image? ▪ Lighting ▪ Depth of field ▪ Working distance ▪ Line speed ▪ Exposure time ▪ Aperture ▪ Budget 44 © 2018 Cognex Confidential

  44. Slide 44: Lighting techniques

    Lighting techniques Light can be structured in different ways. Angle and direction of the light determine how the mark and space is seen by the camera. Back Lighting Axial Diffuse Structured Dark Field Bright Field Diffuse Dome 45 © 2018 Cognex Confidential 4

  45. Slide 45: Optics

    Optics To learn more about choosing the right optics go to Cognex.com > Resources > On-Demand Webinars 46 © 2018 Cognex Confidential

  46. Slide 46: Filtering techniques

    Filtering techniques ▪ Control quality and quantity of light ▪ Block all unwanted ambient lighting ▪ Pass only the output of lighting used for inspection ▪ Increase contrast and resolution For more on optical filters, go to Cognex.com > Resources > On-Demand Webinars 47 © 2018 Cognex Confidential

  47. Slide 47: Image pre-processing tools

    Image pre-processing tools To learn more about image pre-processing, go to Cognex.com > Resources > On-Demand Webinars 48 © 2018 Cognex Confidential

  48. Slide 48: Summary

    Summary ▪ Make products better, faster, and less expensively ▪ Gauging, Inspection, Guidance, and Identification are the key applications ▪ Key components are the lens, camera, lighting, vision software and communications ▪ Learn more about optics, lighting, filters and image pre- processing to impr

  49. Slide 49: Questions?

    QUESTIONS? Contact.eu@Cognex.com | www.Cognex.com 50 © 2018 Cognex Confidential

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