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INTRODUCTION TO MACHINE VISION

TOOLS AND METHODOLOGIES

Shweta Kapdoskar

Product Marketing Manager, Machine Vision

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AGENDA

What is machine vision?

What is image analysis?

Principal image analysis tools

Summary of key points

Q&A

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WHAT IS MACHINE VISION?

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A SIMPLE CONCEPT

Formal definition:

Machine vision is the use of devices for optical non-contact sensing to automatically receive and interpret an image of a real scene in order to obtain information and/or control machines or processes.

- from the Society of Manufacturing Engineers

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MACHINE VISION SYSTEM

5

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IMAGE ANALYSIS

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IMAGE ANALYSIS TOOLS

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Trained Part

Out of focus

180° Rotation

Reversed Polarity Occlusion

Scale Change

Dim Lighting

Confusing Background

PATTERN SEARCH TOOL

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WHAT TO LOOK FOR IN PATTERN

MATCHING TECHNOLOGY?

Pattern-based search technology more closely resembles the way humans discern between similar things and recognize familiar ones.

Consider the examples of remembering the faces of people.

Even if the faces change due to lighting, extra features, and less features, you will still likely recognize them if there is enough of the original detail intact.

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PATTERN MATCHING

CHALLENGES

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OVERCOMING INSPECTION

OBSTACLES

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Have you used machine vision analysis tools before?

a. Yes

b. No

POLL QUESTION #1

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EDGE DETECTION

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INSPECTEDGE

Detect short shots on caps

Chips in outer boundary

Deformations on the outer circumference of a bottle Or even to Find the minimum width and maximum width in a PET bottle

Bead Inspection

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ADVANCED EDGE INSPECTION

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CALIPER TOOLS

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CALIPER APPLICATIONS

Ideal for gauging applications

Measure the width of a part

Measure the distance between parts

Useful when fixturing a part

When a part has positional uncertainty

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BLOB DETECTION

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BLOB TOOL

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Which of the following best describes your industry?

a. Food and Beverage

b. Automotive

c. Consumer

d. Electronics

e. Other

POLL QUESTION #2

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OPTICAL CHARACTER

RECOGNITION /VERIFICATION

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OCRMAX AUTOTUNE

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BARCODE READING

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HISTOGRAM

Histogram is a graphical representation of statistics and grey values found within a specified area of the image.

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COLOR ANALYSIS

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COLOR VERIFICATION

Is this the correct color?

Color Monitoring/Uniformity of color (Color ID)

Single color detection

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COLOR QUANTITY

How much of each color is found?

Color Makeup Inspection – Quantify the distribution of color(s) across the part

Extract specific

color sets

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COLOR TOOLS

Match Color – Measure Color

Average color found in region

Returns RGB and HSI value

Match score to trained color

24 bit color resolution

Color Sorting, Color Monitoring, Color ID, Single Color Verification

Extract Color – Measure Amount of Color(s)

Extracts specific colors for inspection

Outputs pixel counts, match scores & filtered images

16 bit color resolution

Color Filters, Color Blobs, Pixel Counting, Color Complexity, Color Verification

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SUMMARY

• Machine Vision : enables better, faster and less expensive manufacturing.

• Image Analysis Methodologies and Tools : Pattern Matching, Edge Detection, OCR, BarCode Reading, Blob Analysis and Color Tools

Don't go for it alone...get help from experts!

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THANK YOU FOR YOUR TIME