truly automated light and color measurement for … · see the difference 2 truly automated light...
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1 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
TRULY AUTOMATED LIGHT AND COLOR MEASUREMENT FOR TELL-TALES AND INDICATORS
Presented by Shannon Roberts
November 30, 2016
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2 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
TODAY’S SPEAKER
Shannon Roberts Product Manager, Radiant Vision Systems Shannon Roberts is a Product Manager at Radiant Vision Systems. Having begun her career at Radiant in the role of Applications Engineer, and later Applications Engineering Lead, Shannon has a thorough knowledge of light and color measurement as applied through the use of imaging colorimeters and sophisticated software tools that simplify customer projects. Her understanding of light and color theory has guided customers in defining technical parameters for display and illuminated component inspection in automotive industries and beyond. Shannon received a B.A. in Physics from the University of Colorado, Boulder, and has a passion for improving science education and solving challenging technical problems.
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3 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
AGENDA
• About Radiant • Measuring Tell-Tales and Indicators • The Trouble with Current Methods • The Solution: Auto-POI • Setting Up Automatic Points of Interest • Addressing Challenges in Manufacturing • Software Demonstration • Summary • Q&A
TODAY’S AGENDA
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4 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
• Designs, manufactures, and sells camera-based solutions that simplify sophisticated light and color measurements for R&D and production
• Has thousands of imaging colorimeters and photometers testing millions of displays and illuminated components in production settings
• Headquartered in Redmond, WA, USA, with offices in Shanghai, Shenzhen, and Seoul
• Acquired by Konica Minolta in August 2015
ABOUT RADIANT VISION SYSTEMS
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5 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
TRULY AUTOMATED LIGHT AND COLOR MEASUREMENT • Automated Visual Inspection (AVI)
systems are used to measure visual quality of devices quickly and accurately
• AVI of light and color incorporates an imaging colorimeter and sophisticated software calibrated to human perception
• This presentation outlines new developments in imaging software that assist instrument cluster manufacturers in the successful integration of AVI for their test and measurement
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6 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
MEASURING TELL-TALES AND INDICATORS
Requirements and Challenges
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7 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
MEASURING TELL-TALES AND INDICATORS • Image of dash with indicators and tell-tales (set
the scene) – possible add a failed value
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8 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
POINTS OF INTEREST STANDARDS • Points of Interest (POIs) can
provide average luminance and color values within a region, report out values, and have pass/fail associated for production-level control.
• Automotive displays include unique arrangements of indicators and tell-tales, and therefore an adaptable method is needed for quality control in real time.
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9 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
CALCULATING AVERAGE LUMINANCE OF A CHARACTER • The average luminance of an illuminated indicator can be found using a
large POI to encompass the entire character.
• Then, employ a threshold to exclude non-illuminated areas.
Average Luminance (No Threshold): 26.6 cd/m^2
No Luminance Threshold:
Average Luminance (10% Threshold): 114.7 cd/m^2
Luminance Threshold:
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10 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE TROUBLE WITH CURRENT METHODS: MANUAL POI • Manually draw POI around
each symbol to be measured.
• Time-consuming, especially for complex, multi-symbol displays where symbol position and size may vary.
• Green rectangles indicate POI boundaries in image.
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11 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE TROUBLE WITH CURRENT METHODS: MANUAL POI • Manually draw POI around
each symbol to be measured.
• Time-consuming, especially for complex, multi-symbol displays where symbol position and size may vary.
• Green rectangles indicate POI boundaries in image.
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12 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE SOLUTION: AUTO-POI
• New software feature for Radiant ProMetric® or TrueTest™.
• Draw one area across entire display.
• Software automatically traces POI around symbols and enables measurement of precise values for symbols and across symbol sets.
• Green outlines indicate software has located POI (blob) automatically.
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13 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE SOLUTION: AUTO-POI
• New software feature for Radiant ProMetric® or TrueTest™.
• Draw one area across entire display.
• Software automatically traces POI around symbols and enables measurement of precise values for symbols and across symbol sets.
• Green outlines indicate software has located POI (blob) automatically.
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14 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE SOLUTION: AUTO-POI
• New software feature for Radiant ProMetric® or TrueTest™.
• Draw one area across entire display.
• Software automatically traces POI around symbols and enables measurement of precise values for symbols and across symbol sets.
• Green outlines indicate software has located POI (blob) automatically.
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15 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE SOLUTION: AUTO-POI
• New software feature for Radiant ProMetric® or TrueTest™.
• Draw one area across entire display.
• Software automatically traces POI around symbols and enables measurement of precise values for symbols and across symbol sets.
• Green outlines indicate software has located POI (blob) automatically.
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16 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE TROUBLE WITH CURRENT METHODS: STATIC POI • Static POI are areas drawn in
specific locations relative to the camera Field of View (FOV).
• Green rectangles indicate static POI boundaries in image.
• If alignment is not perfect , the static POIs will not capture the character or symbol correctly.
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17 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE SOLUTION: AUTO-POI • Using Auto-POI, automatic POIs
adjust to any device location in the Field of View of the imager.
• POIs are created for each image, so perfect alignment is not required.
• Green outlines indicate software has located POI (blob) automatically.
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18 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE TROUBLE WITH CURRENT METHODS: MULTI-SYMBOL SETS
• Symbols not adjacent to each other must have uniform light and color across a display.
• Separate regions of interest must be drawn around each symbol to acquire measurement data.
• Measurements must be correlated to determine average luminance/ color and uniformity of set (time consuming).
Draw static POI for each symbol and correlate measurements for each symbol set.
All red symbols.
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19 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
All yellow symbols.
THE TROUBLE WITH CURRENT METHODS: MULTI-SYMBOL SETS
• Symbols not adjacent to each other must have uniform light and color across a display.
• Separate regions of interest must be drawn around each symbol to acquire measurement data.
• Measurements must be correlated to determine average luminance/ color and uniformity of set (time consuming).
Draw static POI for each symbol and correlate measurements for each symbol set.
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20 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
All symbols at once.
THE TROUBLE WITH CURRENT METHODS: MULTI-SYMBOL SETS
• Symbols not adjacent to each other must have uniform light and color across a display.
• Separate regions of interest must be drawn around each symbol to acquire measurement data.
• Measurements must be correlated to determine average luminance/ color and uniformity of set (time consuming).
Draw static POI for each symbol and correlate measurements for each symbol set.
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21 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THE SOLUTION: AUTO-POI
• Using Auto-POI, a single creation region captures all symbols of a given set.
• Software uses programed luminance and color thresholds to automatically find and measure related symbols.
Single creation region drawn for entire display with automatic POI drawn for symbols based on target color value.
All red symbols.
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22 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
All yellow symbols.
THE SOLUTION: AUTO-POI
• Using Auto-POI, a single creation region captures all symbols of a given set.
• Software uses programed luminance and color thresholds to automatically find and measure related symbols.
Single creation region drawn for entire display with automatic POI drawn for symbols based on target color value.
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23 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
All symbols at once.
THE SOLUTION: AUTO-POI
• Using Auto-POI, a single creation region captures all symbols of a given set.
• Software uses programed luminance and color thresholds to automatically find and measure related symbols.
Single creation region drawn for entire display with automatic POI drawn for symbols based on target color value.
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24 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
SETTING UP AUTOMATIC POINTS OF INTEREST
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25 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
SETTING UP AUTOMATIC POINTS OF INTEREST • Step 0: Take Measurement of Representative Device • Step 1: Define Creation Region • Step 2: Set Creation Thresholding Criteria
(Luminance and Color) • Step 3: Set Pass/Fail Values for POIs to Be Created • Step 4: Measure Luminance and Color
(POI Are Automatically Drawn) • Step 5: Report Results
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26 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
STEP 0: MEASURE DEVICE
• Capture image of representative device/display using imaging colorimeter • An imaging colorimeter captures a
wide area to enable measurement across multiple illuminated characters at once
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27 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
STEP 1: DEFINE CREATION REGION
Creation Region:
• Rectangle, circle, oval, or polygon
• Defined areas in the FOV of imaging colorimeter
• Used as regions to automatically create POIs and assign pass/fail values
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28 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
User-input thresholds
Search the Creation Region
Pixels above min
threshold
Finds contiguous
pixels
Grouped pixels ! POI
STEP 2: SET CREATION THRESHOLDING CRITERIA
Global Threshold of 30% applied. Only brighter characters found.
.
. Finds
contiguous pixels
Software adapts to variation
Locally adjusts
threshold
Grouped pixels ! POI
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29 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
User-input thresholds
Search the Creation Region
Pixels above min
threshold
Finds contiguous
pixels
Grouped pixels ! POI
STEP 2: SET CREATION THRESHOLDING CRITERIA
Global Threshold of 30% applied. Only brighter characters found.
Global Threshold of 5% applied. Dimmer characters are found, but POI around brighter symbols too large.
.
. Finds
contiguous pixels
Software adapts to variation
Locally adjusts
threshold
Grouped pixels ! POI
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30 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
User-input thresholds
Search the Creation Region
Pixels above min
threshold
Finds contiguous
pixels
Grouped pixels ! POI
STEP 2: SET CREATION THRESHOLDING CRITERIA
Global Threshold of 30% applied. Only brighter characters found.
Global Threshold of 5% applied. Dimmer characters are found, but POI around brighter symbols too large.
Local Thresholding used. All symbols correctly identified.
.
. Finds
contiguous pixels
Software adapts to variation
Locally adjusts
threshold
Grouped pixels ! POI
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31 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
GLOBAL THRESHOLD: COLOR
• The user can specify a minimum and maximum CIE x, y (or u’,v’) that the pixel must be between. Only pixels that meet the luminance and color criteria are included in the POI set.
• Useful when two icons of
similar luminance values, but different colors, are overlapping in the FOV
To create a POI for just the needle, an Auto-POI has been created thresholded to red in the CIE chart
Red needle intersects white “0”.
Luminance only threshold connects characters together in one POI
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32 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
STEP 3: SET PASS/FAIL VALUES
• Typical pass/fail types • Luminance • Color • CCT • STD Dev, Min/Max • Dominant Wavelength • Purity • Min/Max in Region
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33 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
PASS/FAIL VALUES: COLOR REGION • Define color region pass/fail criteria
beyond simple minimums and maximum of CIE x,y or CIE u’v’.
• Tier 1 and Tier 2 suppliers define
regions for any color across a wide variety of instrument clusters and manufacturers.
• Region Types: • Rectangle • Ellipse • Polygon
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34 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
PASS/FAIL VALUES: COLOR REGION • To specify pass/fail values based on
user perceptions of noticeable differences in color, a pass/fail color region in the shape of an ellipse can be used. MacAdam ellipses is one example.
MacAdam ellipses enlarged by a factor of 10 [2]
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35 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
STEP 4: MEASURE LIGHT/COLOR
• Run the same inspection against new devices and indicator sets.
• Saved parameters are applied to appropriate areas, colors, or symbol sets of new display.
• Can be used to inspect different displays for luminance and color consistency during production-level quality control.
• Same inspection criteria can be applied to single product or across line changes.
Set #1
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36 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
STEP 4: MEASURE LIGHT/COLOR
• Run the same inspection against new devices and indicator sets.
• Saved parameters are applied to appropriate areas, colors, or symbol sets of new display.
• Can be used to inspect different displays for luminance and color consistency during production-level quality control.
• Same inspection criteria can be applied to single product or across line changes.
Set #1 Set #2
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37 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
STEP 5: REPORT RESULTS
• Results recorded in software for off-line measurement or in-line pass/fail QA.
• Depending on software package, measurement results can be saved via: • Table of values for each POI.
• Export results report and save.
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38 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
ADDRESSING CHALLENGES IN MANUFACTURING
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39 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
CHALLENGES IN MANUFACTURING Problem Solution Measure luminance of multiple points quickly, impossible with spot meter
Imaging Colorimeter and software
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40 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
MEASURE LUMINANCE OF MULTIPLE POINTS
QUICKLY, IMPOSSIBLE WITH SPOT METER
Spot meter takes single-spot measurements at defined points.
Auto-POI measures entire symbol at once.
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41 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
Problem Solution Measure luminance of multiple points quickly, impossible with spot meter
Imaging Colorimeter and software
Measure absolute luminance and color Imaging Colorimeter and software
CHALLENGES IN MANUFACTURING
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42 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
MEASURE ABSOLUTE LUMINANCE AND COLOR
Auto-POI applies the same programmed luminance and CIE color tolerances to all displays and devices that are measured.
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43 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
Problem Solution Measure luminance of multiple points quickly, impossible with spot meter
Imaging Colorimeter and software
Measure absolute luminance and color Imaging Colorimeter and software
Fixture tolerances not tight enough to ensure perfect alignment to camera
Adaptable, automatic software solution to find characters in any location
CHALLENGES IN MANUFACTURING
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44 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
FIXTURE TOLERANCES NOT TIGHT ENOUGH TO ENSURE PERFECT ALIGNMENT TO CAMERA
Auto-POI automatically adjusts to new symbol positions.
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45 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
Problem Solution Measure luminance of multiple points quickly, impossible with spot meter
Imaging Colorimeter and software
Measure absolute luminance and color Imaging Colorimeter and software
Fixture tolerances not tight enough to ensure perfect alignment to camera
Adaptable, automatic software solution to find characters in any location
Many configurations of displays and instrument clusters; lines change quickly
Adaptable software with pre-set creation regions to find indicators in any location
CHALLENGES IN MANUFACTURING
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46 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
MANY CONFIGURATIONS OF DISPLAYS AND INSTRUMENT CLUSTERS; LINES CHANGE QUICKLY
Auto-POI automatically adapts to new symbols within same luminance/color tolerance.
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47 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
Problem Solution Measure luminance of multiple points quickly, impossible with spot meter
Imaging Colorimeter and software
Measure absolute luminance and color Imaging Colorimeter and software
Fixture tolerances not tight enough to ensure perfect alignment to camera
Adaptable, automatic software solution to find characters in any location
Many configurations of displays and instrument clusters; lines change quickly
Adaptable software with pre-set creation regions to find indicators in any location
Need different pass/fail criteria for different color LEDs
Creation regions with Color Thresholding, to create POI and set specific pass/fail for each color LED
CHALLENGES IN MANUFACTURING
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48 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
NEED DIFFERENT PASS/FAIL CRITERIA FOR DIFFERENT COLOR LEDS
Auto-POI Color Thresholding detects symbols of the same color and applies unique pass/fail parameters
to all symbols of that color.
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49 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
SUMMARY
• Auto-POI measures illuminated tell-tales and indicators with imaging colorimeters at increased speed and accuracy of measurement over previous methods.
• Employs auto-finding techniques, eliminating the need to ensure perfect alignment between imaging colorimeter and sample, or multiple tests for multiple points of interest in a single panel.
• Indicators measured for various pass/fail criterial including user-defined color regions. • Both production and R&D applications can benefit from Auto-POI.
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50 S E E T H E D I F F E R E N C E © 2016 Radiant Vision Systems, LLC. All Rights Reserved. Truly Automated Light and Color Measurement for Tell-Tales and Indicators
THANK YOU! Questions? [email protected]