Visual Perception and appearance scales · 20 Novembre, 2010 Visual Perception and appearance...
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Transcript of Visual Perception and appearance scales · 20 Novembre, 2010 Visual Perception and appearance...
20 Novembre, 2010
Visual Perception and appearance scales
What is the correlation?
Dr. Barbara Marchetti
CRF-GML- Surface Treatments – Paint
Ing. Roberta Pecoraro
FGA – Manufacturing Engineering Paint
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
AGENDA
2
16th April 2013
Aesthetic concept and Quality
Appearance measurement at FGA
Goals
Team working
Appearance survey
Scales Analysis
Results
FGA scale criterias
Conclusions and next steps
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck 3
Aesthetic concept and Quality
Aw
are
ness
Image
low
hig
h
weak strong
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Appearance measurement at FGA
4
Official instrument: Wave Scan Dual By applying mathematical filter functions the structure spectrum is
obtained.
Dullness (du): Structures <0.1 mm
Wa: Structures from 0.1-0.3 mm
Wb: Structures from 0.3-1 mm
Wc: Structures from 1-3 mm
Wd: Structures from 3-10 mm
We: Structures from 10-30 mm
All vehicles are measured according to specific control plan
FGA scale: LW (structures from 1.2 – 12 mm)
CG scale: R (80% of correlation is based on LW)
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Goals
5
Reduce target value
Looking for a mathematical model more
representative of the human eye perception
The issue we met was, according to the limits,
measured values
DO NOT REFLECT
the visual perception
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Team working
6
with collaboration of
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Appearance survey
7
• Fiat Paint Appearance survey
15 models
Ranking based on 5 high runner colors (solid white, red and black,
metallic black and silver)
3 vehicles / model / color
21 readings / vehicle
• European Benchmark Appearance survey
196 models
Ranking based on 5 high runner colors (solid white, red and black,
metallic black and silver)
3 vehicles / model / color
21 readings / vehicle
Based on du, Wa… We wavelenght
66.465 measurements analyzed
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Scales analysis
8
Based on the ideal curves propose by Byk-Gardner
Rating
Balance / W d
LW / SW
Balance / W L
LC / W L
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck 9
Scales analysis
Rating
Balance / W d
LW / SW
Balance / W L
LC / W L
LW / SW
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck 10
Scales analysis
Rating
Balance / W d
LW / SW
Balance / W L
LC / W L
Rating
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck 11
Scales analysis
Rating
Balance / W d
LW / SW
Balance / W L
LC / W L
Rating LW= 9.5
SW= 32.3
LW= 9.9
SW= 18.3
R= 7.0
R= 7.0
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck 12
Scales analysis
Rating
Balance / W d
LW / SW
Balance / W L
LC / W L
Balance / W d
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck 13
Scales analysis
Rating
Balance / W d
LW / SW
Balance / W L
LC / W L
Balance / W L
WcWd
WcWdWL
*100
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck 14
Scales analysis
Rating
Balance / W d
LW / SW
Balance / W L
LC / W L LC / W L
WdWb
WdWbLC
*100
WcWd
WcWdWL
*100
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Results Correlation between ideal curves and human eyes perception
15
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Results Correlation between ideal curves and human eyes perception
16
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Results
17
OK curves and NOK curves in overlapping
Positive visual judgment for OK curves and NOK curves
No corrispondence between scales results and visual judgments
Study of a new mathematical model closer to the visual
perception
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
FGA scale criterias
18
1. Establish two peaks in Wb and Wd
2. Establish maximum peak between Wb and Wd
3. Establish the level in the scale basis to Wa and Wd
4. Fix Wbmin and Wbmax
1
Wa Wb Wc Wd We Wa Wb Wc Wd We
10th BYK-Gardner User Meeting 16th /17th April 2013 in Innsbruck
Conclusions and next steps
19
Final optimization of the model
Appearance survey in the European and North American
market to to validate the model
Introduce new appearance specification
Standardize FGA and CG processes