cosmetic gloss measurement vert3

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1 04/02/2008 In Vivo Quantitative Evaluation of Gloss 藥藥 藥 . 藥藥 真真真真 -- 真真真真 真真真真真真真 DIY 真真真真真

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Page 1: Cosmetic Gloss Measurement VerT3

1 04/02/2008

In Vivo Quantitative Evaluation of Gloss

藥妝 真 .晶砂

真異典藏--芳香療法、手工皂與化妝品DIY的研究世界

Page 2: Cosmetic Gloss Measurement VerT3

2 04/02/2008

Abstract

Key words – gloss, shine, skin, hair, light, scattering, polarization, imaging

Differentiates components of scattered light

Use real time polarization analysis technique

Enables in vivo quantitative evaluation of gloss from hair & skin

Quality control & claims substantiation

Page 3: Cosmetic Gloss Measurement VerT3

3 04/02/2008

Introduction

Cosmetic manufacturers need..

Quantify visual appearance of products

Improve performance, quality & reproducibility

Substantiate claims

Accurately to study skin and hair

In vivo non-contact testing provides the most meaningful results.

Page 4: Cosmetic Gloss Measurement VerT3

4 04/02/2008

Color and GlossScattered light can be divided into three categories…

Mirror-like reflected

light (specular reflection)

( 鏡像反射光或鏡像反射 )

Volume scattering(體積散射)

Surface scatteritng(表面散射)

Page 5: Cosmetic Gloss Measurement VerT3

5 04/02/2008

Degrees of Gloss

Definition Ranging

Gd

specular light

/

total reflected light (%)

0% (low gloss)

~

100%

(high gloss)

Gd*

specular light

:volume-scattered li

ght

0 (low gloss)

~

∞ (high gloss)

Page 6: Cosmetic Gloss Measurement VerT3

6 04/02/2008

Operating Principle

Light scattered exhibits various polarization signatures

Based on differentiating and measuring the types of scattering events.

Using a polarimetric camera with a high polarization contrast parameter value at a fast video rate

Measure specular light, surface-scattered light, and volume-scattered light

Processed and combined to provide accurate and consistent gloss values Gd and Gd*

Page 7: Cosmetic Gloss Measurement VerT3

7 04/02/2008

Experimentation

PolarimetricCamera

PolarizedIllumination

Image acquisition & processing

Page 8: Cosmetic Gloss Measurement VerT3

8 04/02/2008

Result

In vivo gloss measurement of foundations

05

101520253035404550

Gd Matte1 Matte3 Matte5 Bareskin

Glossy2

Foundations

Page 9: Cosmetic Gloss Measurement VerT3

9 04/02/2008

Uncombed

Combed

Referenceconditioner

ShineImprove

conditioner

ShineImproved

conditioner+ polish

0

1

2

3

4

5

6

7

8

Gd*

Result

Efficiency testing of hair product

Page 10: Cosmetic Gloss Measurement VerT3

10 04/02/2008

Result

Gloss distribution

Page 11: Cosmetic Gloss Measurement VerT3

11 04/02/2008

Advantages to Gloss Measurement

New Technique

Independent of texture and shape

Correlated to human eye assessment

High accuracy & High consistency

Limitation is repositioning of the object.

Page 12: Cosmetic Gloss Measurement VerT3

12 04/02/2008

Conclusion

The described imaging technique opens…

• Possibility of measuring objectively the gloss of textured, complex 3D objects.

• Well adapted for the cosmetic industry to formulate, evaluate products and substantiate claims.

Page 13: Cosmetic Gloss Measurement VerT3

13 04/02/2008

References

• 1. S Breugnot, L Le Hors, D Dolfi and P Hartemann, Phenomenological• ModelofPaintsforMultispectralPolarimetricImaging, Orlando: Aerosense• (2001)• 2. HC Van De Hulst, Light Scattering by Small Particles, New York: Dover• (1981)• 3. The Munsell Book of Color, Baltimore, MD: Munsell Color Company• (1976)• 4. E Collett, Polarized Light, New York: M Dekker, Inc (1993)• 5. M Rowe, EN Pugh Jr, JS Tyo and N Engheta, Polarization difference• imaging: A biologically inspired technique for observation through• scattering media, Optics Letters 20(6), 608-610 (Mar 15, 1995)• 6. S Breugnot and P Cl menceau, Modeling of a polarization active imager• at y-806 nm, Optical Engineering 39(10) 2677-2680 (Oct 2000)• 7. R McMullen, J Jachowicz, Optical properties of hair: Effect of treatments• on luster as quantified byimage analysis, J CosmetSci54 335-351 (July/• Aug 2003)• 8. R Korichi, Video imaging in the measurement of makeup • efficacy and performance, Cosmet Toil 117(10) 39-48 (2002)