TRI 2018 : 8th International Applied Hair Science Conference

BOSSA NOVA Technologies will be present at the 8th International Applied Hair Science Conference, organized by TRI Princeton in Red Banks New Jersey, on the 6th and 7th of June. For this occasion, we will be presenting some of our latest projects on the development of new optical analysis system for hair care, along with some of our long-standing partners, TRI Princeton, SPEquation and Procter&Gamble Beauty.

POSTER#1 :

Volumizing, fly-away/frizz control and straightening claims substantiation using 3D volume measurement system

Kiran NOWBUTH, Pascal STERLE (SPEquation)
Robert GEORGE, Sébastien BREUGNOT (BOSSA NOVA Technologies)

Abstract : Flat, limp, lifeless hair is a problem that plagues many women, who desire voluminous, bouncy and healthy-looking hair. The presence of fly-away and frizz makes the hair appears dry and frizzy instead of smooth, straight and defined. Increasing hair body and volume while straightening and taming fly-away and frizz is the goal of many rinse-off conditioners and new hair care products like volumizing gel and styling mousse. The efficiency of these products has to be scientifically evaluated. Volumizing, frizz control and straightening claims are usually substantiated by digital image processing of a single image of a hair swatch positioned over a back light panel. Measurement of the hair swatch bulk area and the fly-away frizz area is then interpolated to volume, frizz control and straightening claims. These claims could benefit from a 360 degrees analysis of the hair swatch.  However, it is not trivial to proceed to 3D volume reconstruction and measurement of a hair swatch using conventional technique like 3D laser scanner as a hair swatch is composed of a multitude of fibers and do not define a continuous solid object. Image processing based on density evaluation to separate between bulk and fly-away/frizz as developed for the single image technique is often necessary.

bolero Volume frizz static hair care claims efficient control straightening nutracos SPEquation 3D measurement

POSTER#2 : 

Evaluation of hair gloss on randomly oriented fibers using polarization imaging

Sam STOFEL (Procter & Gamble Beauty)
Robert GEORGE, Sébastien BREUGNOT (BOSSA NOVA Technologies)

Abstract : Visual appearance of hair gloss is defined by multiple parameters such as Color (diffused light), Shine (surface reflection), Chroma (internal reflection). In previous work, Bossa Nova Technologies developed the now standard instrument SAMBA Hair System that can extract the three first components using polarization imaging. Such extraction requires that the hair fibers be aligned a certain way toward the polarization imaging device. In this work, Bossa Nova Technologies and P&G Beauty jointly introduce a method for the measurement of Shine, Chroma and Diffused light on randomly oriented hair fibers, based on polarization imaging. The underlying physics allowing this extraction will be laid out and the first prototype developed will be described. This new system will open the door to true, in-vivo quantification of Shine, Chroma and Diffused light. Finally, we will present the first tests conducted on real subjects and discuss the practical parameters that could be used from research to claim substantiation.

PRESENTATION : 

Quantifying hair motion

Trefor EVANS (TRI Princeton)
Sébastien BREUGNOT (BOSSA NOVA Technologies)

Abstract :

Every TV hair care commercial we’ve ever seen, at some point, showed a model flipping her hair around in a beautiful flowing manner. Clearly, this motion is a characteristic of attractive, healthy and beautiful hair; but this topic has received surprisingly little attention in the scientific literature.

Even relatively crude experimental set-ups visually illustrate that different sources and states of hair do indeed move very differently. For example, thick heavy Asian hair moves very differently to fine Caucasian hair; curly hair moves differently to straight hair; chemically damaged hair moves differently to healthy hair. With this said, a means of quantification is not readily forthcoming.      

This work involves using the imaging system of a commercial Bossa Nova Technologies Bolero® device to capture and then analyze hair motion. The new instrument is called Hula®.

A tress holder allows for anchoring of a hair sample which can then be oscillated at different frequencies. A video capture of the moving hair is acquired where each frame can then be analyzed for tress position and shape.

The amplitude of this oscillating motion varies as function of hair type. Possibly more important, so too does the shape of amplitude versus frequency curves. In addition, the shape and integrity of the hair tress can be analyzed to determine relative levels of bulk and flyaway fibers.       

This presentation discusses both the hardware and software associated with this new device. In addition, we will also show results from a number of systematic experiments involving variations in hair properties that might predicted to impact motion.  

We hope to see you at the conference !