BOLERO
Hair Volume measurement
Fly-away / Frizz analysis
CURRENTLY UNAVAILABLE
See our page for the SHUFFLE and the BOLERO 360 attachment for a complete 3D Volume and Frizz analysis of your hair swatches
Features
360° VIZUALISATION
Imaging of your samples from 36 angles on a full rotation
PLUG & PLAY
No special installation is needed - easy cabling and the system is ready to go
3D RECONSTRUCTION
In-house algorithm for a full reconstruction of bulk and frizz volume
AUTO-CALIBRATED
An automatic calibration is done every time the software is launched
Overview
BOLERO is an imaging system dedicated to hair swatch 3D volume reconstruction and fly-away/frizz analysis. It is used in the cosmetic industry to substantiate claims and evaluate products efficacy such as conditioners, volumizing shampoo, shine sprays, etc.
BOLERO comes as a turn-key system including hardware and computer with dedicated software. Based on the acquisition of a sequence of contour images of a swatch, BOLERO delivers a 3D model of the hair swatch. The system also simultaneously provides volume measurements as part of the 3D model, including frizz/fly-away analysis.
A user-friendly software allows the user to acquire the measurement in one click. A complete analysis of the hair swatch (volume, bulk, fly-away etc.) of the hair is delivered in less than 2 minutes. Numerical data (fly-away distribution, bulk distribution, profiles, etc.), 3D point clouds and images can be quickly compared and exported for reports, presentations or post processing.
Principle
Hair swatch is not easy to analyze because it is composed of a multitude of individual fibers, and its boundaries are not well defined. Therefore, it is nearly impossible to use a commercial 3D scanner to reconstruct the 3D shape of the hair swatch.
Using uniform back-light illumination, we can measure the transmission of the light through the hair swatch with a standard black and white image of the sample. For each pixel of the image, we measure the light transmitted.
If the transmission :
- is inferior to a defined threshold, this corresponds to a high-density area and we can define the pixel as part of the bulk
- is higher than the defined threshold, this is a low-density area and we can define the pixel as part of the fly-away / frizz
In BOLERO, we use a threshold of 50%.
Due to the irregularity of the shape of a hair swatch, measuring volume with only one image will necessary induce a lot of errors. The BOLERO uses a rotatory platform so that 36 images – 1 every 10 degrees – of a single sample will be taken.
A reconstruction technique is then performed, and uses the sequence of contours – or silhouettes – acquired by the BOLERO to reconstruct the 3D shape of both the bulk and the frizz volume.
On the adjacent figure, all the images from the raw gray-scales to the processed bulk and frizz separation images are displayed for all the available angle values.
Specifications
Processed images XYZ Point cloud | |
Windows 10 | |
(375mm x 750mm x 500mm) | |
Resources
Documentation
BOLERO - Sample Report
This report has been graciously shared with us
by our partner SP Equation (France)
Scientific publications
