DigiPix > CASE STUDY: DENIM
THE APPLICATION: - Reliable Imaging & Measurement of Denim Wash Effects
The DigiEye system is used for the imaging and colour measurement of samples, impossible to assess using a standard spectrophotometer. A spectrophotometer measures a small area, usually up to 30mm in diameter giving an average result and therefore is totally unsuitable for measuring garments of this type.
The DigiEye system can image a larger area to concentrate on a pocket or knee image or even a whole pair of jeans with the use of the Large Area Imaging Cabinet.
ISSUE 1: - Denim Wash Effects - The inaccuracy of a Spectrophotometer.
Colour Measurement has traditionally relied on spectrophotometers, however they were designed to measure very flat areas of 2D solid colour. A spectrophotometer works by averaging all the pixels of colour in the small area measured and so is inaccurate when measuring a variable area that varies across the surface such as washed or enzyme treated denim fabric.
DigiEye can image a much larger area of the Denim to produce visual standards for the degree of washdown on a critical area such as the pocket or fly.
The DigiEye DigiPix software can select different sized samples for colour measurement from as small as one pixel up to a large area of the image. By taking a larger sample area the average measurement of all of the pixels is more accurate.
In the image below (denim stonewash example) two different time periods of stonewashing are compared with the second example a DE of 1.29 Darker, Weaker and Greener to the first.
More accurate reporting of the Denim appearance can be achieved by using the DigiPix Colour Clustering technique. Colour Clustering works by automatically grouping pixels of the same colour together and reporting them as a percentage of the total, thus the number of white pixels can be compared to the number of coloured pixels for example.
THE TECHNICAL BIT
The calibrated camera captures data in RAW format for very high-resolution images; since the image is captured in controlled and consistent lighting, produced by VeriVide, the software can transform the RGB data from the camera into CIE colour space thereby enabling accurate non-contact Colour Measurement of the Denim fabric.
Consistency is the key, as the environment is controlled, measurements are repeatable. The image can be retained with its associated data for visual assessment and correlation.
The software also contains a choice of Colour difference equations so that components can be imaged with and compared to an agreed standard component.
The DigiPix Colour Replacement software also enables an object to be recoloured using colour information from a variety of sources including Pantone colours, or company colour library information in several data formats. The appearance of the Denim fabric is retained during the recolouration enabling an accurate visualisation of the final colour.
THE BENEFITS
With DigiEye and the DigiPix Software, manufacturers and suppliers can image Denim fabrics to accurately capture the critical area of the fabric to produce visual standards for the degree of washdown.
Any colour measurements of these imaged areas are more accurate than that supplied by a spectrophotometer as the whole of the critical area is measured not just a small piece.
The images and any associated colour data can be communicated quickly and easily between suppliers and retailers, enhancing the communication of these often-subjective effects.
Using the DigiPix Colour Replacement feature, the surface appearance of the Denim fabric is taken into consideration. This provides enhanced visualisation during the product development of new colourways and is very useful for designers and buyers who can use the software to decide on the most appropriate colours before ordering real sampling.
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The recolouration can be seen in the example above ; the jeans on the left in the original shade have been recoloured to produce the image on the right.
WISH TO KNOW MORE?
Further details of the DigiEye System - including the Large Area Imaging (LAI), are available via the Datasheet below (click on the relevant links to download or open).
Alternatively please contact Pete Laban - Sales Manager to arrange a demonstration.
| DIGIEYE DATASHEET | LAI - DATASHEET | CONTACT PETE LABAN |
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| DOWNLOAD PDF | DOWNLOAD PDF | p.laban@verivide.com |