Introduction to Colour Management Digitisation Of Heritage Materials Introduction to Colour Management CCHAD Project Introduction To Colour Management

Colour is always device dependent!!! Digitisation Of Heritage Materials The same image displayed on three different, uncalibrated systems Colour is always device dependent!!! Introduction To Colour Management

Human Vision - Colour SAME COLOUR!!! Dot colour 1 Dot colour 2 Digitisation Of Heritage Materials Human Vision - Colour SAME COLOUR!!! Dot colour 1 Dot colour 2 http://www.purveslab.net/main/ Introduction To Colour Management

Human Vision - Brightness Digitisation Of Heritage Materials Human Vision - Brightness Grey and White SAME SHADE OF GREY!!! http://www.purveslab.net/main/ Introduction To Colour Management

Human Vision - Contrast Digitisation Of Heritage Materials Human Vision - Contrast THE SQUARES ARE GREY!!! http://www.purveslab.net/main/ Introduction To Colour Management

White light components Digitisation Of Heritage Materials Concept of White Light White light is composed of all visible colours White light components White light Prism Introduction To Colour Management

Human Eye Spectral Sensitivity There are three types of colour sensitive photo-receptors (cones) in the human eye. They are mostly sensitive to blue, green and red spectrum of light.

Light sources

RGB - Red, Green, Blue Digitisation Of Heritage Materials Introduction To Colour Management

CMYK Cyan, Magenta, Yellow, blacK Digitisation Of Heritage Materials CMYK Cyan, Magenta, Yellow, blacK Introduction To Colour Management

Colour spaces and gamut Digitisation Of Heritage Materials Colour spaces and gamut Colour Space – specified range of displayable colours, used for a specific purpose, e.g. CMYK colour space is used for printing. GAMUT - range of colours that a colour system can display, capture or print Introduction To Colour Management

ICC profiles How they work Digitisation Of Heritage Materials ICC profiles How they work (colours converted from the “special” universal standard space into output device colour space) Profile attached to image Monitor STANDARD COLOUR SPACE Profiles used to correct output colours (colours converted from capture device colours into the “special” universal standard space colours) Original Image Printer ICC colour profile - information about how digital devices subjectively “see” colours Introduction To Colour Management

Colour Management basics Digitisation Of Heritage Materials Colour Management basics Colour calibrate monitors (screens) Create ICC colour profiles for the devices (scanners & cameras if applicable) Create ICC colour profiles for output devices (printers) Introduction To Colour Management

Screen colour calibration Special devices, together with dedicated software are being used for Colour calibration of monitors.

Capture devices colour calibration Digitisation Of Heritage Materials Capture devices colour calibration Special software and hardware is used to calibrate devices and ensure correct colour Introduction To Colour Management

Practical Colour Management Digitisation Of Heritage Materials Practical Colour Management Calibrate the monitor using an appropriate device (eg. Spyder Express, GretagMacbeth). Follow the prescribed procedure carefully. When you view images or want to print them out, make sure that you open them in software that uses ICC colour management (eg. Adobe Photoshop, Photoshop Elements, FastStone Viewer, Irfanview, GIMP), etc. MS Windows programs are often not the best option to use. Introduction To Colour Management

Benefits of system calibration Digitisation Of Heritage Materials Benefits of system calibration Consistent colour across various platforms – e.g. print matches the original Reduced time to obtain good colour results Much better chance of reproducing accurate colours in the future (better archival properties) Introduction To Colour Management

Xrite Colorchecker passport Digitisation Of Heritage Materials Xrite Colorchecker passport Colour management option https://www.kayellaustralia.com.au/xrite-colorchecker-passport-photo-p-1289.html $159 as of July 2019 Can be used with free software CoCa at http://www.dohm.com.au/coca/ Introduction To Colour Management

CCHAD Project – Coffs Harbour Council Digitisation Of Heritage Materials CCHAD Project – Coffs Harbour Council Andrew Stawowczyk Long email: andrew.long@chcc.nsw.gov.au Phone: +61 (0)408 478 522 Introduction To Colour Management