Jonathan Arney

EDGE REFLECTION ANALYSIS: A NEW TECHNIQUE FOR THE DOCUMENTATION AND CHARACTERIZATION OF PHOTOGRAPHIC AND OTHER GLOSSY SURFACES

Abstract A new analytical technique for surface texture analysis is presented, called edge reflection analysis (ERA). The technique uses a digital image of the specular reflection of a diffuse light source on a glossy surface to calculate texture properties, like average angle of surface elements and their spatial frequency. Simple equipment and easily accessible software were used to create the required equipment and for image analysis and data evaluation. The technique was developed for the analysis of touch-sensitive objects, like photographs, in cases where existing analytical techniques are not affordable or are unsuitable. During a field test, manufacturers’ paper sample books and a collection of prints by Edward Weston at the George Eastman House, International Museum of Photography and Film, were examined.