STRETCHING THE SURROGATE: AN INITIAL TEST COMBINING DSTRETCH IMAGE ENHANCEMENT WITH PHOTOGRAMMETRY MODELLING AT BUNJIL’S SHELTER AND GULGURN MANYA, AUSTRALIA

Abstract

This paper presents the initial results of a digitisation project exploring the combination of photogrammetric modelling with DStretch image enhancement and 3D model display within virtual reality head-mounted displays. Using the sites of Bunjil’s Shelter and Gulgurn Manya within or near Gariwerd as case studies, the paper outlines a process for applying DStretch image enhancement to photogrammetry textures and reapplying these textures to the 3D models, allowing a completely DStretch-enhanced 3D model to be viewed within virtual reality. Photogrammetry and DStretch enhancement have long been used in the documentation and analysis of rock art. However, few papers have reported on the potential benefits of combining the two methods, and no Australian papers to date have reported on the display of this combination within virtual reality. Under-discussed applications of photogrammetry are described, and the unique opportunities offered by the combination of the two methods are presented, particularly the ability to digitally trace motifs from the DStretch-enhanced model and separate motifs from the original photogrammetry model. The combination is demonstrated to be feasible at a low cost of time and equipment. Potential benefits of virtual reality display are discussed, emphasising Traditional Owner management, public outreach and education.