Resumen de Preliminary evaluation of HDR tone mapping operators for cultural heritage
Rossella Suma, Georgia Stavropoulou, Elisavet K. Stathopoulou, Luc van Gool, Andreas Georgopoulos, Alan Chalmers
The ability of High Dynamic Range (HDR) imaging to capture the full range of lighting in a scene has led to an increasinginterest in its use for Cultural Heritage (CH) applications. Photogrammetric techniques allow the semi-automaticproduction of 3D models from a sequence of images. Current photogrammetric methods are not always effectivein reconstructing objects under harsh lighting conditions, as significant geometric details may not have been capturedaccurately in under- and over-exposed regions of the images. HDR imaging offers the possibility to overcome thislimitation. In this paper we evaluate four different HDR tone-mapping operators (TMOs) that have been used to convertraw HDR images into a format suitable for state-of-the-art photogrammetric algorithms, and in particular keypointdetection techniques. The evaluation criteria used are the number of keypoints and the number of valid matchesachieved. The comparison considers two local and two global TMOs.
