25 novembre 2014
San Francesco - Via della Quarquonia 1 (Classroom 2 )
Saliency Based Selection for Content Aware Image Resizing Content-aware image resizing techniques allow to take into account the visual content of images during the resizing process. The basic idea beyond these algorithms is the removal of vertical and/or horizontal paths of pixels (i.e., seams) containing low salient information. In this talk a method which exploits the Gradient Vector Flow (GVF) of the image to establish the paths to be considered during the resizing will be presented. The relevance of each GVF path is straightforward derived from an energy map related to the magnitude of the GVF associated to the image to be resized. To make more relevant the visual content of the images during the content-aware resizing, we also propose to select the generated GVF paths based on their visual saliency properties. In this way, visually important image regions are better preserved in the final resized image. The proposed technique has been tested, with good performances, both qualitatively and quantitatively, by considering a representative dataset of 1000 images labeled with corresponding salient objects (i.e., ground-truth maps).
Battiato , Sebastiano - Università degli Studi di Catania - Catania