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Searching for authors named "Ioannis Pitas" – sorted by Relevance.

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  • Shape-Based Interpolation of Binary 3-D Images using Morphological Skeletonization  
  • by Vassilios Chatzis, Ioannis Pitas
  • …In this paper, the Morphological Skeleton Interpolation (MSI) algorithm is presented. It is an efficient shape-based interpolation method used for interpolating slices between successive slices of a 3-D object. It is based on the well known mathematical morphology procedure of morphological skeleton…
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  • A Robust Feature-Based Technique for Watermarking Frontal Face Images  
  • by Athanasios Nikolaidis, Ioannis Pitas
  • …This paper presents a technique for watermarking frontal face images based on extracting a finite set of features that are robust under such attacks. Experimentation is being done in the direction of finding ways to extract robust features for any class of images.…
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  • Audio-Visual Content Analysis for Content-based Video Indexing  
  • by Sofia Tsekeridou, Ioannis Pitas — 1999 — in Proc. of 1999 IEEE Int. Conf. on Multimedia Computing and Systems
  • …An audio-visual content analysis method is presented, which analyzes both auditory and visual information sources and accounts for their inter-relations and coincidence to extract high-level semantic information. Both shotbased and object-based access to the visual information is employed. Due to th…
  • Cited by 11 (3 self) – Add To MetaCart
  • Segmentation and Tracking of Faces in Color Images  
  • by Karin Sobottka, Ioannis Pitas — 1996 — In Proc. of the Second Intl. Conf. on Automatic Face and Gesture Recognition
  • …In this paper we present a new approach for automatically segmentation and tracking of faces in color images. Segmentation of faces is performed by evaluating color and shape information. First, skin-like regions are determined based on the color attributes hue and saturation. Then regions with elli…
  • Cited by 42 (1 self) – Add To MetaCart
  • Digital Restoration of Painting Cracks  
  • by Ioannis Giakoumis, Ioannis Pitas — 1998 — in ISCAS ’98, Proceedings of the IEEE International Symposium on Circuits and Signals, 31 May-3
  • …In this paper we develop a method for the restoration of cracks on a painting. First, we detect the local minima (they can be either cracks or painting brush strokes), by using a morphological highpass operator, called top-hat transformation. The crack filling procedure must be applied only on the c…
  • Cited by 11 (3 self) – Add To MetaCart
  • Extraction of Facial Regions and Features using Color and Shape Information  
  • by Karin Sobottka, Ioannis Pitas — 1996 — in Proceedings of the International Conference Of Pattern Recognition (ICPR ’96
  • …There are many applications for systems coping with the problem of face localization and recognition, e.g. model-based video coding, security systems, mug shot matching. Due to variations in illumination, background, visual angle and facial expressions, the problem of machine face recognition is com…
  • Cited by 15 (1 self) – Add To MetaCart
  • Content-based Video Parsing and Indexing based on Audio-Visual Interaction  
  • by Sofia Tsekeridou, Ioannis Pitas — 2001
  • …A content-based video parsing and indexing method is presented in this paper, which analyzes both information sources (auditory and visual) and accounts for their inter-relations and synergy to extract high-level semantic information. Both frame-based and object-based access to the visual informatio…
  • Cited by 15 (2 self) – Add To MetaCart
  • Old Painting Digital Color Restoration  
  • by Michail Pappas, Ioannis Pitas — 1998 — in Proc. Of Noblesse Workshop on
  • …Many old paintings suffer from the effects of certain physicochemical phenomena, that can seriously degrade their overall visual appearance. Digital image processing techniques can be utilized for the purpose of restoring the original appearance of a painting, with minimal physical interaction w…
  • Cited by 1 (0 self) – Add To MetaCart
  • Digital Color Restoration Of Old Paintings  
  • by Michalis Pappas, Ioannis Pitas — 2000
  • …Many old paintings su#er from the e#ects of certain physicochemical phenomena, that can seriously degrade their overall visual appearance. Cleaning methods, that utilize chemical treatment substances, can not always be used, due to possible deterioration of the painting surface or reduction of the p…
  • Cited by 5 (1 self) – Add To MetaCart
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