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31	A high resolution 3D and color image acquisition system for long and shallow impressions in crime scenes Egoda Gamage, Ruwan Janapriya January 2014 (has links) Indiana University-Purdue University Indianapolis (IUPUI) / In crime scene investigations it is necessary to capture images of impression evidence such as tire track or shoe impressions. Currently, such evidence is captured by taking two-dimensional (2D) color photographs or making a physical cast of the impression in order to capture the three-dimensional (3D) structure of the information. This project aims to build a digitizing device that scans the impression evidence and generates (i) a high resolution three-dimensional (3D) surface image, and (ii) a co-registered two-dimensional (2D) color image. The method is based on active structured lighting methods in order to extract 3D shape information of a surface. A prototype device was built that uses an assembly of two line laser lights and a high-definition video camera that is moved at a precisely controlled and constant speed along a mechanical actuator rail in order to scan the evidence. A prototype software was also developed which implements the image processing, calibration, and surface depth calculations. The methods developed in this project for extracting the digitized 3D surface shape and 2D color images include (i) a self-contained calibration method that eliminates the need for pre-calibration of the device; (ii) the use of two colored line laser lights projected from two different angles to eliminate problems due to occlusions; and (iii) the extraction of high resolution color image of the impression evidence with minimal distortion.The system results in sub-millimeter accuracy in the depth image and a high resolution color image that is registered with the depth image. The system is particularly suitable for high quality images of long tire track impressions without the need for stitching multiple images. 3D image capture footprint impression acquisition forensics structured light tire impression acquisition High resolution imaging Images, Photographic Lasers Computer vision -- Research Lighting -- Research -- Design Three-dimensional display systems Image processing -- Digital techniques Materials -- Analysis -- Data processing Quality control -- Optical methods Footwear -- Identification Tires -- Identification Optical pattern recognition Forensic sciences Crime scene searches
32	Les « modèles » égyptiens en bois : matériau, fabrication, diffusion, de la fin de l’Ancien à la fin du Moyen Empire (env. 2350-1630 av. J.-C) / Egyptian Wooden Models : materials, manufacturing, spread, from the End of the Old Kingdom to the End of the Middle Kingdom (circ. 2350-1630 BC) Eschenbrenner-Diemer, Gersande 20 December 2013 (has links) Le premier volume est consacré à l’analyse des matériaux et des techniques utilisées pour la fabrication des « modèles » funéraires, c’est-à-dire, les maquettes en bois représentant des personnages ou des scènes de la vie quotidienne, typiques du mobilier funéraire des élites entre la fin de l’Ancien et la fin du Moyen Empire (env. 2350-1630 av. J.-C.). Dans une première partie, axée sur le matériel provenant des sites de Saqqâra, Assiout et Meir, les traits stylistiques et techniques ont été examinés afin de définir des groupes d’objets et identifier des ateliers de production. Des critères de datation ont ensuite été définis et comparés aux autres pièces du mobilier funéraire découverts dans les sépultures étudiées. Suivant un déroulé chronologique depuis la fin de l’Ancien Empire, la deuxième partie se concentre sur les ateliers de fabrication et les contacts interrégionaux. Une attention particulière est portée au rapport qui unit pouvoir royal, élites et artisans au travers de l’envoi d’équipements funéraires et plus particulièrement des modèles en bois découverts de la région memphite à la Haute-Égypte. La troisième partie s’intéresse aux fonctions sociales, économiques et religieuses des modèles et examine plus particulièrement le rapport étroit qui unit ce mobilier et les pratiques funéraires entre la fin de l’Ancien et la fin du Moyen Empire. Le deuxième volume présente le corpus des modèles en bois examinés. Un troisième volume est consacré aux annexes.L’examen des modèles en bois, significatif de profonds changements politiques et religieux à l’origine de nouvelles coutumes et croyances funéraires entre la VIème et la XIIIème dynastie, précise le contexte géographique, historique et social associé à la fabrication et à l’utilisation de ce mobilier et permet d’affiner la perception du rapport entre artisans et pouvoir, rapport omniprésent dans la société égyptienne antique dès la période prédynastique. / The first part focuses on material analysis and process use for the manufacturing of funerary “models”. These wooden objects represent people or everyday scenes of life, used by Egyptian elites for funeral furniture between the end of the Old Kingdom to the end of the Middle Kingdom (cir. 2350-1630 BC). In a first part, focused on objects from Saqqara, Assiut and Meir, the stylistic and technical features were examined to define groups of objects and workshops. Then, dating criteria were defined and compared with the funeral furniture discovered in the studied graves. According to one unwound chronological since the end of the Old Kingdom, the second part concentrates on workshops and interregional contacts. A particular attention is worn in the relationship between royal power, elites and craftsmen through the sending of funeral equipment and more particularly bare wooden models of the Memphite area to the Upper Egypt. The third part is interested in the social, economic and religious functions of the models and examines more particularly the narrow relationship which unites this furniture and the funeral practices between the end of the Old Kingdom to the end of the Middle Kingdom. The second volume presents the corpus of the examined wooden models. The third volume is dedicated to appendices. The examination of wooden models, significant of political and religious deep changes at the origin of new customs and funeral faiths between the VIth and the XIIIth dynasty, specifies the geographical, historic and social context associated with the manufacturing. The analysis of these objects allows refining the perception of the relationship between craftsmen and power, omnipresent in the Egyptian society from the Predynastic period. Modèles funéraires Statuaire privée Bois Saqqâra Meir Assiout Moyenne-Égypte Haute-Égypte Région memphite Nécropole VIe dynastie Première Période intermédiaire Moyen Empire Élites Artisans Ateliers Capitale Provinces Datation Provenance Analyses des matériaux Étude technique Traits stylistiques Pratiques funéraires Symbolique Économie Funerary models Statues Wood Saqqara Assiut Meir Necropolis Upper Egypt Middle Egypt Low Egypt VIth dynasty First Intermediate Period Middle Kingdom Elites Craftsmen Workshops Capital Provinces Dating-Origin Materials analysis Technical study Stylistic aspects Burial customs Symbolism Economy

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A high resolution 3D and color image acquisition system for long and shallow impressions in crime scenes

Les « modèles » égyptiens en bois : matériau, fabrication, diffusion, de la fin de l’Ancien à la fin du Moyen Empire (env. 2350-1630 av. J.-C) / Egyptian Wooden Models : materials, manufacturing, spread, from the End of the Old Kingdom to the End of the Middle Kingdom (circ. 2350-1630 BC)