L'objectif de la thèse est d'étudier l'application de propriétés perceptives au traitement d'images numérisées. Ce projet confronte deux mondes fort éloignés: l'étude du système visuel humain (HVS) qui se rattache à la neurophysiologie et à la psychophysique et le traitement d'images qui fait partie du domaine de l'informatique et des télécommunications.

Image-based humanities computing, the computer-assisted study of digitallyrepresented “objects or artifacts of cultural heritage,” is an increasingly popular yet “established practice” located at the most recent intersections of humanities scholarship and “digital imaging technologies,” as Matthew Kirschenbaum has pointed out. Many exciting things have been and are being done in this field, as multifaceted multimedia projects and “advanced visual and visualization tools” continue to be produced and used; but it also seems to lack definition and seems unnecessarily limited in its critical approach to digital images. That is, the textual mediation required to make images usable or knowable, and the kinds of knowledge images offer, often goes unexamined, and the value of creative or deformative responses to images overlooked. This thesis will suggest Blake’s production of the Laoco¨on as a model for a more open and relevant approach to images, will analyze what image-based humanities computing does and how Blake’s engraving recapitulates these actions, and will describe how acritical approaches to image description could be integrated and used, and how images could function as graphic mediation for other materials, in this field. Blake’s idiosyncratic Laoco¨on exemplifies the ways that creators or editors respond to and describe images and the ways they use images to illuminate text. In entitling his plate “[Jah] & his two Sons [. . . ]” and filling it with descriptive text, Blake shares the focus of image-based humanities computing on images as things to be broken down, described, and understood. But Blake’s classification and description, deformative in misreading the image, reveals the true nature of such mediation and the need for a more open system, one which allows observers to record how they interpret an image, perhaps best accomplished in image-based humanities computing through semantic web technologies like folksonomy tagging or collaborative wiki formats. And Blake’s act of pulling a pre-existing image out of context and applying it to a new textual work suggests a new function for images and the highly structured image databases of image-based humanities computing, to clarify or complicate textual works through graphic mediation.

Abstract A naturally system is usually modeled as a causal system, in which the present output is determined by the past inputs. In contrast, the noncausal system is modeled by the future inputs in addition to the past inputs, and is also less explored. In this thesis, we apply the noncausal modeling to the image restoration for the blurred images corrupted by additive white Gaussian noise. We applied three methods for our image deblurring problem. The first method is exploiting the compound Gauss-Markov image model, which has been proven useful in image restoration. The image is restored in two steps iteratively: restoring the line field by the assumed image field and restoring the image field by the just computed line field. The second method is to apply the Kalman filter using the above the compound Gauss-Markov image model and the line field. The third method is to apply the Kalman filter without using the line field. Our experiments have shown the second method to be the best among the three methods.

Diss.--Universität, Würzburg, 1995. / Bibliogr. p. 203-212. Index.

Texte remanié de: Dissertation--Theologische Fakultät--Universität Heidelberg, Wintersemester 1996/97. / Bref résumé en anglais. Bibliogr. p. 485-531.

Diplôme de conservateur de bibliothèque--Villeurbanne--ENSSIB, 1998.

Texte remanié de: Doct. th.--Glasgow, 2002. / Bibliogr. p. 209-221.

Texte remanié de: Thèse de doctorat--Arts plastiques--Strasbourg 2, 2003. Titre de soutenance : Errances du regard sur les pierres : émergences-effacements. / Bibliogr. p. 279-298.

Mémoire de master professionnel 2e année : Réseaux d'information et document électronique : Villeurbanne, ENSSIB : 2003. / Texte intégral.

Mémoire de master professionnel 2e année : Réseaux d'information et document électronique : Villeurbanne, ENSSIB : 2003. / Texte intégral.