6,142 research outputs found
Facial feature detection and tracking with a 3D constrained local model
No full textThis thesis establishes a framework for facial feature detection and human
face movement tracking. Statistical models of shape and appearance are
built to represent the human face structure and interpret target images of
human faces. The approach is a patch-based method derived from an earlier
proposed method, the constrained local model (CLM) [1] algorithm.
In order to increase the ability to track face movements with large head
rotations, a 3D shape model is used in the system. And multiple texture
models from different viewpoints are used to model the appearance. During
fitting or tracking, the current estimate of pose (shape coordinates) is used
to select the appropriate texture model. The algorithm uses the shape model
and a texture model to generate a set of region template detectors. A search
is then performed in the global pose / shape space using these detectors.
Different optimisation frameworks are used in the implementation. The
training images are created by rendering expressive 3D face models with
different scales, rotations, expressions, brightness, etc.
Experimental results are demonstrated by fitting the model to image
sequences with large head rotations to evaluate the performance of the
algorithm. To evaluate the stability and selection of factors of the algorithm,
more experiments are carried out. The results show that the proposed 3D
constrained local model algorithm improves the performance of the original
CLM algorithm for videos with large out-of-plane head rotations
Two-dimensional computer-generated average human face morphology and facial approximation
No full textCarl N. Stephan, Ian S. Penton-Voak, David I. Perrett, Bernard P. Tiddeman, John G. Clement, and Maceij Henneber
Synthesis of facial ageing transforms using three-dimensional morphable models
No full textSupplementary material restricted permanentlyThe ability to synthesise the effects of ageing in human faces has numerous uses from aiding
the search for missing people to improving recognition algorithms and aiding surgical
planning.
The principal contribution of this thesis is a novel method for synthesising the visual effects
of facial ageing using a training set of three-dimensional scans to train a statistical
ageing model. This data-base is constructed by fitting a statistical Face Model known as a
Morphable Model to a set of two dimensional photographs of a set of subjects at different
age points in their lives. We verify the effectiveness of this algorithm with both quantitative
and psychological evaluation. Most ageing research has concentrated on building models
using two-dimensional images. This has two major shortcomings, firstly some of the information
related to shape change may be lost by the projection to two-dimensions; secondly
the algorithms are very sensitive to even slight variations in pose and lighting. By using
standard face-fitting methods to fit a statistical face model to the image we overcome these
problems by reconstructing the lost shape information, and can use a model of physical
rotations and light transfer to overcome the issues of pose and rotation. We show that the
three-dimensional models captured by face-fitting offer an effective method of synthesising
facial ageing.
The second contribution is a new algorithm for ageing a face model based on Projection to
Latent Structures also known as Partial Least Squares. This method attempts to separate
the training set into a set of basis vectors that best explains the shape and colour changes
related to ageing from those factors within the training set that are unrelated to ageing. We
show that this method is more accurate than other linear techniques at producing a face
model that resembles the individual at the target age and of producing a face image of the
correct perceived age.
The third contribution is a careful evaluation of three well known ageing methods. We use
both quantitative evaluation to determine the accuracy of the ageing method, and perceptual
evaluation to determine how well the model performs in terms of perceived age increase
and also identity retention. We show that linear methods more accurately capture ageing
and identity information if they are trained using an individualised model, and that ageing
is more accurately captured if PLS is used to train the model
Interview with Bernard Cache, author of "Earth Moves: The Furnishing of Territories" (MIT Architectural Press)
No full textBernard Brodie and the bomb: at the birth of the bipolar world
No full textBernard Brodie (1910-1978) was a leading 20th century theorist and philosopher of war. A key architect of American nuclear strategy, Brodie was one of the first civilian defense intellectuals to cross over into the military world. This thesis explores Brodie’s evolution as a theorist and his response to the technological innovations that transformed warfare from World War II to the Vietnam War. It situates his theoretical development within the classical theories of Carl von Clausewitz (1780-1831), as Brodie came to be known as “America’s Clausewitz.” While his first influential works focused on naval strategy, his most lasting impact came within the field of nuclear strategic thinking. Brodie helped conceptualize America’s strategy of deterrence, later taking into account America’s loss of nuclear monopoly, the advent of thermonuclear weapons, and proliferation of intercontinental ballistic missiles. Brodie’s strategic and philosophical response to the nuclear age led to his life-long effort to reconcile Clausewitz’s theories of war, which were a direct response to the strategic innovations of the Napoleonic era, to the new challenges of the nuclear age. While today’s world is much changed from the bipolar international order of the Cold War period, contemporary efforts to apply Clausewitzian concepts to today’s conflicts suggests that much can be learned from a similar endeavor by the previous generation as its strategic thinkers struggled to imagine new ways to maintain order in their era of unprecedented nuclear danger.acceptedVersionei tietoa saavutettavuudest
Visual ageing of human faces in three dimensions using morphable models and projection to latent structures
No full textWe present an approach to synthesising the effects of ageing on human face images using three-dimensional modelling. We extract a set of three dimensional face models from a set of two-dimensional face images by fitting a Morphable Model. We propose a method to age these face models using Partial Least Squares to extract from the data-set those factors most related to ageing. These ageing related factors are used to train an individually weighted linear model. We show that this is an effective means of producing an aged face image and compare this method to two other linear ageing methods for ageing face models. This is demonstrated both quantitatively and with perceptual evaluation using human raters
Paroles de Bernard Lambert : un paysan révolutionnaire
Get PDFLe texte publié est la transcription des paroles prononcées par Bernard Lambert le 4 mai 1981 au séminaire « Luttes dans et pour l'espace rural » de Françoise Bourquelot et Nicole Mathieu à l'EHESS. Un récit de trente ans d'histoire du syndicalisme paysan, qui montre une pensée d'avant-garde, une ouverture sur les problèmes internationaux, une capacité de se projeter dans l'avenir. A former union member testimony and commitment The history of French farmers' unions since thirty years is related by Bernard LAMBERT (1931-1984), a long-time trade unionist, founder member of the union « Paysans travailleurs » and author of the book entitled Les paysans dans la lutte des classes (1970). Bernard LAMBERT's talk to a seminar held in Paris on May 4th 1981 at the EHESS, reveals, through debates put back in their context, his avant-garde ideas, his concern for international problems and his will to anticipate the future
Richard Bernard and His Publics: A Puritan Minister as Author
No full textDrawing upon approaches from history, literature, and religious studies, this dissertation enhances our understanding of the confluence of religion, print, politics, and society during a key transitional period in European history. In particular, it uses the case study of "author-minister" Richard Bernard to examine the relationship between print authorship and parish ministry in early seventeenth century England. Although it is well known that many early modern ministers became authors through the publication of sermons, few scholars have considered the more active role that some ministers took in producing works specifically designed for a print medium. Because preaching, teaching and other professional activities could easily fill the entirety of a minister’s time, it is important to consider the reasons these author-ministers chose to pursue publication and the goals that they had for their works. The dissertation demonstrates that authorship could become an integral part of the clerical vocation as author-ministers intentionally targeted different audiences through a variety of genres in order to further England’s reformation and religious unification within their own parishes and beyond.
The dissertation is centered upon the career of Bernard, whose life and work are ideally positioned to highlight many aspects of early Stuart parish and print ministry. In his works, the connection between pastoral ministry and print is particularly strong. For instance, one can often pinpoint specific events that influenced not only the timing but also the content of publications. In addition, Bernard was particularly explicit, both in his private correspondence and in print, about his goals as an author, his imagined audience, and his purposes for seeking publication. By placing his print works alongside records from his ministry, it is possible to reconstruct ways that Bernard’s pastoral vocation and authorial work mutually influenced one another, as well as how he conceived of these dual roles
Clipping about F.R. Bernard, 12 October 1911
Get PDFhttps://egrove.olemiss.edu/bernard/1062/thumbnail.jp
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