196,106 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
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
The Cantelowe Accounts - Multilingual merchant records from Tuscany, 1450-1451
No full textThe Cantelowe Accounts appear to offer the earliest evidence of an English merchant using Italian as a second language. They were written by John Balmayn, an unknown Londoner, who travelled to Tuscany to oversee the sale of a valuable wool shipment in 1450-51 on behalf of his master - the Mercer, Sir William Cantelowe. The author uses an intriguing mix of four languages, combining Middle English, Latin and Anglo-French with the administrative Tuscan that he has learnt working alongside Florentine partners, such as the Salviati company. Two other striking features of the text are the extensive use of Arabic numerals, unparalleled in fifteenth-century English accounting, and the unusually detailed descriptions of merchant marks that were used to identify the woolsacks. Overall, the accounts are unique amongst multilingual medieval sources and will interest economic historians and historical linguists alike
Simulation of thermal plant optimization and hydraulic aspects of thermal distribution loops for large campuses
No full textFollowing an introduction, the author describes Texas A&M University and its utilities system. After that, the author presents how to construct simulation models for chilled water and heating hot water distribution systems. The simulation model was used in a $2.3 million Ross Street chilled water pipe replacement project at Texas A&M University. A second project conducted at the University of Texas at San Antonio was used as an example to demonstrate how to identify and design an optimal distribution system by using a simulation model. The author found that the minor losses of these closed loop thermal distribution systems are significantly higher than potable water distribution systems. In the second part of the report, the author presents the latest development of software called the Plant Optimization Program, which can simulate cogeneration plant operation, estimate its operation cost and provide optimized operation suggestions. The author also developed detailed simulation models for a gas turbine and heat recovery steam generator and identified significant potential savings. Finally, the author also used a steam turbine as an example to present a multi-regression method on constructing simulation models by using basic statistics and optimization algorithms. This report presents a survey of the author??s working experience at the Energy Systems Laboratory (ESL) at Texas A&M University during the period of January 2002 through March 2004. The purpose of the above work was to allow the author to become familiar with the practice of engineering. The result is that the author knows how to complete a project from start to finish and understands how both technical and nontechnical aspects of a project need to be considered in order to ensure a quality deliverable and bring a project to successful completion. This report concludes that the objectives of the internship were successfully accomplished and that the requirements for the degree of Degree of Engineering have been satisfied
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
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