209 Result(s)
within
English
Computer Science
Computer Graphics
Image Processing and Computer Vision
Ben Ep**er
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Chapter and Conference Paper
Applying VC-dimension analysis to object recognition
We analyze the amount of information needed to carry out various model-based recognition tasks, in the context of a probabilistic data collection model. We focus on objects that may be described as semi-algebr...
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Chapter and Conference Paper
Feature detection using oriented local energy for 3D confocal microscope images
The ability to detect features within confocal microscope images is important for the interpretation and analysis of such data. Most detectors are gradient-based, and so are sensitive to noise, and fail to acc...
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Chapter and Conference Paper
Evaluating the Complexity of Databases for Person Identification and Verification
Databases play an important role for the development and evaluation of methods for person identification, verification, and other tasks. Despite this fact, there exists no measure that indicates whether a give...
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Chapter and Conference Paper
Model Based Pose Estimator Using Linear-Programming
Given a 3D object and some measurements for points in this object, it is desired to find the 3D location of the object. A new model based pose estimator from stereo pairs based on linear programming (lp) is prese...
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Chapter
Optics for Omnistereo Imaging
Omnistereo Panoramas use a new scene-to-image projection, the circular projection, that enables stereo in a full 360° panoramic view. Circular projections are necessary since it is impossible to cre...
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Chapter and Conference Paper
A Variational Approach to Maximum a Posteriori Estimation for Image Denoising
Using first principles, we establish in this paper a connection between the maximum a posteriori (MAP) estimator and the variational formulation of optimizing a given functional subject to some noise constraints....
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Chapter and Conference Paper
On Computing Visual Flows with Boundaries: The Case of Shading and Edges
Many visual tasks depend upon the interpretation of visual structures that are flow fields, such as optical flow, oriented texture, and shading. The computation of these visual flows involves a delicate tradeo...
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Chapter and Conference Paper
Guided Sampling and Consensus for Motion Estimation
We present techniques for improving the speed of robust motion estimation based on random sampling of image features. Starting from Torr and Zisserman’s MLESAC algorithm, we address some of the problems posed ...
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Chapter and Conference Paper
Efficient and Consistent Recursive Filtering of Images with Reflective Extension
Recursive filters are commonly used in scale space construction for their efficiency and simple implementation. However these filters have an initialisation problem which either produces unusable results near ...
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Chapter and Conference Paper
Image Registration and Segmentation by Maximizing the Jensen-Rényi Divergence
Information theoretic measures provide quantitative entropic divergences between two probability distributions or data sets. In this paper, we analyze the theoretical properties of the Jensen-Rényi divergence ...
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Chapter and Conference Paper
Geodesic Object Representation and Recognition
This paper describes a shape signature that captures the intrinsic geometric structure of 3D objects. The primary motivation of the proposed approach is to encode a 3D shape into a one-dimensional geodesic dis...
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Chapter and Conference Paper
Automatic Tracking of Arabidopsis thaliana Root Meristem in Confocal Microscopy
The Arabidopsis thaliana is a well defined and a suited system to study plant development at the cellular level. To follow in vivo the root meristem activity under a confocal microscope the image acquisition proc...
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Chapter and Conference Paper
3D Face Modeling Based on Structured-Light Assisted Stereo Sensor
In this paper we present a 3D human face reconstruction framework based on stereo sensor coupled with a structured lighting source. Starting from two calibrated images, the active part (video projector) which ...
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Article
A multi-user desktop virtual environment for teaching shop-kee** to children
Virtual role-playing environments can be a powerful mechanism of instruction, provided they are constructed such that learning how to play and win the game contributes to a player’s understanding of real-world...
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Chapter and Conference Paper
A New Video Images Text Localization Approach Based on a Fast Hough Transform
The amount of digital video data is increasing over the world. It highlights the need for efficient algorithms that can retrieve this data by content. The full use of this media is currently limited by the opa...
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Chapter and Conference Paper
A 3-D Computational Model for Multicellular Tissue Growth
We report the development of a computational model for the growth of multicellular tissues using a discrete approach based on cellular automata to study the tissue growth rates and population dynamics of two d...
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Chapter and Conference Paper
Camera Self-calibration in Scheimpflug Condition for Air Flow Investigation
Camera calibration is a necessary preliminary step to ensure high quality measurement in a section of a flow. The bundle adjustment technique is based on redundancy resulting from multi-viewing the calibration...
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Chapter and Conference Paper
Digitisation and 3D Reconstruction of 30 Year Old Microscopic Sections of Human Embryo, Foetus and Orbit
A collection of 2200 microscopic sections was recently recovered at the Netherlands Ophthalmic Research Institute and the Department of Anatomy and Embryology of the Academic Medical Centre in Amsterdam. The s...
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Article
Characterizing human shape variation using 3D anthropometric data
Characterizing the variations of the human body shape is fundamentally important in many applications ranging from animation to product design. 3D scanning technology makes it possible to digitize the complete...
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Chapter and Conference Paper
Video Sequence Querying Using Clustering of Objects’ Appearance Models
In this paper, we present an approach for addressing the ‘query by example’ problem in video surveillance, where a user specifies an object of interest and would like the system to return some images (e.g. top...
