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Vision, Image and Signal Processing, IEE Proceedings -

Issue 3 • Date 3 June 2005

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Displaying Results 1 - 14 of 14
  • Least squares phase unwrapping in wavelet domain

    Publication Year: 2005 , Page(s): 261 - 267
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (435 KB)  

    Two-dimensional phase unwrapping is an important processing step in some coherent imaging applications. Least squares phase unwrapping is one of the robust techniques used to solve two-dimensional phase unwrapping problems. However, owing to its sparse structure, the convergence rate is very slow, and some practical methods have been applied to improve this condition. A new method for solving the ... View full abstract»

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  • Frequency shift keyed narrowband interference rejection: optimal exponential weighting factor for the RLS algorithm

    Publication Year: 2005 , Page(s): 268 - 274
    Click to expandAbstract | PDF file iconPDF (298 KB)  

    Cochannel narrowband interference can limit the performance of direct sequence spread spectrum (DSSS) and high frequency (HF) systems. Narrowband interference (NBI) can be single tone, chirped or frequency shift keyed (FSK) in nature and numerous techniques for its removal have been proposed. Linear adaptive prediction filters based on autoregressive modelling have been suggested owing to their ab... View full abstract»

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  • Newton type algorithm on Riemannian manifolds applied to robot vision, and suggestions for improvement of its performance

    Publication Year: 2005 , Page(s): 275 - 282
    Click to expandAbstract | PDF file iconPDF (471 KB)  

    In visual servo control of a robot, we often encounter the structure-from-motion problem. To study the structure-from-motion problem, we are led to finding a minimum of a real valued function defined on a product Riemannian manifold, e.g., special orthogonal groups and unit sphere. To take advantage of its Riemannian structure, we consider the Newton algorithm on this manifold. In particular, we f... View full abstract»

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  • FPGA implementations of fast Fourier transforms for real-time signal and image processing

    Publication Year: 2005 , Page(s): 283 - 296
    Cited by:  Papers (23)
    Click to expandAbstract | PDF file iconPDF (636 KB)  

    Applications based on the fast Fourier transform (FFT), such as signal and image processing, require high computational power, plus the ability to experiment with algorithms. Reconfigurable hardware devices in the form of field programmable gate arrays (FPGAs) have been proposed as a way of obtaining high performance at an economical price. However, users must program FPGAs at a very low level and... View full abstract»

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  • Nonlinear blind signal separation with intelligent controlled learning

    Publication Year: 2005 , Page(s): 297 - 306
    Cited by:  Papers (2)
    Click to expandAbstract | PDF file iconPDF (1053 KB)  

    The paper proposes a new nonlinear blind source separation algorithm with hybridisation of fuzzy logic based learning rate control and simulated annealing to improve the global solution search. Benefits of fuzzy systems and simulated annealing are incorporated into a multilayer perceptron network. Fuzzy logic control allows adjustments of learning rate to enhance the rate of convergence of the alg... View full abstract»

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  • Aircraft type recognition in satellite images

    Publication Year: 2005 , Page(s): 307 - 315
    Cited by:  Papers (5)
    Click to expandAbstract | PDF file iconPDF (677 KB)  

    This paper proposes a hierarchical classification algorithm to accurately recognise aircraft in satellite images. Before recognition, a novel symmetry-based algorithm is proposed to estimate an aircraft's optimal orientation for rotation correction. Then, distinguishable features are derived from each aircraft for aircraft recognition. However, different features have different discrimination abil... View full abstract»

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  • Editorial: Technologies for interactive multimedia services

    Publication Year: 2005 , Page(s): 316 - 317
    Click to expandAbstract | PDF file iconPDF (66 KB)  

    The last few years have witnessed a significant development in the means to produce and make available multimedia content, namely owing to the democratisation of access to digital picture and video cameras in addition to the generalisation of Internet usage. The trend now is to allow ubiquitous access to this ever-increasing amount of multimedia content, enabling a user to find effectively the des... View full abstract»

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  • Fully automatic face recognition system using a combined audio-visual approach

    Publication Year: 2005 , Page(s): 318 - 326
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (1014 KB)  

    This paper presents a novel audio and video information fusion approach that greatly improves automatic recognition of people in video sequences. To that end, audio and video information is first used independently to obtain confidence values that indicate the likelihood that a specific person appears in a video shot. Finally, a post-classifier is applied to fuse audio and visual confidence values... View full abstract»

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  • Bilinear factorisation for facial expression analysis and synthesis

    Publication Year: 2005 , Page(s): 327 - 333
    Cited by:  Papers (6)
    Click to expandAbstract | PDF file iconPDF (508 KB)  

    The paper addresses the issue of face representations for facial expression recognition and synthesis. In this context, a global active appearance model is used in conjunction with two bilinear factorisation models to separate expression and identity factors from the global appearance parameters. Although active appearance models and bilinear modelling are not new concepts, the paper's main contri... View full abstract»

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  • Mutual feedback scheme for face detection and tracking aimed at density estimation in demonstrations

    Publication Year: 2005 , Page(s): 334 - 346
    Cited by:  Papers (2)
    Click to expandAbstract | PDF file iconPDF (3127 KB)  

    Crowded video sequences, like those of demonstrations, offer an interesting challenge for object detection and tracking owing to their complexity: taken outdoors, often in different illumination conditions; showing faces not in frontal view, with perspective effects, complex background, etc. Tracking of individuals becomes a difficult task due to the high number of occlusions. The paper proposes a... View full abstract»

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  • Partition sampling: an active learning selection strategy for large database annotation

    Publication Year: 2005 , Page(s): 347 - 355
    Cited by:  Patents (1)
    Click to expandAbstract | PDF file iconPDF (686 KB)  

    Annotating a video database requires an intensive, time consuming and error prone human effort. However, this is a mandatory task to efficiently describe multimedia contents and train models for automatic content detection. A new selection strategy for active learning methods to minimise human effort in labelling a large database of video sequences is proposed. Formally, active learning is a proce... View full abstract»

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  • Novel multimedia retrieval technique: progressive query (why wait?)

    Publication Year: 2005 , Page(s): 356 - 366
    Cited by:  Papers (5)
    Click to expandAbstract | PDF file iconPDF (1395 KB)  

    A novel multimedia retrieval technique, called progressive query (PQ) is presented. PQ is designed to bring an effective solution, especially when querying large-scale multimedia databases. In addition, PQ produces intermediate query retrieval results during the execution of the query. The series of intermediate query results finally converges to the full-scale search retrieval in a faster way and... View full abstract»

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  • Fast video shot retrieval based on trace geometry matching

    Publication Year: 2005 , Page(s): 367 - 373
    Cited by:  Papers (4)
    Click to expandAbstract | PDF file iconPDF (373 KB)  

    Content-based video retrieval technology holds the key to the efficient management and sharing of video content from different sources, in different scales, across different platforms, and over different communication channels. In this work, fast video shot retrieval algorithms, based on the geometry of video sequence traces in the principal component space, are presented. Techniques to address sc... View full abstract»

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  • Modality conversion for QoS management in universal multimedia access

    Publication Year: 2005 , Page(s): 374 - 384
    Cited by:  Papers (7)  |  Patents (2)
    Click to expandAbstract | PDF file iconPDF (537 KB)  

    Modality conversion currently emerges as an important issue in universal multimedia access. The decision on modality conversion is affected by various factors, such as terminal capability, user preferences, surrounding environment, etc. Here, modality conversion under the constraint of connection bitrate is considered. Intuitively, when content scaling cannot provide the acceptable QoS, modality c... View full abstract»

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