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 Alen Docef

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Average citations per article1.18
Citation Count13
Publication count11
Publication years1995-2017
Available for download2
Average downloads per article50.50
Downloads (cumulative)101
Downloads (12 Months)33
Downloads (6 Weeks)11
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1 published by ACM
October 2017 ICCBB 2017: Proceedings of the 2017 International Conference on Computational Biology and Bioinformatics
Publisher: ACM
Citation Count: 0
Downloads (6 Weeks): 8,   Downloads (12 Months): 8,   Downloads (Overall): 8

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In this paper, a method that detects an image-based respiratory signal automatically in Cone Beam Computed Tomography (CBCT) projection datasets is proposed. The proposed Intensity Flow Dimensionality Reduction method (IFDR) uses optical flow tracking to estimate a set of dense intensity flow vectors from every adjacent pair of projections in ...
Keywords: Cone beam Computed Tomography (CBCT), optical flow, Respiratory motion

2 published by ACM
July 2015 ACM Transactions on Intelligent Systems and Technology (TIST) - Regular Papers and Special Section on Intelligent Healthcare Informatics: Volume 6 Issue 4, August 2015
Publisher: ACM
Citation Count: 0
Downloads (6 Weeks): 3,   Downloads (12 Months): 25,   Downloads (Overall): 93

Full text available: PDFPDF
Computer-Aided Detection (CAD) of polyps in Computed Tomographic (CT) colonography is currently very limited since a single database at each hospital/institution doesn't provide sufficient data for training the CAD system's classification algorithm. To address this limitation, we propose to use multiple databases, (e.g., big data studies) to create multiple institution-wide ...
Keywords: Computed tomographic colonography, distributed databases, group learning, kernel feature analysis

August 2010 Signal Processing: Volume 90 Issue 8, August, 2010
Publisher: Elsevier North-Holland, Inc.
Citation Count: 1

A semi-supervised learning method, the on-line accelerated kernel feature analysis (On-line AKFA) is presented. In On-line AKFA, features are extracted while data are being fed to the algorithm in small batches as the algorithm proceeds. The paper compares and contrasts the use of On-line AKFA and Off-line AKFA in CT ...
Keywords: Computed tomographic colonography, Accelerated kernel feature analysis, Extracting features, On-line learning

May 2005 Multimedia Tools and Applications: Volume 26 Issue 1, May 2005
Publisher: Kluwer Academic Publishers
Citation Count: 3

Some of the major objectives of the JPEG 2000 still image coding standard were compression and memory efficiency, lossy to lossless coding, support for continuous-tone to bi-level images, error resilience, and random access to regions of interest. This paper will provide readers with some insight on various features and functionalities ...
Keywords: JPEG-2000, image compression

March 2002 IEEE Transactions on Image Processing: Volume 11 Issue 3, March 2002
Publisher: IEEE Press
Citation Count: 5

The two-dimensional (2-D) discrete cosine transform (DCT) and the subsequent quantization of the transform coefficients are two computationally demanding steps of any DCT-based video encoder. In this paper, we propose an efficient joint implementation of these two steps, where the precision in computing the DCT can be exchanged for a ...

September 2001 IEEE Transactions on Multimedia: Volume 3 Issue 3, September 2001
Publisher: IEEE Press
Citation Count: 1

The rapidly expanding field of multimedia communications has fueled significant research and development work in the area of real-time video encoding. Dedicated hardware solutions have reached maturity and cost-efficient hardware encoders are being developed by several manufacturers. However, software solutions based on a general purpose processor or a programmable digital ...

June 2000 ICASSP '00: Proceedings of the Acoustics, Speech, and Signal Processing, 2000. on IEEE International Conference - Volume 04
Publisher: IEEE Computer Society
Citation Count: 1

In this paper, we propose a flexible framework for DCT-based video encoding that yields very good computation performance tradeoffs. Each of the encoding components features a set of parameters that can be used to control its computational complexity and performance. A sequence of optimum parameter sets have been designed to ...

March 1999 DCC '99: Proceedings of the Conference on Data Compression
Publisher: IEEE Computer Society
Citation Count: 0

This paper presents a motion estimation technique for the coding of video sequences that is based on long term temporal prediction. The motion vector of a moving object is tracked from one frame to another using a projection method. The traced motion vector is used as a starting point for ...

March 1999 ICASSP '99: Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 06
Publisher: IEEE Computer Society
Citation Count: 2

A typical MPEG-2 video encoder requires that DCT and quantization be performed in most cases. In this paper we show how to combine these two steps, reducing substantially the number of computations. The new nonlinear transform is called the quantized discrete cosine transform, or QDCT. We also introduce a new ...

May 1996 ICASSP '96: Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 04
Publisher: IEEE Computer Society
Citation Count: 0

This paper addresses the problem of transmission of real-time cardiology ultrasound video over telephone and ISDN lines. The high compression ratios needed for this application are achieved using a nonlinear model-based decomposition of the ultrasound sequence into structure and text are components. These components are encoded using a three-dimensional subband ...

March 1995 DCC '95: Proceedings of the Conference on Data Compression
Publisher: IEEE Computer Society
Citation Count: 0

This paper describes a very computationally efficient design algorithm for color image coding at low bit rates. The proposed algorithm is based on uniform tree-structured subband decomposition, multistage scalar quantization of the image subbands, and high order entropy coding. The main advantage of the algorithm is that no multiplications are ...
Keywords: image subbands, low bit rates, color images, computationally efficient design algorithm, high order entropy coding, multistage scalar quantization, encoding, computational complexity, decoding, image coding, multiplication-free subband coding, uniform tree-structured subband decomposition

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