Dr. Farid Ahmed Profile

Dr. Farid Ahmed

Senior Professional Staff at Johns Hopkins Univ Applied Physics Lab

SPIE Involvement:

Author

Publications (25)

Proceedings Article | 7 May 2012 Paper

From measurements to metrics: PCA-based indicators of cyber anomaly

Farid Ahmed, Tommy Johnson, Sonia Tsui

Proceedings Volume 8408, 840806 (2012) https://doi.org/10.1117/12.918165

KEYWORDS: Principal component analysis, Remote sensing, Binary data, Visualization, Computer intrusion detection, Statistical analysis, Computer security, Data modeling, Modulation, Applied physics

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Proceedings Article | 5 May 2009 Paper

Characterizing cryptographic primitives for lightweight digital image encryption

Farid Ahmed, Cheryl Resch

Proceedings Volume 7351, 73510G (2009) https://doi.org/10.1117/12.817907

KEYWORDS: Image encryption, Diffusion, Computer security, Image compression, Multimedia, Image quality, Multimedia encryption, Signal processing, Image processing, Digital imaging

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SPIE Journal Paper | 1 January 2008

Fingerprint reference verification method using a phase-encoding-based watermarking technique

Farid Ahmed, Marie Selvanadin

JEI, Vol. 17, Issue 01, 011010, (January 2008) https://doi.org/10.1117/12.10.1117/1.2891312

KEYWORDS: Digital watermarking, Phase shift keying, Image segmentation, Quantization, Biometrics, Image quality, Sensors, Fourier transforms, Modulation, Fingerprint recognition

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SPIE Journal Paper | 1 August 2007

Integrated fingerprint verification method using a composite signature-based watermarking technique

Farid Ahmed

OE, Vol. 46, Issue 08, 087005, (August 2007) https://doi.org/10.1117/12.10.1117/1.2771232

KEYWORDS: Digital watermarking, Composites, Biometrics, Databases, Image compression, Sensors, Fourier transforms, Phase only filters, Image sensors, Optical engineering

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Proceedings Article | 5 March 2007 Paper

Characterization of pulmonary nodules on computer tomography (CT) scans: the effect of additive white noise on features selection and classification performance

Teresa Osicka, Matthew Freedman, Farid Ahmed

Proceedings Volume 6512, 651245 (2007) https://doi.org/10.1117/12.709576

KEYWORDS: Wavelets, Lung, Image classification, Computed tomography, Discrete wavelet transforms, Image segmentation, Feature selection, Lung cancer, Feature extraction, Cancer

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Proceedings Article | 17 March 2006 Paper

Characterization of pulmonary nodules features on computer tomography (CT) scans using wavelet coefficients and heat maps

Teresa Osicka, Matthew Freedman, Farid Ahmed

Proceedings Volume 6144, 614463 (2006) https://doi.org/10.1117/12.653198

KEYWORDS: Discrete wavelet transforms, Wavelets, Feature extraction, Computed tomography, Lung, Visualization, Feature selection, Cancer, Lung cancer, Visual analytics

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Proceedings Article | 25 October 2005 Paper

Phase-signature based watermarking for multimedia authentication: analysis and design

Farid Ahmed, Ira Moskowitz

Proceedings Volume 6015, 60150B (2005) https://doi.org/10.1117/12.630073

KEYWORDS: Digital watermarking, Image quality, Phase only filters, Image processing, Multimedia, Image compression, Fourier transforms, Error analysis, Digital imaging, Process modeling

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Proceedings Article | 18 October 2004 Paper

Texture-based steganalysis: results for color images

Patricia Lafferty, Farid Ahmed

Proceedings Volume 5561, (2004) https://doi.org/10.1117/12.559896

KEYWORDS: Steganalysis, Neural networks, Digital watermarking, Statistical analysis, Binary data, Image processing, Algorithm development, Detection and tracking algorithms, Pattern recognition, Steganography

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Proceedings Article | 18 October 2004 Paper

Phase signature-based image authentication watermark robust to compression and coding

Farid Ahmed, Ira Moskowitz

Proceedings Volume 5561, (2004) https://doi.org/10.1117/12.557192

KEYWORDS: Digital watermarking, Image compression, Image quality, Wavelets, Discrete wavelet transforms, Phase only filters, Signal detection, Fourier transforms, Image encryption, Image processing

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SPIE Journal Paper | 1 August 2004

Correlation-based watermarking method for image authentication applications

Farid Ahmed, Ira Moskowitz

OE, Vol. 43, Issue 08, (August 2004) https://doi.org/10.1117/12.10.1117/1.1763589

KEYWORDS: Digital watermarking, Image quality, Image processing, Phase only filters, Fourier transforms, Image compression, Sensors, Digital imaging, Image transmission, Signal processing

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Proceedings Article | 22 September 2003 Paper

Reliable transmission of security-enabled multimedia over the Internet

David Moore, Farid Ahmed

Proceedings Volume 5071, (2003) https://doi.org/10.1117/12.486812

KEYWORDS: Multimedia, Digital watermarking, Computer security, Internet, Reliability, Network security, Information security, Image processing, Receivers, Data hiding

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Proceedings Article | 29 February 2000 Paper

Multiresolutional quality assessment of SAR azimuth sequence using a spatiotemporal analysis technique

Farid Ahmed, Gregory Power, Brian Swahn

Proceedings Volume 3968, (2000) https://doi.org/10.1117/12.378874

KEYWORDS: Synthetic aperture radar, Image quality, Speckle, Aluminum, Wavelets, Image fusion, Image analysis, Image resolution, Reflectivity, Signal to noise ratio

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Proceedings Article | 21 July 1999 Paper

Compressed-domain spatio-temporal metric for change detection in image sequences

Farid Ahmed, Gregory Power

Proceedings Volume 3716, (1999) https://doi.org/10.1117/12.354717

KEYWORDS: Image compression, Wavelets, Tin, Image processing, Video, Digital imaging, Toxic industrial chemicals, Information visualization, Nanoimprint lithography, Ions

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Proceedings Article | 17 May 1999 Paper

Scene-cut detection in image sequences using multiresolutional information features

Farid Ahmed, Gregory Power

Proceedings Volume 3642, (1999) https://doi.org/10.1117/12.348428

KEYWORDS: Wavelets, Image segmentation, Toxic industrial chemicals, Video, Analytical research, Digital imaging, Image fusion, Image resolution, Multimedia, Video processing

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SPIE Journal Paper | 1 April 1999

Velocital information feature for charting spatio-temporal changes in digital image sequences

Gregory Power, Mohammad Karim, Farid Ahmed

JEI, Vol. 8, Issue 02, (April 1999) https://doi.org/10.1117/12.10.1117/1.482695

KEYWORDS: Image quality, Image compression, Digital imaging, Image transmission, Infrared radiation, Infrared imaging, Quantization, Optical flow, Image analysis, Image filtering

SPIE Journal Paper | 1 March 1999

Synthetic correlation-based modified signed-digit trinary logic processing

Farid Ahmed, Abdul Ahad Awwal, Gregory Power

OE, Vol. 38, Issue 03, (March 1999) https://doi.org/10.1117/12.10.1117/1.602121

KEYWORDS: Single mode fibers, Logic, Signal to noise ratio, Fourier transforms, Phase only filters, Optical engineering, Optical correlators, Computer programming, Content addressable memory, Electronic filtering

Proceedings Article | 1 October 1998 Paper

Charting image artifacts in digital image sequences using velocital information content

Gregory Power, Mohammad Karim, Farid Ahmed

Proceedings Volume 3460, (1998) https://doi.org/10.1117/12.323220

KEYWORDS: Image quality, Image transmission, Digital imaging, Image compression, Image analysis, Image processing, Information technology, Optical flow, Analog electronics, Imaging systems

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SPIE Journal Paper | 1 January 1998

Multireference joint transform correlator for distortion estimation

Farid Ahmed, Mohammad Alam, Mohammad Karim

OE, Vol. 37, Issue 01, (January 1998) https://doi.org/10.1117/12.10.1117/1.601853

KEYWORDS: Distortion, Composites, Joint transforms, Optical correlators, Wavelets, Fourier transforms, Superposition, Modulation, Phase only filters, Optical engineering

SPIE Journal Paper | 1 April 1996

Rotation-invariant target recognition using an amplitude-coupled minimum-average correlation-energy filter

Khan Iftekharuddin, Farid Ahmed, Mohammad Karim

OE, Vol. 35, Issue 04, (April 1996) https://doi.org/10.1117/12.10.1117/1.600717

KEYWORDS: Detection and tracking algorithms, Image filtering, Synthetic aperture radar, Optical filters, Target recognition, Phase only filters, Automatic target recognition, Optical correlators, Signal to noise ratio, Composites

Proceedings Article | 15 March 1996 Paper

Voting scheme nonlinearity-based binary composite filter

Farid Ahmed, Mohammad Karim, Fahmida Rahman

Proceedings Volume 2752, (1996) https://doi.org/10.1117/12.235641

KEYWORDS: Composites, Distortion, Spatial light modulators, Signal to noise ratio, Modulation, Image filtering, Detection and tracking algorithms, Optical character recognition, Computer engineering, Electrical engineering

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SPIE Journal Paper | 1 November 1995

Wavelet transform-based correlator for the recognition of rotationally distorted images

Farid Ahmed, Mohammad Karim, Mohammad Alam

OE, Vol. 34, Issue 11, (November 1995) https://doi.org/10.1117/12.10.1117/12.213613

KEYWORDS: Wavelets, Composites, Distortion, Optical correlators, Modulation, Fourier transforms, Joint transforms, Remote sensing, Image filtering, Wavelet transforms

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Proceedings Article | 5 July 1995 Paper

Wavelet feature performance analysis for distortion-invariant target detection

Farid Ahmed, Mohammad Karim

Proceedings Volume 2484, (1995) https://doi.org/10.1117/12.213058

KEYWORDS: Wavelets, Target detection, Statistical analysis, Target recognition, Feature extraction, Electro optical modeling, Wavelet transforms, Fourier transforms, Electrical engineering, Electro optics

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Proceedings Article | 16 June 1995 Paper

Image smoothing with minimal distortion

Steven Gustafson, Vasiliki Nikolaou, Farid Ahmed

Proceedings Volume 2488, (1995) https://doi.org/10.1117/12.211975

KEYWORDS: Distortion, Digital imaging, Image segmentation, Image enhancement, Medical imaging, Convolution, Weapons, Tumors, Image processing, Integration

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Proceedings Article | 28 March 1995 Paper

Rotation invariant detection in a noisy environment using a wavelet-based joint transform correlator

Farid Ahmed, Mohammad Alam, Mohammad Karim

Proceedings Volume 2490, (1995) https://doi.org/10.1117/12.205768

KEYWORDS: Composites, Wavelets, Distortion, Joint transforms, Optical correlators, Image filtering, Image resolution, Modulation, Environmental sensing, Wavelet transforms

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Proceedings Article | 11 March 1993 Paper

Polynomial-neural-network-based mobile robot path planning

C. Chen, Farid Ahmed

Proceedings Volume 1964, (1993) https://doi.org/10.1117/12.141780

KEYWORDS: Mobile robots, Artificial intelligence, Neural networks, Sensors, Evolutionary algorithms, Data analysis, Data modeling, Distance measurement, Error analysis, Computer science

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