Dr. Albert J. Ahumada Profile

Dr. Albert J. Ahumada

Research Psychologist at NASA Ames Research Ctr

SPIE Involvement:

Author

Publications (27)

Proceedings Article | 14 March 2013 Paper

Visible contrast energy metrics for detection and discrimination

Albert Ahumada, Andrew Watson

Proc. SPIE. 8651, Human Vision and Electronic Imaging XVIII

KEYWORDS: Target detection, Optical filters, MATLAB, Data modeling, Spatial frequencies, Interference (communication), Image filtering, Contrast sensitivity, Signal detection, Performance modeling

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Proceedings Article | 10 February 2009 Paper

The dynamic range of visual imagery in space

Albert Ahumada, Mary Kaiser, Jeffrey Mulligan

Proc. SPIE. 7240, Human Vision and Electronic Imaging XIV

KEYWORDS: Visible radiation, Eye, Sun, Stars, Visualization, Cameras, Image processing, Visual system, High dynamic range imaging, Earth's atmosphere

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Proceedings Article | 9 February 2006 Paper

Symbol discriminability models for improved flight displays

Albert Ahumada, Maite Trujillo San-Martin, Jennifer Gille

Proc. SPIE. 6057, Human Vision and Electronic Imaging XI

KEYWORDS: Displays, Diamond, Visual process modeling, Data modeling, Computational modeling, Calibration, Image resolution, Feature extraction, Performance modeling, RGB color model

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Proceedings Article | 17 June 2003 Paper

Contrast measures for predicting text readability

Lauren Scharff, Albert Ahumada

Proc. SPIE. 5007, Human Vision and Electronic Imaging VIII

KEYWORDS: Transparency, Visualization, Calibration, Error analysis, LCDs, Human vision and color perception, Psychology, Virtual reality, Electronic imaging, Heads up displays

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Proceedings Article | 30 May 2002 Paper

Towards a spatio-chromatic standard observer for detection

Sophie Wuerger, Andrew Watson, Albert Ahumada

Proc. SPIE. 4662, Human Vision and Electronic Imaging VII

KEYWORDS: Visual process modeling, Data modeling, Modulation, Visualization, Spatial frequencies, Databases, Colorimetry, Distance measurement, Human vision and color perception, Contrast sensitivity

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Proceedings Article | 8 June 2001 Paper

Masking in color images

Albert Ahumada, William Krebs

Proc. SPIE. 4299, Human Vision and Electronic Imaging VI

KEYWORDS: Target detection, Visual process modeling, Data modeling, Spatial frequencies, Error analysis, Linear filtering, Image filtering, Contrast sensitivity, Color vision, RGB color model

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Proceedings Article | 2 June 2000 Paper

Detection of distortion in small moving images compared to the predictions of spatial-temporal model

Kjell Brunnstroem, Bo Schenkman, Albert Ahumada

Proc. SPIE. 3959, Human Vision and Electronic Imaging V

KEYWORDS: Internet, Image compression, Visual process modeling, Visualization, Image processing, Video, Distortion, Image quality, Video compression, Performance modeling

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Proceedings Article | 19 May 1999 Paper

Discriminability measures for predicting readability

Lauren Scharff, Albert Ahumada, Alyson Hill

Proc. SPIE. 3644, Human Vision and Electronic Imaging IV

KEYWORDS: Target detection, Image compression, Visual process modeling, Visualization, Spatial frequencies, Image quality, Image filtering, Contrast sensitivity, Visibility, RGB color model

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Proceedings Article | 19 May 1999 Paper

Nonlinear features in vernier acuity

Erhardt Barth, Bettina Beard, Albert Ahumada

Proc. SPIE. 3644, Human Vision and Electronic Imaging IV

KEYWORDS: Mathematical modeling, Visual process modeling, Data modeling, Spatial filters, Silicon, Gaussian filters, Nonlinear optics, Image filtering, Image classification, Convolution

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Proceedings Article | 19 May 1999 Paper

Spatio-temporal discrimination model predicting IR target detection

Kjell Brunnstroem, Robert Eriksson, Albert Ahumada

Proc. SPIE. 3644, Human Vision and Electronic Imaging IV

KEYWORDS: Target detection, Infrared detectors, Infrared imaging, Visual process modeling, Data modeling, Visualization, Image processing, Surveillance, Infrared radiation, Eye models

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Proceedings Article | 6 October 1998 Paper

Predictive optical-flow algorithm for aircraft detection

Jeffrey McCandless, Albert Ahumada

Proc. SPIE. 3522, Intelligent Robots and Computer Vision XVII: Algorithms, Techniques, and Active Vision

KEYWORDS: Target detection, Nose, Detection and tracking algorithms, Cameras, Video, Optical testing, Computer vision technology, Machine vision, Optical flow, Algorithm development

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Proceedings Article | 17 July 1998 Paper

Spatiotemporal discrimination model predicts temporal masking functions

Albert Ahumada, Bettina Beard, Robert Eriksson

Proc. SPIE. 3299, Human Vision and Electronic Imaging III

KEYWORDS: Optical filters, Visual process modeling, Spatial frequencies, Calibration, Image processing, Control systems, Linear filtering, Image filtering, Visual system, Contrast sensitivity

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Proceedings Article | 17 July 1998 Paper

Technique to extract relevant image features for visual tasks

Bettina Beard, Albert Ahumada

Proc. SPIE. 3299, Human Vision and Electronic Imaging III

KEYWORDS: Image visualization, Visual process modeling, Visualization, Pattern recognition, Silicon, Feature extraction, Image filtering, Image classification, Sensory processes, Human vision research

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Proceedings Article | 3 June 1997 Paper

Image discrimination models: detection in fixed and random noise

Albert Ahumada, Bettina Beard

Proc. SPIE. 3016, Human Vision and Electronic Imaging II

KEYWORDS: Target detection, Statistical analysis, Visual process modeling, Signal attenuation, Interference (communication), Visual system, Signal detection, Eye models, Systems modeling, Visibility

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Proceedings Article | 3 June 1997 Paper

Image discrimination models predict signal detection in natural medical image backgrounds

Miguel Eckstein, Albert Ahumada, Andrew Watson

Proc. SPIE. 3016, Human Vision and Electronic Imaging II

KEYWORDS: Spatial frequencies, X-rays, Interference (communication), Medical imaging, Image filtering, Angiography, X-ray imaging, Signal detection, Statistical modeling, Performance modeling

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Proceedings Article | 16 April 1997 Paper

What is degrading human visual detection peformance in natural medical image backgrounds?

Miguel Eckstein, Albert Ahumada, Andrew Watson, James Whiting

Proc. SPIE. 3036, Medical Imaging 1997: Image Perception

KEYWORDS: Visual process modeling, Data modeling, Visualization, Image processing, Interference (communication), Medical imaging, Image quality, Signal detection, Statistical modeling, Performance modeling

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Proceedings Article | 22 April 1996 Paper

Object detection in a noisy scene

Albert Ahumada, Bettina Beard

Proc. SPIE. 2657, Human Vision and Electronic Imaging

KEYWORDS: Target detection, Visual process modeling, Visualization, Spatial frequencies, Error analysis, Interference (communication), Digital imaging, Image filtering, Performance modeling, Visibility

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Proceedings Article | 21 April 1995 Paper

Fast DCT block smoothing algorithm

Rensheng Horng, Albert Ahumada

Proc. SPIE. 2501, Visual Communications and Image Processing '95

KEYWORDS: Image compression, Data modeling, Optical coherence tomography, Error analysis, Image restoration, Image quality, Signal processing, Quantization, Smoothing, Algorithm development

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Proceedings Article | 20 April 1995 Paper

Models of human image discrimination predict object detection in natural backgrounds

Albert Ahumada, Andrew Watson, Ann Rohaly

Proc. SPIE. 2411, Human Vision, Visual Processing, and Digital Display VI

KEYWORDS: Target detection, Data modeling, Digital filtering, Medical imaging, Image quality, Digital imaging, Image filtering, Analytical research, Target recognition, Contrast sensitivity

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Proceedings Article | 1 May 1994 Paper

Deblocking DCT compressed images

Albert Ahumada, Rensheng Horng

Proc. SPIE. 2179, Human Vision, Visual Processing, and Digital Display V

KEYWORDS: Image compression, Spatial frequencies, Error analysis, Computer programming, Image analysis, Transform theory, Image quality, Quantization, Visual system, Algorithm development

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Proceedings Article | 1 May 1994 Paper

Discrete cosine transform (DCT) basis function visibility: effects of viewing distance and contrast masking

Andrew Watson, Joshua Solomon, Albert Ahumada, Alan Gale

Proc. SPIE. 2179, Human Vision, Visual Processing, and Digital Display V

KEYWORDS: Image compression, Visual process modeling, Data modeling, Visualization, Matrices, Image resolution, Quantization, Optical resolution, Contrast sensitivity, Visibility

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Proceedings Article | 8 September 1993 Paper

Improved detection model for DCT coefficient quantization

Heidi Peterson, Albert Ahumada, Andrew Watson

Proc. SPIE. 1913, Human Vision, Visual Processing, and Digital Display IV

KEYWORDS: Image compression, Data modeling, Spatial frequencies, Matrices, Chromium, Colorimetry, Quantization, Neon, Visibility, RGB color model

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Proceedings Article | 27 August 1992 Paper

Color matrix display simulation based on luminance and chromatic contrast sensitivity of early vision

Russel Martin, Albert Ahumada, James Larimer

Proc. SPIE. 1666, Human Vision, Visual Processing, and Digital Display III

KEYWORDS: Mathematical modeling, Image visualization, Visual process modeling, Visualization, Spatial frequencies, Image processing, Colorimetry, Signal processing, Contrast sensitivity, CRTs

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Proceedings Article | 27 August 1992 Paper

Luminance-model-based DCT quantization for color image compression

Albert Ahumada, Heidi Peterson

Proc. SPIE. 1666, Human Vision, Visual Processing, and Digital Display III

KEYWORDS: Image compression, Visual process modeling, Data modeling, Visualization, Spatial frequencies, Matrices, Quantization, Human vision and color perception, Neon, Visibility

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Proceedings Article | 27 August 1992 Paper

Principled halftoning based on human vision models

Jeffrey Mulligan, Albert Ahumada

Proc. SPIE. 1666, Human Vision, Visual Processing, and Digital Display III

KEYWORDS: Visual process modeling, Visualization, Image processing, Diffusion, Quality measurement, Image quality, Quantization, Image filtering, Human vision and color perception, Halftones

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Proceedings Article | 1 June 1991 Paper

Network compensation for missing sensors

Albert Ahumada, Jeffrey Mulligan

Proc. SPIE. 1453, Human Vision, Visual Processing, and Digital Display II

KEYWORDS: Visual process modeling, Visualization, Spatial frequencies, Sensors, Calibration, Image processing, Linear filtering, Image filtering, Human vision and color perception, Algorithm development

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Proceedings Article | 1 October 1990 Paper

Learning receptor positions from imperfectly known motions

Albert Ahumada, Jeffrey Mulligan

Proc. SPIE. 1249, Human Vision and Electronic Imaging: Models, Methods, and Applications

KEYWORDS: Statistical analysis, Visual process modeling, Sensors, Calibration, Error analysis, Solids, Visual system, Human vision and color perception, Receptors, Electronic imaging

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