Phone: 9351 3321 (Mobile: 0414 198 158)
1996/8 Ph. D. Experimental Psychology,
1993/12 M. A. Experimental Psychology, University of Louisville, Louisville, KY, U.S.A.
1989/6 M. A. Cognitive Psychology,
S. Psychology, Liberal Arts,
2008/2-2010/2 : Post-doctoral research fellow (Surface Perception)
+61 (2) 9306-7259
2004/8-2001/11: Post-doctoral research fellow (Perception of surface material properties)
Dr. Jan J. Koenderink, Helmholtz
Phone: +31 30 253 2808
2001/10-1999/1: Post-doctoral research associate (Color vision)
Dr. Qasim Zaidi, SUNY
Phone: 212 780 5142
1996/5-1994/1: Doctoral dissertation (A motion illusion from 2-D periodic patterns)
Dr. Edward E. Essock, Experimental
1993/12-1991/9: Graduate preceptorship in Experimental Psychology, University of
Louisville, Louisville, KY, U.S.A. Supervised by Dr. Edward E. Essock.
Mathematics: Equivalent to Undergraduate Math B.A. (24 credits)
Calculus I, Calculus II, Calculus III, Linear Algebra, Differential Equation, Probability, Statistics, Functional Analysis.
Computer Science: (15 credits)
Linear System Analysis, Image Processing and Pattern Recognition, Algorithms, Machine Learning, Natural Language Processing, Statistical Mechanics, Social Network Analysis.
Computer programming proficiency:
Real time rendering, ray-tracing and volume rendering in WINDOWS, UNIX and Mac.
Familiarity to Matlab, OPENGL and DIRECT X (in Windows).
Experience in Programming in C/C++, JAVA, Python, Assembler, and Pascal.
Intermediate level of visual perception, which includes color, surface, shape from shading, and 3-D surface texture as well as computational aspects of these areas.
Research projects involved:
Shape from shading: 3-D surface relief of shading images rendered with different types of material surfaces in different light fields.
Illumination direction perception: the estimation of the direction of illumination in images of rotating polyhedral shapes with different surface material types in different light fields.
Surface reflectance perception: influences of the mode of lighting, the level of surface reflectance, the number of polyhedral faces and the regularity of polyhedral shape on the perception of the reflectance in 3-D geometrical shapes.
3-D visual texture: Discrimination of two textures differing in viewing and illumination directions.
Color constancy: the effects of perceptual scission, image junctions, color adaptation and color correlations on color identification. Simulations of natural illuminants, materials, and filters were used in a forced-choice procedure to simultaneously measure thresholds for identifying filters and objects across illuminants, and discrimination thresholds within illuminants.
Illumination color perception: the extraction of the color of spectrally filtered spotlights that are cast on different variegated sets of materials (colors).
Color transparency: color scission refers to the perceptual separation of the colors of the image into the colors of the underlying surface and the color of the overlaying layer. We used filter matching to measure the accuracy of color scission for simulated physical filters and materials.
Sensitization: the effect of flicker background on test increments and decrements as a function of flicker frequency and contrast.
Attention: visual search in conjunction display of color and motion.
Motion perception: motion aperture problem (barber pole effects) in a Gaussian contrast window with a moving 1-D sinusoidal grating pattern.
Visual illusion: a motion illusion (Ouchi illusion) in which a rectangular checkerboard pattern interposed on another checkerboard can appear to twitch, slide, or wiggle when the central patch is orthogonal to its background.
Letter recognition (a computer vision project): recognition of cursive (hand written) numbers based on kinetic motion signals.
Restoration of pictures corrupted by motion blur.
Perception of surface reflectance in images of 3-D geometrical shapes: different material types and light fields
“Cognitive Psychology”, Dept. of Education,
Anderson, B., Khang, B., Kim, J. (2011). Using color to understand perceived lightness. Journal of Vision, 11(13), 1-13, http://www.journalofvision.org/content/11/13/19
Anderson, B., Khang, B. (2010). The role of scission in the perception of color and opacity. Journal of Vision, 10(5), 1-16. http://journalofvision.org/content/10/5/26
Khang, B., Koenderink, J. J., & Kappers, A. M. L. (2007), Shape from shading from images rendered with various surface types and light fields. Perception, 36, 1191-1213
Khang, B., Koenderink, J. J., & Kappers, A. M. L. (2006), Perception of illumination direction in images of 3-D convex objects: Influence of surface materials and light fields. Perception, 35, 625-645.
Khang, B. & Zaidi, Q. (2004). Illuminant color perception of spectrally filtered lights. Journal of vision, 4(9), 680-692, http://journalofvision.org/4/9/2/
Khang, B., Koenderink, J. J., & Kappers, A. M. L. (2003). Perception of surface reflectance of 3-D geometrical shape: influence of the lighting mode. Perception, 32, 1311-1324.
Khang, B. & Zaidi, Q. (2002). Accuracy of color scission for spectral transparencies. Journal of Vision, 2(6), 451-466. http://journalofvision.org/2/6/3/
Khang, B. & Zaidi, Q (2002). Cues and strategies for color constancy: Perceptual scission, image junctions and transformational color matching. Vision Research, 42(2), 211-226.
Robilotto, R., Khang, B. & Zaidi, Q. (2002). Sensory and physical determinants of perceived achromatic transparency. Journal of Vision, 2(5), 388-403. http://journalofvision.org/2/5/3/
Khang, B. & Essock, E. A (2000). Apparent swinging motion from 2-D a sinusoidal pattern. Perception, 29, 453-460.
Khang, B. (1998). Learning and neural network models in cognitive science, Won-Kwang Education, 5, 13-24.
Khang, B. & Essock, E. A. (1997). A motion illusion from 2-D periodic patterns. Perception, 26, 585-597.
Khang, B. & Essock, E. A. (1997). Apparent relative motion from a checkerboard surround. Perception, 26, 831-846.
Essock, EA, McCarley, JS, Sinai, MJ,
Khang, B-G, Lehmkuhle, S, Krebs, WK, and Yu, C. (1997). Extensions of the
sustained-like and transient-like effects. In Basic and Clinical Applications of Vision Science, V.
Lakshminarayanan (Ed.), Kluwer Academic Press,
Khang, B. & Cheong, C. (1988). Visual search in conjunction display of color and motion. Psychological Issues, 3, 17-46.
Khang, B. & Anderson, B. (2009). Color provides leverage to access theories of Lightness. Journal of Vision, 9(8), 348 http://www.journalofvision.org/content/9/8/348
Zaidi, Q., Robilotto, R., Khang, B. (2006). Psychophysics based models for properties of translucent objects. CIE Expert Symposium on Color Appearance.
Khang, B.-G., Koenderink, J. J., & Kappers, A. M. L. (2004). Shape constancy does not hold for images rendered with different types of material surfaces. Journal of Vision, 4(8), 79a http://journalofvision.org/4/8/79
Khang, B., Koenderink, J. J., & Kappers, A. M. L. (2003). Perception of the direction of illumination in shaded images of convex polyhedra. Journal of Vision, 3(9), 293a http://journalofvision.org/3/9/293
Khang, B., Koenderink, J. J., & Kappers, A. M. L. Discrimination of surface reflectance of 3-D shape. Perception (Suppl.), 31, 28. ECVP2002.
Khang, B. & Zaidi, Q. (2002). Illuminant color perception of spectrally filtered spotlights. Journal of Vision, 2(7), 147a, http://journalofvision.org/2/7/147
Khang, B. & Zaidi, Q. (2001). Shifts in inferred colors of transparent layers [Abstract]. Journal of Vision, 1(3), 432a, http://journalofvision.org/1/3/432
Robilotto, R., Khang, B., & Zaidi, Q. (2001). Perceived transparency: Tradeoffs between reflectance and transmittance. Journal of Vision, 1(3), 431a, http://journalofvision.org/1/3/431
Khang, B. & Zaidi, Q. (2000). Tests of color scission by identification of transparent overlays. Investigative Ophthalmology and Visual Science (Suppl.) 41, B628.
Zaidi, Q. & Khang, B. (1999). Measurements of object and illuminant identification. Perception (Suppl.), 28.
Khang, B. & Essock, E. A. (1996). Motion illusion from 2-D periodic pattern. Investigative Ophthalmology and Visual Science (Suppl.), 37, S743.
Khang, B., He, Z., & Essock, E. A. (1995). Illusory motion and depth in the Ouchi pattern. Investigative Ophthalmology and Visual Science (Suppl.), 36, S362.
Khang, B., McCarley, J. C., & Essock, E. A. (1994). Non-rigid motion with a Gaussian window. Investigative Ophthamology and Visual Science (Suppl.), 35, 1272.
Essock, E. A., Khang, B., Yu, C., & McCarley, J. C. (1994). Sensitization by flicker near a test spot. Investigative Ophthalmology and Visual Science (Suppl.), 35, 1370.
Khang, B. (1993). The effect of
proximal flicker on the detection of an increment spot. Unpublished Master's Thesis,
Zaidi, Q. & Khang, B. Cues and
strategies for color constancy. OSA/UCI Color Workshop,
Zaidi, Q. & Khang, B. Functional
benefits of color adaptation. Australian Neuroscience Society, Annual Meeting,
Khang, B. December, 1997. Learning
and neural network models in cognitive science,
Khang, B. October, 1996. A motion
illusion from 2-D periodic patterns. Institute for Behavioral Science,
Dr. Jan J. Koenderink,
Dr. Qasim Zaidi, SUNY
Association for Research in Vision and Ophthalmology
Vision Sciences Society
Dr. Jan J. Koenderink
Department Physics of Man Helmholtz Institute,
Phone: +31 30 253 2808
Fax: +31 30 252 2664
Dr. Qasim Zaidi
SUNY State College of Optometry
33 W. 42nd St.
New York, NY 10036
Phone: 212 780 5142
Fax: 212 780 5009
Dr. Edward A. Essock
Department of Psychological and Brain Sciences
University of Louisville
Louisville, KY 40292