| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1. The contrast thresholds of a variety of grating patterns have been measured over a wide range of spatial frequencies.
2. Contrast thresholds for the detection of gratings whose luminance profiles are sine, square, rectangular or saw-tooth waves can be simply related using Fourier theory.
3. Over a wide range of spatial frequencies the contrast threshold of a grating is determined only by the amplitude of the fundamental Fourier component of its wave form.
4. Gratings of complex wave form cannot be distinguished from sine-wave gratings until their contrast has been raised to a level at which the higher harmonic components reach their independent threshold.
5. These findings can be explained by the existence within the nervous system of linearly operating independent mechanisms selectively sensitive to limited ranges of spatial frequencies.
This article has been cited by other articles:
|
|
 |
|
  C. V. Hutchinson and T. Ledgeway Asymmetric Spatial Frequency Tuning of Motion Mechanisms in Human Vision Revealed by Masking Invest. Ophthalmol. Vis. Sci., August 1, 2007; 48(8): 3897 - 3904. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. G. Knyazeva, E. Fornari, R. Meuli, and P. Maeder Interhemispheric Integration at Different Spatial Scales: The Evidence From EEG Coherence and fMRI J Neurophysiol, July 1, 2006; 96(1): 259 - 275. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. R. Patching and T. R. Jordan Spatial Frequency Sensitivity Differences between Adults of Good and Poor Reading Ability Invest. Ophthalmol. Vis. Sci., June 1, 2005; 46(6): 2219 - 2224. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Arditi Improving the Design of the Letter Contrast Sensitivity Test Invest. Ophthalmol. Vis. Sci., June 1, 2005; 46(6): 2225 - 2229. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 L. Sirovich and R. Uglesich The organization of orientation and spatial frequency in primary visual cortex PNAS, November 30, 2004; 101(48): 16941 - 16946. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Solessio, D. Scheraga, G. A. Engbretson, B. E. Knox, and R. B. Barlow Circadian Modulation of Temporal Properties of the Rod Pathway in Larval Xenopus J Neurophysiol, November 1, 2004; 92(5): 2672 - 2684. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. S. Banks, S. Gepshtein, and M. S. Landy Why Is Spatial Stereoresolution So Low? J. Neurosci., March 3, 2004; 24(9): 2077 - 2089. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. M. Boynton and E. M. Finney Orientation-Specific Adaptation in Human Visual Cortex J. Neurosci., September 24, 2003; 23(25): 8781 - 8787. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Smith, W. Bair, and J. A. Movshon Signals in Macaque Striate Cortical Neurons that Support the Perception of Glass Patterns J. Neurosci., September 15, 2002; 22(18): 8334 - 8345. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. Regan A Hypothesis-Based Approach to Clinical Psychophysics and to the Design of Visual Tests : The Proctor Lecture Invest. Ophthalmol. Vis. Sci., May 1, 2002; 43(5): 1311 - 1323. [Full Text] [PDF]
|
|
|
|
|
|
A. J. Anderson and C. A. Johnson Mechanisms Isolated by Frequency-Doubling Technology Perimetry Invest. Ophthalmol. Vis. Sci., February 1, 2002; 43(2): 398 - 401. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. G. Goodyear, D. A. Nicolle, G. K. Humphrey, and R. S. Menon BOLD fMRI Response of Early Visual Areas to Perceived Contrast in Human Amblyopia J Neurophysiol, October 1, 2000; 84(4): 1907 - 1913. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. M. Balboa and N. M. Grzywacz The Minimal Local-Asperity Hypothesis of Early Retinal Lateral Inhibition Neural Comput., July 1, 2000; 12(7): 1485 - 1517. [Abstract] [Full Text]
|
|
|
|
|
|
A. Anzai, I. Ohzawa, and R. D. Freeman Neural Mechanisms for Encoding Binocular Disparity: Receptive Field Position Versus Phase J Neurophysiol, August 1, 1999; 82(2): 874 - 890. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. M. Everson, A. K. Prashanth, M. Gabbay, B. W. Knight, L. Sirovich, and E. Kaplan Representation of spatial frequency and orientation in the visual cortex PNAS, July 7, 1998; 95(14): 8334 - 8338. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Y. Adini, D. Sagi, and M. Tsodyks Excitatory-inhibitory network in the visual cortex: Psychophysical evidence PNAS, September 16, 1997; 94(19): 10426 - 10431. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 H. Davis, R. McGregor, C. Pastore, and N. Timble Human Perception and Fabric Streakiness Textile Research Journal, August 1, 1996; 66(8): 533 - 544. [Abstract] [PDF]
|
|
|
|
|
|
R. Mcgregor, D. H. Mershon, and C. M. Pastore Perception, Detection, and Diagnosis of Appearance Defects in Fabrics Textile Research Journal, October 1, 1994; 64(10): 584 - 591. [Abstract] [PDF]
|
|
|
|
 |
|
 N. Nameda Modeling effect of shading: New approach Lighting Research and Technology, January 1, 1990; 22(2): 95 - 101. [Abstract] [PDF]
|
|
|
|
|
|
M.J. Perry Fundamental vision: A glaring case Lighting Research and Technology, January 1, 1988; 20(4): 161 - 165. [Abstract] [PDF]
|
|
|
|
|
|
B.L. Hills Visibility under night driving conditions: Part 1. Laboratory background and theoretical considerations Lighting Research and Technology, January 1, 1975; 7(3): 179 - 184. [Abstract] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
