+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Detection and discrimination of texture modulations defined by orientation, spatial frequency, and contrast



Detection and discrimination of texture modulations defined by orientation, spatial frequency, and contrast



Journal of the Optical Society of America. A, Optics, Image Science, and Vision 20(3): 401-410



We sought to determine whether the detection and the identification of texture modulations are mediated by a common mechanism. On each trial two textures were presented, one of which contained a modulation in orientation (OM), spatial frequency (FM), or contrast (CM). Observers were required to indicate whether the modulated texture was presented in the first or the second interval as well as the nature of the texture modulation. The results showed that for two of the three pairwise matchings (OM-FM and OM-CM) detection and identification performance were nearly identical, suggesting a common underlying mechanism. However, when FM and CM textures were paired, discrimination thresholds were significantly higher than detection thresholds. In the context of the filter-rectify-filter model of texture perception, our results suggest that the mechanisms underlying detection are labeled with respect to their first-order input; i.e., the identities of these mechanisms are available to higher levels of processing. Several possible explanations for the misidentification of FM and CM at detection threshold are considered.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 048743604

Download citation: RISBibTeXText

PMID: 12630826

DOI: 10.1364/josaa.20.000401


Related references

Spatial frequency discrimination and detection characteristics for gratings defined by orientation texture. Vision Research 38(17): 2601-2617, Sept, 1998

Contrast discrimination cannot explain spatial frequency orientation or temporal frequency discrimination. Vision Research 30(3): 449-462, 1990

Orientation discrimination for coloured stimuli as a function of spatial frequency and contrast. Investigative Ophthalmology & Visual Science 36(4): S464, 1995

Orientation discrimination and aspect ratio discrimination for texture-defined form. Investigative Ophthalmology & Visual Science 37(3): S293, 1996

Orientation discrimination for bars defined by orientation texture. Perception 24(10): 1131-1138, 1995

Discrimination of complex patterns: orientation information is integrated across spatial scale; spatial-frequency and contrast information are not. Perception 26(9): 1101-1120, 1997

The effects of contrast on visual orientation and spatial frequency discrimination: a comparison of single cells and behavior. Journal of Neurophysiology 57(3): 773-786, 1987

Shape and orientation discrimination for motion defined and contrast defined objects temporal integration. Investigative Ophthalmology & Visual Science 31(4 ABSTR ISSUE): 524, 1990

Spatiotemporal interactions in detection of texture orientation modulations. Vision Research 42(26): 2829-2841, 2002

Discrimination of orientation-defined texture edges. Vision Research. 35(20): 2863-2877, 1995

Dot lifetime and presentation duration have little effect on orientation discrimination for equally detectable motion defined and contrast defined bars. Investigative Ophthalmology & Visual Science 32(4): 127, 1991

Modeling the discrimination of orientation-defined texture edges. Investigative Ophthalmology & Visual Science 35(4): 1667, 1994

Two-dimensional aspect ratio discrimination for shape defined by orientation texture. Vision Research 36(22): 3695-3702, 1996

Energy model for contrast detection: Spatial-frequency and orientation selectivity in grating summation. Vision Research 41(12): 1547-1560, 2001

Contrast amplification in global texture orientation discrimination. Journal of Vision 7(10): 13.1-1319, 2007