Bruno G. Breitmeyer and Haluk ÖĞmen
- Published in print:
- 2006
- Published Online:
- April 2010
- ISBN:
- 9780198530671
- eISBN:
- 9780191728204
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780198530671.003.0005
- Subject:
- Psychology, Cognitive Psychology
This chapter discusses the sustained-transient channel approach to visual masking. First, it presents neurophysiological data on primate parvocellular and magnocellular pathways and their cortical ...
More
This chapter discusses the sustained-transient channel approach to visual masking. First, it presents neurophysiological data on primate parvocellular and magnocellular pathways and their cortical targets. Particular attention is given to the differential dynamics of these pathways. Next, deriving from several paradigms, systems-level evidence is presented for the existence of sustained and transient channels in primates, including spatiotemporal contrast sensitivity, visual reaction time, uniform-field flicker masking, and visual pattern masking. Finally, Breitmeyer & Ganz's sustained-transient dual channel model is introduced, followed by the REtino-COrtical Dynamics (RECOD) model. The explanatory scope of the dual-channel RECOD model is discussed by highlighting how it accounts for 32 major aspects of visual masking. The chapter also includes comparisons of these dual-channel models with other models of visual masking.Less
This chapter discusses the sustained-transient channel approach to visual masking. First, it presents neurophysiological data on primate parvocellular and magnocellular pathways and their cortical targets. Particular attention is given to the differential dynamics of these pathways. Next, deriving from several paradigms, systems-level evidence is presented for the existence of sustained and transient channels in primates, including spatiotemporal contrast sensitivity, visual reaction time, uniform-field flicker masking, and visual pattern masking. Finally, Breitmeyer & Ganz's sustained-transient dual channel model is introduced, followed by the REtino-COrtical Dynamics (RECOD) model. The explanatory scope of the dual-channel RECOD model is discussed by highlighting how it accounts for 32 major aspects of visual masking. The chapter also includes comparisons of these dual-channel models with other models of visual masking.
Bruno G. Breitmeyer and Haluk ÖĞmen
- Published in print:
- 2006
- Published Online:
- April 2010
- ISBN:
- 9780198530671
- eISBN:
- 9780191728204
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780198530671.003.0006
- Subject:
- Psychology, Cognitive Psychology
Metacontrast and motion perception have been related to each other in several ways. At a theoretical level, similarities between the temporal dynamics of visual masking and motion perception have ...
More
Metacontrast and motion perception have been related to each other in several ways. At a theoretical level, similarities between the temporal dynamics of visual masking and motion perception have been noted by several investigators. The perceived clarity/blur of moving targets (also known as ‘motion deblurring’) is another phenomenon that reveals a close relationship between metacontrast and motion. The chapter provides a review of basic findings on the motion deblurring, followed by a discussion of mechanisms that can account for this phenomenon. The models discussed include those that rely on motion estimation-compensation mechanisms as well as those that use inhibitory mechanisms. Simulations of the RECOD model pertaining to motion deblurring are also presented.Less
Metacontrast and motion perception have been related to each other in several ways. At a theoretical level, similarities between the temporal dynamics of visual masking and motion perception have been noted by several investigators. The perceived clarity/blur of moving targets (also known as ‘motion deblurring’) is another phenomenon that reveals a close relationship between metacontrast and motion. The chapter provides a review of basic findings on the motion deblurring, followed by a discussion of mechanisms that can account for this phenomenon. The models discussed include those that rely on motion estimation-compensation mechanisms as well as those that use inhibitory mechanisms. Simulations of the RECOD model pertaining to motion deblurring are also presented.
