Intrinsic two-dimensional features as textons
by , ,
Abstract:
We suggest that intrinsic two-dimensional (i2D) features, computationally defined as the outputs of nonlinear operators that model the activity of end-stopped neurons, play a role in preattentive texture discrimination. We first show that for discriminable textures with identical power spectra the predictions of traditional models depend on the type of nonlinearity and fail for energy measures. We then argue that the concept of intrinsic dimensionality, and the existence of end-stopped neurons, can help us to understand the role of the nonlinearities. Furthermore, we show examples in which models without strong i2D selectivity fail to predict the correct ranking order of perceptual segregation. Our arguments regarding the importance of i2D features resemble the arguments of Julesz and co-workers regarding textons such as terminators and crossings. However, we provide a computational framework that identifies textons with the outputs of nonlinear operators that are selective to i2D features.
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PDF URL: http://dx.doi.org/10.1364/JOSAA.15.001723
Reference:
Intrinsic two-dimensional features as textons (Erhardt Barth, Christoph Zetzsche, Ingo Rentschler), In Journal of the Optical Society of America A, The Optical Society, volume 15, 1998.
Bibtex Entry:
@Article{Barth1998,
  author    = {Erhardt Barth and Christoph Zetzsche and Ingo Rentschler},
  title     = {Intrinsic two-dimensional features as textons},
  journal   = {Journal of the Optical Society of America A},
  year      = {1998},
  volume    = {15},
  number    = {7},
  pages     = {1723},
  month     = {jul},
  abstract  = {We suggest that intrinsic two-dimensional (i2D) features, computationally defined as the outputs of nonlinear operators that model the activity of end-stopped neurons, play a role in preattentive texture discrimination. We first show that for discriminable textures with identical power spectra the predictions of traditional models depend on the type of nonlinearity and fail for energy measures. We then argue that the concept of intrinsic dimensionality, and the existence of end-stopped neurons, can help us to understand the role of the nonlinearities. Furthermore, we show examples in which models without strong i2D selectivity fail to predict the correct ranking order of perceptual segregation. Our arguments regarding the importance of i2D features resemble the arguments of Julesz and co-workers regarding textons such as terminators and crossings. However, we provide a computational framework that identifies textons with the outputs of nonlinear operators that are selective to i2D features.},
  doi       = {10.1364/josaa.15.001723},
  publisher = {The Optical Society},
  url       = {http://dx.doi.org/10.1364/JOSAA.15.001723},
}