June 2004
Volume 4, Issue 8
Vision Sciences Society Annual Meeting Abstract  |   August 2004
The Spatial Standard Observer
Author Affiliations
  • Andrew B. Watson
    NASA Ames Research Center, Moffett Field, CA, USA
Journal of Vision August 2004, Vol.4, 51. doi:https://doi.org/10.1167/4.8.51
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      Andrew B. Watson, Albert J. Ahumada; The Spatial Standard Observer. Journal of Vision 2004;4(8):51. https://doi.org/10.1167/4.8.51.

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      © ARVO (1962-2015); The Authors (2016-present)

  • Supplements

Watson & Ramirez (2000) proposed a standard observer for spatial vision that is intended to extend existing photometric and colorimetric standard observers into the realm of spatial patterns. Given a pair of images, it computes the perceptual distance between them in units of JND. It is designed for applications in which simplicity and standardization, as well as accuracy, are important. Here we report the following updates (1, 2) and enhancements (3, 4) to the original proposal. 1) The models for the oblique effect and the contrast sensitivity function have been amended. 2) New model parameters have been estimated based on the new model and the expanded ModelFest data set (Carney, et al., 2000). 3) A local masking model has been added that is essential when the two images share a common pattern background. 4) Optional extensions of the metric are provided for the color (Wuerger, Watson, & Ahumada, 2002) and time domains.

CarneyT.TylerC. W.WatsonA. B.MakousW.BeutterB.ChenC.-C.(2000). Modelfest: year one results and plans for future years. SPIE Proceedings, 3959, 140–151.

WuergerS.WatsonA.B.AhumadaA.J.Jr.(2002) Toward a standard observer for spatio-chromatic detection. SPIE Proceedings 4662, 159–172.

Watson, A. B., Ahumada, A. J.(2004). The Spatial Standard Observer [Abstract]. Journal of Vision, 4( 8): 51, 51a, http://journalofvision.org/4/8/51/, doi:10.1167/4.8.51. [CrossRef]
 Supported by NASA 131-20-20 and NASA 711-51-12.

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