Now showing items 1-12 of 12

    • Assessment of whole-brain white matter by DTI in autosomal recessive spastic ataxia of charlevoix-saguenay 

      Oguz, K. K.; Haliloglu, G.; Temucin, C.; Gocmen, R.; Has, A. C.; Doerschner, K.; Dolgun, A.; Alikasifoglu, M. (American Society of Neuroradiology, 2013)
      BACKGROUND AND PURPOSE: Extension and characteristics of WM involvement other than the brain stem remain inadequately investigated in ARSACS. The aim of this study was to investigate whole-brain WM alterations in patients ...
    • Detection and localization of specular surfaces using image motion cues 

      Yilmaz, O.; Doerschner, K. (Springer, 2014)
      Successful identification of specularities in an image can be crucial for an artificial vision system when extracting the semantic content of an image or while interacting with the environment. We developed an algorithm ...
    • Differences in illumination estimation in #thedress 

      Toscani, M.; Gegenfurtner, K. R.; Doerschner, K. (Association for Research in Vision and Ophthalmology Inc., 2017)
      We investigated whether people who report different colors for #thedress do so because they have different assumptions about the illumination in #thedress scene. We introduced a spherical illumination probe (Koenderink, ...
    • Effects of surface reflectance and 3D shape on perceived rotation axis 

      Doerschner, K.; Yilmaz, O.; Kucukoglu, G.; Fleming, R. W. (Association for Research in Vision and Ophthalmology, 2013)
      Surface specularity distorts the optic flow generated by a moving object in a way that provides important cues for identifying surface material properties (Doerschner, Fleming et al., 2011). Here we show that specular flow ...
    • Effects of surface reflectance on local second order shape estimation in dynamic scenes 

      Dövencioğlu, D.N.; Wijntjes, M.W.A.; Ben-Shahar O.; Doerschner, K. (Elsevier Ltd, 2015)
      In dynamic scenes, relative motion between the object, the observer, and/or the environment projects as dynamic visual information onto the retina (optic flow) that facilitates 3D shape perception. When the object is ...
    • Estimating the glossiness transfer function induced by illumination change and testing its transitivity 

      Doerschner, K.; Boyacı, Hüseyin; Maloney, Laurence T. (Association for Research in Vision and Ophthalmology, 2010)
      The light reflected from a glossy surface depends on the reflectance properties of that surface as well as the flow of light in the scene, the light field. We asked four observers to compare the glossiness of pairs of ...
    • Human visual cortical responses to specular and matte motion flows 

      Kam, T.-E.; Mannion, D.J.; Lee, S.-W.; Doerschner, K.; Kersten, D.J. (Frontiers Media S. A, 2015)
      Determining the compositional properties of surfaces in the environment is an important visual capacity. One such property is specular reflectance, which encompasses the range from matte to shiny surfaces. Visual estimation ...
    • Perceived glossiness in high dynamic range scenes 

      Doerschner, K.; Maloney,Laurence T.; Boyaci, Hüseyin (Association for Research in Vision and Ophthalmology, 2010)
      We investigated how spatial pattern, background, and dynamic range affect perceived gloss in brightly lit real scenes. Observers viewed spherical objects against uniform backgrounds. There were three possible objects. Two ...
    • Rapid classification of specular and diffuse reflection from image velocities 

      Doerschner, K.; Kersten, D.; Schrater, P. R. (Elsevier BV, 2011-09)
      We propose a method for rapidly classifying surface reflectance directly from the output of spatiotemporal filters applied to an image sequence of rotating objects. Using image data from only a single frame, we compute ...
    • Relative flattening between velvet and matte 3D shapes: Evidence for similar shape-from-shading computations 

      Wijntjes, M. W. A.; Doerschner, K.; Kucukoglu, G.; Pont, S. C. (Association for Research in Vision and Ophthalmology, 2012)
      Among other cues, the visual system uses shading to infer the 3D shape of objects. The shading pattern depends on the illumination and reflectance properties (BRDF). In this study, we compared 3D shape perception between ...
    • Specular motion and 3D shape estimation 

      Dövencioğlu, D. N.; Ben-Shahar, O.; Barla, P.; Doerschner, K. (Association for Research in Vision and Ophthalmology Inc., 2017)
      Dynamic visual information facilitates three-dimensional shape recognition. It is still unclear, however, whether the motion information generated by moving specularities across a surface is congruent to that available ...
    • Visual motion and the perception of surface material 

      Doerschner, K.; Fleming, R. W.; Yilmaz, O.; Schrater, P. R.; Hartung, B.; Kersten, D. (Cell Press, 2011)
      Many critical perceptual judgments, from telling whether fruit is ripe to determining whether the ground is slippery, involve estimating the material properties of surfaces. Very little is known about how the brain recognizes ...