Texture processing model visualizes perception of Pinna-Gregory illusion

Gregory on the sun illusion.

Effects of local and global factors in the Pinna illusion

The Pinna illusion (Pinna & Brelstaff, 2000) consists of two concentric rings of micropatterns that appear to counter-rotate when the observer moves towards the stimulus. There have been several reports that the illusion is stronger when the retinal expansion is produced by observer self-motion than when produced on a computer screen without observer self-motion. In fact, we found that the illu...

Independent processing of form, colour, and texture in object perception.

Most investigations of object recognition have focused on the form rather than the material properties of objects. Nevertheless, knowledge of the material properties of an object (via its surface cues) can provide important information about that object's identity. In this study, we used Garner's speeded-classification task to explore whether or not the processing of form and the processing of ...

Path perception and Filehne illusion compared: model and data

Pursuit eye movements introduce retinal motion that complicates the recovery of self-motion from retinal flow. An extra-retinal, eye-velocity signal could be used to aid estimation of the observer's path, perhaps by converting retino-centric into head-centric motion. This conversion is apparently not precise because we often misperceive head-centric object velocity: in the Filehne illusion, for...

Invariant texture perception is harder with synthetic textures: Implications for models of texture processing

Texture synthesis models have become a popular tool for studying the representations supporting texture processing in human vision. In particular, the summary statistics implemented in the Portilla-Simoncelli (P-S) model support high-quality synthesis of natural textures, account for performance in crowding and search tasks, and may account for the response properties of V2 neurons. We chose to...