Related Experiment Video
Updated: Mar 30, 2026

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions
Published on: May 2, 2019
Limitations of the Oriented Difference of Gaussian Filter in Special Cases of Brightness Perception Illusions
Ashish Bakshi1, Sourya Roy2, Arijit Mallick2
1Machine Intelligence Unit, Indian Statistical Institute, Kolkata ashishbakshi@outlook.com.
Abstract:
The Oriented Difference of Gaussian (ODOG) filter of Blakeslee and McCourt has been successfully employed to explain several brightness perception illusions which include illusions of both brightness-contrast type, for example, Simultaneous Brightness Contrast and Grating Induction and the brightness-assimilation type, for example, the White effect and the shifted White effect. Here, we demonstrate some limitations of the ODOG filter in predicting perceived brightness by comparing the ODOG responses to various stimuli (generated by varying two parameters, namely, test patch length and spatial frequency) with experimental observations of the same.
Related Concept Videos
Difference from Background: Limit of Detection
The LOD indicates the presence or absence...
Photoreceptors and Visual Pathways
Perceptual Constancy
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Anatomy of the Eyeball
Gestalt Principles of Perception
Color Vision

