title: Limitations of the Oriented Difference of Gaussian Filter in Special Cases of Brightness Perception Illusions.
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.
authors.affiliation: Machine Intelligence Unit, Indian Statistical Institute, Kolkata ashishbakshi@outlook.com.
authors.forename: Ashish
authors.initials: A
authors.lastname: Bakshi
authors.affiliation: Department of Instrumentation and Electronics Engineering, Jadavpur University, Kolkata.
authors.forename: Sourya
authors.initials: S
authors.lastname: Roy
authors.affiliation: Department of Instrumentation and Electronics Engineering, Jadavpur University, Kolkata.
authors.forename: Arijit
authors.initials: A
authors.lastname: Mallick
authors.forename: Kuntal
authors.initials: K
authors.lastname: Ghosh
mesh_terms: D006801:Humans; D009903:Optical Illusions / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology
keywords: ODOG; brightness illusion; length scale; spatial filtering