3:15 PM - 3:30 PM
[15p-B309-7] Brightness illusions using bacteriorhodopsin-based binary DOG filter
Keywords:bacteriorhodopsin, receptive field, retinal ganglion cells
Retinal ganglion cell's receptive fields have a coaxial-shaped structure formed by the central excitatory and outer inhibitory regions. These regions respond oppositely to light. This shape can be mathematically modeled by a balanced DOG function.
Bacteriorhodopsin (bR) is a photosensitive protein which resembles the visual pigment rhodopsin. BR generates a transient polarity reversal photocurrent only when the light switches on or off.
We fabricate a DOG filter based on bR, which mimics the ganglion cell receptive fields. This filter consists of bR dip-coated thin films and the electrolyte solution that are sandwiched between ITO electrodes. We coat center disk and concentric ring patterns with different thickness of bR films, which correspond to the excitatory and inhibitory regions, on the front and rear ITO plates.
We apply bR-DOG filter to low-level brightness–contrast illusions, Hermann grid, Grating induction and Mach band. These images have been scanned on the bR-DOG filter to verify the occurrence of the illusion similar to vision. BR-DOG filter is useful to constructively understand the visual information processing system.
Bacteriorhodopsin (bR) is a photosensitive protein which resembles the visual pigment rhodopsin. BR generates a transient polarity reversal photocurrent only when the light switches on or off.
We fabricate a DOG filter based on bR, which mimics the ganglion cell receptive fields. This filter consists of bR dip-coated thin films and the electrolyte solution that are sandwiched between ITO electrodes. We coat center disk and concentric ring patterns with different thickness of bR films, which correspond to the excitatory and inhibitory regions, on the front and rear ITO plates.
We apply bR-DOG filter to low-level brightness–contrast illusions, Hermann grid, Grating induction and Mach band. These images have been scanned on the bR-DOG filter to verify the occurrence of the illusion similar to vision. BR-DOG filter is useful to constructively understand the visual information processing system.