Title :
Dichromatic color perception in a two stage model: Testing for cone replacement and cone loss models
Author :
Rodriguez-Pardo, Carlos Eduardo ; Sharma, Gaurav
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Rochester, Rochester, NY, USA
Abstract :
We formulate a two stage model of dichromatic color perception that consists of a first sensor layer with gain control followed by an opponent encoding transformation. We propose a method for estimating the unknown parameters in the model by utilizing pre-existing data from psychophysical experiments on unilateral dichromats. The model is validated using this existing data and by using predictions on known test images for detecting dichromacy. Using the model and analysis we evaluate the feasibility of cone loss and cone replacement hypotheses that have previously been proposed for modeling dichromatic color vision. Results indicate that the two stage model offers good agreement with test data. The cone loss and cone replacement models are shown to have fundamental limitations in matching psychophysical observations.
Keywords :
colour vision; physiological models; cone loss; cone replacement; dichromatic color perception; gain control; psychophysics; Dichromacy; color vision models; cone loss hypothesis; cone replacement hypothesis; stage models; unilateral dichromacy;
Conference_Titel :
IVMSP Workshop, 2011 IEEE 10th
Conference_Location :
Ithaca, NY
Print_ISBN :
978-1-4577-1284-5
DOI :
10.1109/IVMSPW.2011.5970347