Relative position resolution stimuli

ISETBIO includes methods for creating a number of standard psychophysical scenes. By psychophysical scenes we mean images that are displayed on a calibrated display. This project analyzes the information available for relative position judgments (Vernier acuity) in the cone responses. Hence, we relied on the scene creation function

 scene = sceneCreate('vernier', type ,vernierParameterStructure);

The Vernier stimulus control parameters are described in the routine sceneVernier (doc sceneVernier). The parameters include specification of the calibrated display, the color of the line and the background, the line length, and the offset of the two lines in the Vernier target.

This function is called from the vernier acuity stimulus function which produces matched pairs of aligned and offset vernier targets with a range of specific parameters, vaStimuli(parameters).