Date of Award
Fall 2004
Project Type
Dissertation
Program or Major
Psychology
Degree Name
Doctor of Philosophy
First Advisor
Bill Stine
Abstract
In Experiment 1 we measured contrast disparity thresholds for the perception of slant in the venetian blind effect for a square-wave carrier spatial frequency of 3.14 c/deg and square-wave modulation spatial frequencies of 0.26, 0.39, 0.79, and 1.57 c/deg.
In Experiment 2 we increased the spatial frequencies. We measured contrast disparity thresholds for the perception of slant for a square-wave carrier spatial frequency of 5.24 c/deg and square-wave modulation spatial frequencies of 0.33, 0.65, 1.31, and 2.62 c/deg.
In Experiment 3 we returned to the spatial frequencies of Experiment 1 but used sine-wave modulation. We measured contrast disparity thresholds for the perception of slant for a square-wave carrier spatial frequency of 3.14 c/deg and sine-wave modulation spatial frequencies of 0.26, 0.39, 0.79, and 1.57 c/deg.
Fourier analyses were performed on the luminance differences of left and right half-images at threshold, and adjusted for the contrast sensitivity function. Sum and difference spikes, caused by phase changes between the half-images, appeared in the resulting Fourier plots. One parameter, two parameter, and three parameter models were generated to fit the Fourier results. The models predicted thresholds moderately well for two out of three subjects (ETF, JMS) but performed poorly in predicting thresholds for the remaining subject (WWS). A systematic feature of the remaining errors is noted and some future directions in venetian blind research are discussed.
Recommended Citation
Filley, Eugene T., "The Venetian blind effect: Contrast disparity modulation in irradiation stereoscopy" (2004). Doctoral Dissertations. 227.
https://scholars.unh.edu/dissertation/227