A program for making color matches in an Oz vision display.

colorMatch depends on Psychopy to generate stimuli, PySimpleGUI27 for the parameters gui, inputs for collecting user responses and Numpy for mathematical computing. To install the dependencies, use:

pip install --user Psychopy PySimpleGUI27 inputs numpy

To install the program:

git clone https://github.com/bps10/colorMatch

From outside of the colorMatch directory run:

python colorMatch

A parameter gui will ask for information about the subject and experimental parameters. When

Note: If using a Windows 10 machine, make sure that Game Bar is disabled. To disable: settings > gaming > gamebar

The colorMatch program creates a fixation dot and two background fields. One is superimposed over the AO imaging / leak raster, the second is for matching.

1. Set the position of the fixation relative to the imaging raster.
2. Center the AO background.
3. Adjust the size of the AO background to perfectly fill the imaging raster.
4. Adjust the hue, saturation and brightness of the fellow field.
5. Make color matches.

Color matches can be practiced in "offline" mode. In this configuration, two test and reference squares are displayed. After each match, each square is randomly updated with a new color. The subject's task is to adjust the test square until it matches the reference. This mode is intended for practice and baseline measurements. Offline mode can be selected with the radio button in the configuration gui that begins each session.

Monitor calibration should be done with a spectraradiometer, such as the PR-650.

• Bits#: A stimulus processor from Cambridge Research Systems. Bits# is basically a graphics card designed for vision science experiments. It provides display calibration solutions, precise timing and increase color bit depth (up to 14 bit per channel). Bits# is not necessary to run the program.

• Logitech F310 gamepad for user responses. This is optional. The keyboard works just fine as well.

• TI lightcrafter is the display currently used in the Roorda Lab. Any color display will run with this program.