A program for controlling an external projector during psychophysical experiments with SLO imaging.

• ``` save current set of parameters. this will overwrite the parameter file associated with the active subject.
• escape quit the program and save the last set of parameters.

• 1 turn on/off grid lines
• 2 turn on/off background square. this square is typically used as a bleaching field or background and overlaid on the SLO raster.
• 5 turn on/off a second square. this square is used for color matching experiments.
• 0 turn on/off a fundus image. this switch requires a file to be loaded in the parameters gui.
• \\ turn pins on/off.

• w, a, s, z move the fixation dot.
• t, f, g, v move the background or matching square (if the later is active).
• u, h, j, n change the size of the background and matching squares.
• p, ;, ', . move the fundus image.
• -, = scale the fundus image.
• [, ] rotate the fundus image.

• tab activate the next mouse.
• left click move the fixation cross hair to the selected location.
• right click drop a pin at the selected location.

• tab + right click drops a pin.
• backspace or delete removes the last pin.
• \ hides or shows pin locations.

• enter, shift increase and decrease the background or matching square.
• arrow keys change the chromaticity of the background or matching square.

• control toggle between large and fine steps across all of the scaling/movement keys.

Load a fundus image, scale it properly and then select regions of interest to image.

Run calibrate_raster_pix_deg.m