I’m doing a gamma correction on my Viewpixx monitor screen using a Minolta CS-100 photometer. I measured the luminance values manually and entered them into the table from the Monitor centre.
Something has changed, because the colours now look different when I run my experiment, however the gamma values in the linearisation table are not 1. The option to click on Gamma Test is greyed out, and when I click on Plot gamma, I get the following error:
/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/monitors/MonitorCenter.py:1013: MatplotlibDeprecationWarning: axes.hold is deprecated. See the API Changes document (http://matplotlib.org/api/api_changes.html) for more details. Traceback (most recent call last): File "/Applications/PsychoPy2.app/Contents/Resources/lib/python2.7/psychopy/monitors/MonitorCenter.py", line 1019, in plotGamma if lumsPre != None: ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
Clearly the calibration has not worked, but I’m not sure why. Does anyone have any suggestions on what I need to do?
Thank you very much,