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我正在尝试使用 OceanOptics 光谱仪对我的计算机显示器进行伽玛校正以收集数据，并使用 Pyschopy 的伽玛校正模块来线性化曲线。

该程序似乎可以运行大约 4/5 次，但当我尝试设置 GammaRamp 时偶尔会出现错误。我只是错误可能是什么。使用 ctypes 进行 32-64 位转换是否有问题？这是我得到的错误：

Traceback (most recent call last):
  File "C:\WinPython-64bit-2.7.5.3\python-2.7.5.amd64\Lib\site-packages\aibs\chrisgammatest.py", line 139, in <module>
    Calib=GammaTest()
  File "C:\WinPython-64bit-2.7.5.3\python-2.7.5.amd64\Lib\site-packages\aibs\chrisgammatest.py", line 22, in __init__
    self.monitorcal()
  File "C:\WinPython-64bit-2.7.5.3\python-2.7.5.amd64\Lib\site-packages\aibs\chrisgammatest.py", line 81, in monitorcal
    sample=self.gammaTest()
  File "C:\WinPython-64bit-2.7.5.3\python-2.7.5.amd64\Lib\site-packages\aibs\chrisgammatest.py", line 42, in gammaTest
    window=visual.Window(units='norm',monitor=monitortype, fullscr = True, screen = screennumber, waitBlanking=True)
  File "C:\WinPython-64bit-2.7.5.3\python-2.7.5.amd64\lib\site-packages\psychopy\visual.py", line 334, in __init__
    self.setGamma(self.gamma)#using either pygame or bits++
  File "C:\WinPython-64bit-2.7.5.3\python-2.7.5.amd64\lib\site-packages\psychopy\visual.py", line 935, in setGamma
    self.winHandle.setGamma(self.winHandle, self.gamma)
  File "C:\WinPython-64bit-2.7.5.3\python-2.7.5.amd64\lib\site-packages\psychopy\gamma.py", line 34, in setGamma
    setGammaRamp(pygletWindow, newLUT)
  File "C:\WinPython-64bit-2.7.5.3\python-2.7.5.amd64\lib\site-packages\psychopy\gamma.py", line 51, in setGammaRamp
    success = windll.gdi32.SetDeviceGammaRamp(pygletWindow._dc, newRamp.ctypes)
ctypes.ArgumentError: argument 1: <type 'exceptions.OverflowError'>: long int too long to convert
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1 回答 1

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ctypes / Pyglet / Psychopy 中的 GetDC() 似乎存在 32/64 符号扩展问题。

见： https ://github.com/psychopy/psychopy/issues/504

Windows似乎也不允许所有伽玛设置，请参阅：http: //jonls.dk/2010/09/windows-gamma-adjustments/

于 2014-01-22T22:33:21.497 回答