1 def load_img(filename):
   2     im=Image.open(filename)
   3     return resize(fromstring(im.tostring(),uint8),(im.size[1],im.size[0],3))

   1 from pylab import *
   2 
   3 test=range(1000)
   4 test=sin(test)
   5 
   6 psd(test,NFFT=512,Fs=250,Fc=0,detrend=mlab.detrend_none,window=mlab.window_hanning, noverlap=0)
   7 
   8 show()