'interpolation and cmap default to their rc settings
cmap is a colors.Colormap instance
norm is a colors.Normalize instance to map luminance to 0-1
extent is data axes (left, right, bottom, top) for making image plots
registered with data plots.  Default is to label the pixel
centers with the zero-based row and column indices.
Additional kwargs are matplotlib.artist properties'

def __init__(self, ax, cmap=None, norm=None, interpolation=None, origin=None, extent=None, filternorm=1, filterrad=4.0, resample=False, **kwargs):

    self._extent = extent
    super(AxesImage, self).__init__(ax, cmap=cmap, norm=norm, interpolation=interpolation, origin=origin, filternorm=filternorm, filterrad=filterrad, resample=resample, **kwargs)
