ir108_temp

def ir108_temp(self):
    """Make a black and white image of the IR 10.8um channel, with
    information to retreive the brightnesse temperature.
    """
    self.check_channels(10.8)

    img = geo_image.GeoImage(self[10.8].data,
                             self.area,
                             self.time_slot,
                             fill_value=0,
                             mode="L")
    img.crude_stretch(0)
    offset = self[10.8].data.max()
    scale = (self[10.8].data.min() - self[10.8].data.max()) / 255.0
    img.invert()

    tags = {"scale": str(scale), "offset": str(offset)}
    img.tags.update(tags)

    return img

ir108_temp.prerequisites = set([10.8])