def load_nddata(self, nddata):
"""
Load an ``NDData`` object into the viewer.
.. todo:: Add flag/masking support, etc.
Parameters
----------
nddata : `~astropy.nddata.NDData`
``NDData`` with image data and WCS.
"""
from ginga.util.wcsmod.wcs_astropy import AstropyWCS
image = AstroImage(logger=self.logger)
image.set_data(nddata.data)
_wcs = AstropyWCS(self.logger)
if nddata.wcs:
_wcs.load_header(nddata.wcs.to_header())
try:
image.set_wcs(_wcs)
except Exception as e:
print('Unable to set WCS from NDData: {}'.format(str(e)))
self._viewer.set_image(image)
def _mtv(self, image, mask=None, wcs=None, title=""):
"""Display an Image and/or Mask on a ginga display"""
self._erase()
self._canvas.delete_all_objects()
Aimage = AstroImage(inherit_primary_header=True)
Aimage.set_data(image.getArray())
self._gingaViewer.set_image(Aimage)
if wcs is not None:
_wcs = AstropyWCS(self.logger)
Aimage.lsst_wcs = WcsAdaptorForGinga(wcs)
_wcs.pixtoradec = Aimage.lsst_wcs.pixtoradec
_wcs.pixtosystem = Aimage.lsst_wcs.pixtosystem
_wcs.radectopix = Aimage.lsst_wcs.radectopix
Aimage.set_wcs(_wcs)
Aimage.wcs.wcs = Aimage.lsst_wcs
if mask:
maskColorFromName = {
'BAD': 'red',
'SAT': 'green',
'INTRP': 'green',
'CR': 'magenta',
'EDGE': 'yellow',
'DETECTED': 'blue',
'DETECTED_NEGATIVE': 'cyan',
'SUSPECT': 'yellow',
'NO_DATA': 'orange',
'CROSSTALK': None,
'UNMASKEDNAN': None
}
maskDict = dict()
for plane, bit in mask.getMaskPlaneDict().items():
color = maskColorFromName.get(plane, None)
if color:
maskDict[1 << bit] = color
# CZW: This value of 0.9 is pretty thick for the alpha.
self.overlay_mask(mask, maskDict, self._maskTransparencyAlpha)
self._flush()
