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make image processing match existing method elsewhere #533

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make image processing match existing method elsewhere #533

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16 changes: 9 additions & 7 deletions extensions/skyportal/skyportal/handlers/api/alert.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1629,15 +1629,17 @@ async def get(self, object_id: str = None):
with gzip.open(io.BytesIO(cutout_data), "rb") as f:
with fits.open(io.BytesIO(f.read())) as hdu:
data = hdu[0].data
medfill = np.nanmedian(data.flatten())
median = np.nanmedian(data.flatten())
if (
medfill == np.nan
or medfill == -np.inf
or medfill == np.inf
median == np.nan
or median == -np.inf
or median == np.inf
):
image_corrupt = True

cutout_dict[cutout] = np.nan_to_num(data, nan=medfill)
# fill nans with zeros
cutout_dict[cutout] = np.nan_to_num(data)

# normalize
if normalize_image and not image_corrupt:
cutout_dict[cutout] /= np.linalg.norm(
Expand All @@ -1650,12 +1652,12 @@ async def get(self, object_id: str = None):
# pad to 63x63 if smaller
shape = cutout_dict[cutout].shape
if shape != (63, 63):
medfill = np.nanmedian(cutout_dict[cutout].flatten())
# pad empty rows/cols with 1e-9
cutout_dict[cutout] = np.pad(
cutout_dict[cutout],
[(0, 63 - shape[0]), (0, 63 - shape[1])],
mode="constant",
constant_values=medfill,
constant_values=1e-9,
)
triplet = np.zeros((63, 63, 3))
triplet[:, :, 0] = cutout_dict["science"]
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