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Added input parameter. #1

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47ce4f1
Added new argument for filter
NazBen Apr 30, 2016
29a2dcd
Merge pull request #1 from NazBen/simcluster_mod
NazBen Apr 30, 2016
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4 changes: 3 additions & 1 deletion sample-project/scripts/simcluster
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,8 @@ def main(argv):
help='the x dimension (in pixels) of the image')
parser.add_argument('-y', type=int, default=512,
help='the y dimension (in pixels) of the image')
parser.add_argument('-sigma', type=float, default=1.,
help='the std of the gaussian noise')

# Add an argument to handle the output file. If we use argparse.FileType it will
# handle opening a writeable file (and ensuring we can write to it).
Expand All @@ -33,7 +35,7 @@ def main(argv):

args = parser.parse_args(argv)

image = simulated_cluster(n_stars=args.stars, dimensions=(args.x, args.y))
image = simulated_cluster(n_stars=args.stars, dimensions=(args.x, args.y), sigma=args.sigma)

# For now the file writing is simple enough that we leave it in the main() function; in the future
# we may want to break this out into its own routine that takes a filename and the image array
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8 changes: 5 additions & 3 deletions sample-project/simcluster/simcluster.py
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Expand Up @@ -6,12 +6,14 @@

CLUSTER_DEFAULTS = {
'stars': 10000,
'dimensions': (512, 512)
'dimensions': (512, 512),
'sigma': 1.
}


def simulated_cluster(n_stars=CLUSTER_DEFAULTS['stars'],
dimensions=CLUSTER_DEFAULTS['dimensions']):
dimensions=CLUSTER_DEFAULTS['dimensions'],
sigma=CLUSTER_DEFAULTS['sigma']):
"""
Generates an image simulating a cluster of stars, including
a Gaussian filter and background noise.
Expand Down Expand Up @@ -55,7 +57,7 @@ def simulated_cluster(n_stars=CLUSTER_DEFAULTS['stars'],
image[y[idx], x[idx]] += fluxes[idx]

# Convolve with a gaussian
image = gaussian_filter(image, sigma=1)
image = gaussian_filter(image, sigma=sigma)

# Add noise
image += np.random.normal(1., 0.001, image.shape)
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