CosineBellWindow

class photutils.psf.CosineBellWindow(alpha)[source]

Bases: photutils.psf.matching.SplitCosineBellWindow

Class to define a 2D cosine bell window function.

Parameters
alphafloat, optional

The percentage of array values that are tapered.

Examples

import matplotlib.pyplot as plt
from photutils.psf import CosineBellWindow
taper = CosineBellWindow(alpha=0.3)
data = taper((101, 101))
plt.imshow(data, cmap='viridis', origin='lower')
plt.colorbar()

(Source code, png, hires.png, pdf, svg)

../_images/photutils-psf-CosineBellWindow-1.png

A 1D cut across the image center:

import matplotlib.pyplot as plt
from photutils.psf import CosineBellWindow
taper = CosineBellWindow(alpha=0.3)
data = taper((101, 101))
plt.plot(data[50, :])

(Source code, png, hires.png, pdf, svg)

../_images/photutils-psf-CosineBellWindow-2.png