TukeyWindow

class photutils.psf.matching.TukeyWindow(alpha)

Bases: SplitCosineBellWindow

Class to define a 2D Tukey window function.

The Tukey window is a taper formed by using a split cosine bell function with ends that touch zero.

Parameters:

alphafloat, optional

The percentage of array values that are tapered.

Examples

import matplotlib.pyplot as plt
from photutils.psf import TukeyWindow

taper = TukeyWindow(alpha=0.4)
data = taper((101, 101))
plt.imshow(data, cmap='viridis', origin='lower')
plt.colorbar()

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

A 1D cut across the image center:

import matplotlib.pyplot as plt
from photutils.psf import TukeyWindow

taper = TukeyWindow(alpha=0.4)
data = taper((101, 101))
plt.plot(data[50, :])

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

Methods Summary

__call__(shape)

Call self as a function to return a 2D window function of the given shape.

Methods Documentation

__call__(shape)

Call self as a function to return a 2D window function of the given shape.

Parameters:

shapetuple of int

The size of the output array along each axis.

Returns:

result2D ndarray

The window function as a 2D array.