|||
This example displays the difference between interpolation methods forimshow
.
If interpolation is None, it defaults to the rcParams["image.interpolation"]
(default: 'antialiased'
).
If the interpolation is 'none'
, then no interpolation is performed for the
Agg, ps and pdf backends. Other backends will default to 'antialiased'
.
For the Agg, ps and pdf backends, interpolation = 'none'
works well when a
big image is scaled down, while interpolation = 'nearest'
works well when
a small image is scaled up.
See Image antialiasing for a
discussion on the default interpolation="antialiased"
option.
import matplotlib.pyplot as pltimport numpy as npmethods = [None, 'none', 'nearest', 'bilinear', 'bicubic', 'spline16', 'spline36', 'hanning', 'hamming', 'hermite', 'kaiser', 'quadric', 'catrom', 'gaussian', 'bessel', 'mitchell', 'sinc', 'lanczos']# Fixing random state for reproducibilitynp.random.seed(19680801)grid = np.random.rand(4, 4)fig, axs = plt.subplots(nrows=3, ncols=6, figsize=(9, 6), subplot_kw={'xticks': [], 'yticks': []})for ax, interp_method in zip(axs.flat, methods): ax.imshow(grid, interpolation=interp_method, cmap='viridis') ax.set_title(str(interp_method))plt.tight_layout()plt.show()
References
The use of the following functions, methods, classes and modules is shown in this example:
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