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# Blurring images

We can blur images with a Gaussian filter (http://en.wikipedia.org/wiki/Gaussian_filter). This filter is based on the normal distribution. A corresponding SciPy function requires the standard deviation as a parameter. In this recipe, we will also plot a Polar rose and a spiral http://en.wikipedia.org/wiki/Polar_coordinate_system. These figures are not directly related, but it seemed more fun to combine them here.

## How to do it...

We start by initializing the polar plots, after which we will blur the Lena image and plot using polar coordinates:

1. Initialize the polar plots:
NFIGURES = 5
k = np.random.random_integers(1, 5, NFIGURES)
a = np.random.random_integers(1, 5, NFIGURES)
colors = ['b', 'g', 'r', 'c', 'm', 'y', 'k']

2. To blur Lena, ...

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