In this section, we'll describe two important concepts for image formation, namely, sampling and quantization, and see how we can resize an image with sampling and colors quantized with PIL and scikit-image libraries. We'll use a hands-on approach here and we'll define the concepts while seeing them in action. Ready?
Let's start by importing all of the required packages:
% matplotlib inline # for inline image display inside notebookfrom PIL import Imagefrom skimage.io import imread, imshow, showimport scipy.fftpack as fpfrom scipy import ndimage, misc, signalfrom scipy.stats import signaltonoisefrom skimage import data, img_as_floatfrom skimage.color import rgb2grayfrom skimage.transform import ...
