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Vighnesh Birodkar
30 lines
823 B
Python
30 lines
823 B
Python
"""
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=====================================
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Drawing Region Adjacency Graphs (RAGs)
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======================================
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This example constructs a Region Adjacency Graph (RAG) and draws it with
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the `rag_draw` method.
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"""
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from skimage import graph, data, segmentation
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from matplotlib import pyplot as plt, colors
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img = data.coffee()
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labels = segmentation.slic(img, compactness=30, n_segments=400)
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g = graph.rag_mean_color(img, labels)
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out = graph.draw_rag(labels, g, img)
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plt.figure()
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plt.title("RAG with all edges shown in green.")
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plt.imshow(out)
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cmap = colors.ListedColormap(['#00ff00', '#ff0000'])
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out = graph.draw_rag(labels, g, img,colormap=cmap, thresh=30, desaturate=True)
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plt.figure()
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plt.title("RAG with edge weights less than 30, color "
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"mapped between green and red.")
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plt.imshow(out)
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plt.show()
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