Docs for 0.14dev
All versions

RAG ThresholdingΒΆ

This example constructs a Region Adjacency Graph (RAG) and merges regions which are similar in color. We construct a RAG and define edges as the difference in mean color. We then join regions with similar mean color.

../../_images/sphx_glr_plot_rag_mean_color_001.png
from skimage import data, io, segmentation, color
from skimage.future import graph
from matplotlib import pyplot as plt


img = data.coffee()

labels1 = segmentation.slic(img, compactness=30, n_segments=400)
out1 = color.label2rgb(labels1, img, kind='avg')

g = graph.rag_mean_color(img, labels1)
labels2 = graph.cut_threshold(labels1, g, 29)
out2 = color.label2rgb(labels2, img, kind='avg')

fig, ax = plt.subplots(nrows=2, sharex=True, sharey=True,
                       figsize=(6, 8))

ax[0].imshow(out1)
ax[1].imshow(out2)

for a in ax:
    a.axis('off')

plt.tight_layout()

Total running time of the script: ( 0 minutes 5.125 seconds)

Generated by Sphinx-Gallery