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WIP: Region Growing Algorithm: unseeded and seeded #228

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  • Adds region growing demonstration : both seeded and unseeded
    Status: Initial

# points. If more than one point has the same label then they will be contribute
# to the same segment.

img = load("assets/worm.jpg")
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Generally, we should not expect users have an "assets" folder at hand. We should either add it to TestImages or using some explicit download tricks.

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I think I'll add worm.png to imgur then

# Now, let's segment this image using unseeded_region_growing

seg_small = unseeded_region_growing(img_small, 0.05) # here 0.05 is the threshold
result = map(i->get_random_color(i), labels_map(seg_small)) .* (1 .-Gray.(img_small))
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Use IndirectArray instead.

labels = labels_map(segments)
colored_labels = IndirectArray(labels, distinguishable_colors(maximum(labels)))
masked_colored_labels = colored_labels .* (1 .- bw)
mosaic(img, colored_labels, masked_colored_labels; nrow=1)
# Here we use `IndirectArray` to store the indexed image, for more explaination on it please
# check the tutorial [Indexed image in 5 minutes](@ref demo_indexed_image).

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Really we should decide about JuliaImages/ImageSegmentation.jl#76 first

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