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Contents
#! /usr/local/bin/ruby -w
require 'RMagick'
# Demonstrate the Image#reduce_noise method
img = Magick::Image.read('images/Flower_Hat.jpg').first
img = img.add_noise(Magick::UniformNoise)
eimg = img.reduce_noise(0)
# Zoom in so we can see the change
img.resize!(3)
eimg.resize!(3)
# Make a before-and-after composite
eimg.crop!(eimg.columns/2, 0, eimg.columns/2, eimg.rows)
img = img.composite(eimg, Magick::EastGravity, Magick::OverCompositeOp)
# Draw a black line between the before and after parts.
line = Magick::Draw.new
line.line(img.columns/2, 0, img.columns/2, img.rows)
line.draw(img)
# Crop everything but the face.
img.crop!(Magick::CenterGravity, 250, 200)
img.write('reduce_noise.jpg')
exit
Version data entries
67 entries across 67 versions & 2 rubygems