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Contents
#! /usr/local/bin/ruby -w
require 'RMagick'
# Demonstrate the Image#contrast method
img = Magick::ImageList.new('images/Flower_Hat.jpg')
img.resize!(0.5)
# Prepare to label each image with a number from 1 to 4
legend = Magick::Draw.new
legend.font_family = 'Helvetica'
legend.stroke = 'transparent'
legend.pointsize = 12
legend.gravity = Magick::SouthEastGravity
# Add 3 images, each one having slightly less contrast
f = 1
3.times {
img << img.contrast
# Annotate the previous image
legend.annotate(img[f-1], 0,0,7,10, f.to_s)
f += 1
}
# Annotate the last image
legend.annotate(img, 0,0,7,10, f.to_s)
# Montage into a single image
imgs = img.montage {
self.geometry = Magick::Geometry.new(img.columns, img.rows)
self.tile = "2x2"
}
imgs.write('contrast.jpg')
#imgs.display
exit
Version data entries
30 entries across 30 versions & 1 rubygems