MORE ON IMAGE DISPLAY IN RUBY
Ruby is a free, open source, object-oriented programming language.
There are many beginner books on Ruby. If you work in the medical
or biological fields, you might want to try my book,
Ruby Programming for Medicine and Biology, which will be
published in the early fall, 2007, by Jones & Bartlett Publishers.
We have previously described
what you need to install to manipulate
images in Ruby (ImageMagick, RMagick, and Tcl/Tk).
Here is a short Ruby script that shows how to use RMagick (Ruby's
interface to ImageMagick) to modify and display an image.
#!/usr/local/bin/ruby
require 'RMagick'
include Magick
leaf = ImageList.new("leaf.jpg").resize!(0.4)
leaf.write("leaf.gif")
leaf2 = ImageList.new("leaf.jpg").first.resize(0.4).blur_image(radius=0.0, sigma=2.5).border(10,10,'rgb(255,110,140)')
leaf2.write("new.gif")
require 'tk'
root = TkRoot.new {title "view"}
TkButton.new(root) do
image TkPhotoImage.new{file "leaf.gif"}
command {exit}
pack
end
TkButton.new(root) do
image TkPhotoImage.new{file "new.gif"}
command {exit}
pack
end
Tk.mainloop
exit
The figure below displays a jpeg image of a leaf (obtained from
Wikipedia as a public domain file: http://en.wikipedia.org/wiki/Image:Leaf_1_web.jpg, and
renamed leaf.jpg for this page).
Rights annotation from Wikipedia:"This image from PD Photo.org has been released into the public
domain by its author and copyright holder, Jon Sullivan."
The image of the leaf sits atop the same image, modified by the
"blur_image" method and wrapped by a border.
More on creating and displaying images in Ruby
Last modified June 19, 2007
