Wow, it is exact the tool I was looking for. I'm struggling a bit with the supported formats in squeak. I did a lot of imagemagick in the past mostly via shell scripts or perl. I'll test this very soon. The only caveat is that imagemagick needs a lot memory to operate.
thanks for this,
Norbert
On Sun, 2007-08-05 at 13:42 +0200, stefan_reichhart@students.unibe.ch wrote:
Hi all,
"Smagick" is a small high level interface to control "Image Magick" from within a Smalltalk environment, eg. Squeak. The purpose of this package is to provide high performance image manipulations without the need to know all the low level details of image processing.
A possible use case could be a web application providing image up/ download or even manipulation (for example thumbnailing, resizing, recompression) to multiple users ...
What can "Smagick" do right now:
- it can read all internal image properties (examples: width,
height, colorspace, encoder, quality, bounding-box, ......)
- it can read most exif information (examples: camera software,
date, orientation, shutter-speed, .....)
- it can convert any image format* to any other format*
- it can apply various image transformations concerning quality,
colors, effects, orientation, size, metas (examples: resize, charcoal, emboss, colorspace, exif-auto-orientation, .....)
- it can compose [work in progress] multiple images (examples:
multiply, difference, add, ......)
- depends on your "Image Magick" installation
I attached some more information about getting, installing and using "Smagick" at the bottom of this mail ...
I will add more features and try to make the interface more simple and robust ... in the meantime I'm looking forward to some feedback
Cheers, Stef
GETTING "Smagick"
"Smagick" depends on
- OSProcess (+ UnixVM)
You can get "Smagick" from
It will load all dependencies (except OSProcess)
INSTALLING "Smagick"
If you have "OmniBrowser" installed, execute the following after loading "Smagick" SmagickEnvironment setup This will ask you for the installation path of "Image Magick", providing an example of how this could look like ;). Furthermore it will check whether "Image Magick" really exists in the given location.
If you don't have Omnibrowser installed, use SmagickEnvironment setupSilent: 'your installation path' This will set the path but not perform a check.
SOME SIMPLE EXAMPLES OF USING "Smagick"
" this will apply some transformations on aFile.JPG and then save it to anotherFile.PNG " " NOTICE: the order of transformations is relevant !!! " (SmagickImage on: 'aFile.jpg') convertTo: 'anotherFile.png' with: [ :image | image sharpen: 20; negate; autoOriented; polaroid; colors: 256; quality: 20 ]
" this will negate the cyan color channel only and then save aFile.JPG to anotherFile.PNG " (SmagickImage on: 'aFile.jpg') convertTo: 'anotherFile.png' with: [ :image | image image with: SmagickConstants cyan do: [ :channel | channel negate ] ]
" get the compression ratio of aFile.JPG " (SmagickImage on: 'aFile.jpg') compressionQuality inspect