I am working in a project , which includes some image maniputaion functions.After a quick googling i found ImageMagick is best to satisfy my needs.
I installed ImageMagic using sudo apt-get install imagemagick.
After installation i tested some of the commands provided by imagemagick ( convert , identify). But it is not working and causing an error “No Delegates for this image”.
Then i realised that there may be some dependencies for ImageMagick and  i searched for delegates, http://www.imagemagick.org/download/delegates/
I have tried the wiki page http://wiki.helioviewer.org/wiki/Setting_Up_ImageMagick for setting up ImageMagick but failed again
So decided to install it from source.
You’ll need to install a number of dependencies in addition to ImageMagick in order to have a fully functional ImageMagick installation. It’s important that these dependencies are installed before you start configuring and compiling ImageMagick, because the configure script for ImageMagick will disable functionality that isn’t available because of missing dependencies at compile time.
The list of dependecies which found usefull for my use case are
sudo apt-get install libjpeg8-dev libpng12-dev libglib2.0-dev libfontconfig1-dev zlib1g-dev libtiff4-dev
After installing the above dependencies i just started to compile ImageMagick from source.
You can download the ImageMagick source from any mirrors http://www.imagemagick.org/script/download.php
ImageMagick-6.7.5-6 is the latest version.
After downloding the source then tar it.
tar xvfz ImageMagick-6.7.5-6
cd ImageMagick-6.7.5-6
./configure
If you need to do some advanced configuration then follow this link http://www.imagemagick.org/script/advanced-unix-installation.php
sudo make
sudo make install
Installation completed ,Hooray..:) I checked ImageMagick commands and found the same delegate problem again.:(
Compiling should restart from step ./configure and i added a –disable-shared option
./configure –disable-shared
Installtion completed again..No emotion.
I checked whether all the delegates and dependencies configured with ImageMagick properly
You can check it using convert -list configure
again.Delegates are configured properly.
DELEGATES fontconfig freetype jpeg jng mpeg png x11 zlib
SO time to run some ImageMagick commands.
Started with identify command.
identify a.jpg
its working..WOWWW..
a.jpg JPEG 321×400 321×400+0+0 8-bit DirectClass 28.9KB 0.000u 0:00.000
then i tried convert one image to another format
convert a.jpg a.gif
WOOOWWW again, its working..:)
So happy emotions again.:) . ImageMagick set up.
Now i am going to get my hands dirty with ImageMagick. Courtesy : My Guru Jaganadhg , he usually says so , if he started learning new things.

http://srijiths.wordpress.com/2012/02/17/installing-imagemagick-in-ubuntu-11-04/