To install image converter in Nautilus, the native file browser for Ubuntu Precise Pangolin 12.04; Open Terminal (Control+Alt+T) and type:
sudo apt-get install nautilus-image-converter
Enter password and choose ‘Yes’. It is done.
Above shall install an image size converter in Nautilus. Now clicking the context menu shall display an option to re-size an image, clicking upon which shall call an application widow with options for re-sizing the image and to save the new image separately.
BTW the above command works for the Linux Mint 13 as well; even though its browser is Caja. No need to change ‘nautilus’ to ‘caja’ in above command. It works fine as it is.
© Sandeep Bhalla