ImageMagick -liquid-rescale option error

Question

I want to use Seam Carving, and found ImageMagick maybe a good choice.
Then I install ImageMagick from source as this indicate.

My problem is: When I type the command
convert logo_trimmed.jpg -liquid-rescale 75x100%\! logo_lqr.jpg
it gives the following error:
convert: delegate library support not built-in 'logo_trimmed.jpg' (LQR) @ error/resize.c/LiquidRescaleImage/1900.

I thought it may because lack of liblqr support, so I go to Liquid Rescale to install it
and then make uninstall ImageMagick and install it again.
However, problem remains the same.

Can anyone tell me how to make convert -liquid-rescale works?
Thanks for any hint.

Answer 1

After installing liblqr, you have to install imagemagick by running configure prior to make, see build instructions here:

http://www.imagemagick.org/script/install-source.php#unix

If you don't run configure it will not pick your new library.

And after you've compiled imagemagick check that LQR delegate library was installed by running:

convert -list configure | grep -i "delegates"

and seeing LQR listed there.