convert: unrecognized distortion type `Shepards'

[merovinq]

I am new to many of the feature of imagemagick an have only used it in the past to do basic image converting. I am trying the Shepards distort example on the following page:

http://www.imagemagick.org/Usage/distorts/#shepards

but I am getting the following error: convert: unrecognized distortion type `Shepards'

Here is the command I am issuing to the comandline on my debian box

Code: Select all

convert split_contrast_3.tif -virtual-pixel Black  -distort Shepards '2,11 9,11  18,38 9,38  183,17 192,17  200,39 192,39'  larplawn_aud1.tif

Currently using Version: ImageMagick 6.3.7 11/17/10 Q16

Any idea on how to solve this? Thanks!

[el_supremo]

The Shepards distortion wasn't added until version 6.4.2 so you would need to upgrade.

Pete