#/thumb/w600/h500/width777/height666/cr4:3/cropratio4:3/q7/quality70/cffffff/color000/nc/nocache/any/further/path/to/image.png

# paramters must be provided in fake url
# image must be located in /images/
# RewriteRule ^thumb/(.*)$   SmartImageResizerParameters.php?parameters=$1 [NC]

# normal call with fixed parameters without access in the url
# /thumb/any/further/path/to/image.png
# fixed parameters 
# RewriteRule ^thumb/(.*)$   SmartImageResizer.php?width=200&image=/images/$1 [NC]