// merge the parameters in the ICS request with those in the
// configuration file.
ICSParamBuilder icsBuilder = new ICSParamBuilder();
icsBuilder.overlayConfigurationParameters(
descriptor.getInputParameters(), config);
icsBuilder.overlayEnvironmentParameters(
descriptor.getInputParameters(), envParams);
// @todo perform check for supported operation type here.
ImageProcessor processor =
ImageProcessorFactory.getInstance().