A method and apparatus for selectively applying image enhancement processing to parts of an image. The method includes assigning identifications to metal blanks in a batch of metal blanks that have been processed. The emitter head can be incorporated in lubricator systems of various types, including those utilizing a cycling feed metering system. Syndrome bits are determined by computing a partial syndrome value for each word serially transmitted of the configuration data, where the configuration data includes one or more data vectors. The smaller the difference between these two compliance levels, the more likely that patient suffers from obstructive sleep apnea.