MarkRH on "V1.4.6: Where does it read and save IPTC information?"

I am trying to find where in the code it reads and saves the IPTC information from an image during the upload process. I want to automatically convert line breaks in the description field to either <br /> or format with <p></p> tags before it saves that information into the database so that I don't have to edit 100s of image descriptions before or after I upload them.

Thanks,
Mark H