Compress an image in Cognos?

[randomkiwi]

Hi all, I am looking to compress images that come in via external URLs to a Cognos report. The report has to be exported as an HTML report, as I have not found a way to get the export to PDF option to work with images brought in this way. I was wondering if there was any way to do this? Without compression, images come in at their original resolution and creates a very large file, if saving the HTML report as a PDF. Any advice is appreciated :)