On Saturday, 26 June 2004 3:20, Craig Bradney wrote: > These photos I get are usually a few mb large and up to 3000+ pixels > wide, sometimes at 300DPI. As I live in Luxembourg now, I have to send > the PDF from Scribus to the printers in Sydney so the size cant be too > big. I resize in Gimp to the frame size I want and make sure DPI is at > 300. Because the images are so large originally I still get excellent > printed image quality after resaving as JPG. Sometimes I use PNG.. > rarely use TIFF.
You can get excellent results with JPEG pictures if you keep them at a decent compression/quality ratio; the colour information is the one that suffer most with compression, not the luminance (grey) channel. Images really don't need a resolution above 300 dpi, in most cases; the optimal should be 2 x LPI, where the LPI is usually 133-150 lpi, and 300 dpi should be ok for most layouts. More image information (read resolution) means extra time spent in the RIP-ing stage and just huge files with no noticeably extra quality.
