Image Resolution Design Guidelines
Markzware, makers of the FlightCheck electronic preflight application to check Adobe InDesign CS5 and many more file types, shares a view of upsampling to increase image resolution, an area often flagged during electronic preflight to check InDesign and other DTP files:
Image resolution refers to the measurement of the number of squares (called pixels) of color information in an inch. Below is an illustration of how the same image might appear at a different pixel image resolution.
Image Source: BetterInColor.com
Design guidelines on how to increase image resolution during electronic preflight to prepare files for printing, like graphic design color layouts. They describe and advise against upsampling to improve image resolution in the design guidelines section called, “Upsampling in Photoshop to Improve an Image. ” The recommendation to increase image resolution with 72 dpi image upsampling to 300 dpi would produce documents of inferior print quality and is not recommended.
Naturally, design guidelines, file preparation manuals and customer service representatives are all great, but nothing will better help you, as a print-buyer, than to check Adobe InDesign CS5 layouts (or Quark, Adobe Illustrator, etc.) to prepare files for printing with Markzware FlightCheck, before sending them to the printer. The latest version was just released for Macintosh and now FlightCheck can check Adobe InDesign CS5 files!
For further information on image resolution, including information on high-resolution and low-resolution for images, see the section of the FlightCheck Manual on Image Resolution.
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