Markzware‘s FlightCheck, the patented preflight solution to check prepress files for print quality control,
has Non-PDF Ground Controls. These include a Resolution section under Images. This Images Resolution
section offers the following Ground Controls:
- Bitmap Resolution
Read on to learn how these preflight features can help you.
Markzware FlightCheck 7.5 Mac Ground Controls:
Resolution – This Ground Control applies only to Color and Grayscale images. This Ground Control only Flags “Effective Resolution“. This means that if you have an image that is originally 300 dpi and you place the image at 200% scaling, the Effective Resolution of the image is cut in half and will be 150 dpi. If you place the same 300 dpi image at 50% scaling, the Effective Resolution doubles and will be 600 dpi. If a Color or Grayscale image’s Effective Resolution is below the dpi value specified in Min Res OR above the specified dpi value in Max Res, this Ground Control will trigger. For example if you set Min Res to 266 and Max Res to 400 and an image has an Effective Resolution of 233 dpi, the image will be flagged as out of range, if the image has an Effective Resolution of 300 dpi, the image will not be flagged and if the image is 405 dpi, the image will be flagged.
Bitmap Resolution – This Ground Control works in the same way as the Resolution Ground Control with one exception, this Ground Control only checks true Bitmap images. A true Bitmap image (sometimes called lineart) only has two colors, Black and White. These images are usually scanned in at high resolution so that the image will print without jaggy edges. Many people use Bitmap images as a sort of fake vector image, thus the higher pixel counts. If the resolution on a Bitmap Tiff for example is too low, the final image will print with jaggy edges, that is why the default values for this Ground Control are Min of 1200 dpi and Max of 2400.
Flatness – Flatness values deal with how vector curves are converted to raster images. Lower Flatness values cause RIPs to do more computation for a given curve. For 300 dpi images, the standard values are Min 1 and Max 3. Flatness values have a range of 0.2 – 100 in Photoshop. The Flatness value [essentially] tells the RIP how smooth to rasterize a vector path (usually a clipping path). Values that are too low will increase the amount of work a RIP has to do to rasterize an image and values that are too high will produce non-smooth curves. With the advances in RIP technology and fast computers with lots of RAM and huge hard drives, this may no longer be as serious an issue as it was with earlier generation RIPs.
FlightCheck can check image resolution, true bitmap resolution, and flatness value.
For more information on Markzware‘s pre press software to check digital files for print quality, see the FlightCheck page.
For more desktop publishing (DTP) and printing solutions, see the Markzware Products page.
Markzware FlightCheck 7.5 Mac Ground Controls: Non-PDF Images Resolution