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how can I tell an image's psi?

How can I tell an image's psi? I need it to be 300. It shows 300 on other software (Adobe InDesign CS3 and Corel Paintshop Pro), but it shows up at my printers at 75 psi. I was told this software could show that element, but I can't see how to do it.


Karen Hoy


2 Answers

Voted Best Answer

Hi,

Do you mean PPI? If so, you can either find this out in Acrobat Professional either through the 'Preflight' panel or the 'object inspector'. If you want to find out the actual PPI of an individual image, go to the 'Tools' panel on the right, and select 'Print production', then select 'output preview'. Then when the window appears, choose the 'object inspector' option, you can then click on an image and in the window it will tell you what the resolution is.

If the resoultion displays in pixels per mm, you will want to go into Acrobats Preferences, the last tab on the left and choose 'Units and increments', and set it to 'inches'. This will give you a better and easier to read measurement.

Hope this helps?


By Sean Mitchell   

PSI? Pounds Per Square Inch? (which is a bit insensitive as most of the world works in Pascals (newton/m*m) or torr).

Or do you mean DPI - dots per inch (mm, cm, etc.) and it's brother, PPI points per inch (mm, cm, etc.).

Use the Preflight checker - setup up a standard preflight report to report back on image resolution. I'm sure there is a tutorial around here someplace that can help.

Keep in mind that DPI and PPI, while very similar are not equivalent. DPI has to do with addressable dots, half-tone cells, and such matters when printing on paper. PPI has to do the display of images. The PPI is used to calculate the effective DPI of the output image, given a particular half-tone structure. Wikipedia has an excellent article on the subject https://en.wikipedia.org/wiki/Dots_pe... Grap a cup of tea, some asprin, an a nice quiet room to do some reading.

Enjoy!


Douglas Hanna   

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