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How to change DPI

Jan 29, 2011, 12:20
Post: #1
How to change DPI
Hi I am trying to make a a graph (in tiff format) for a journal which demands that the "line art must have a resolution of at least 1200 dpi". When i googled i found instructions to click "image' -> scale image and then change the x resolution and y resolution . But the resolutions are not in dpi but in pixels/inch. I read that they are different and 300 ppi is roughly 150 dpi. So what should i do now ? How much x and y resolution should i keep ? Thank you
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Feb 1, 2011, 04:38
Post: #2
RE: How to change DPI
Thank you Ofnuts. It is related to my question on Impress. But I have the graph in Calc and not in Impress. Sorry for the confusion. How do i export the graph as EPS from Calc.

I tried to open the Tiff file (which I had made in Paint) in Gimp and save as EPS. But I want a file with the final size which is half the size of A4 paper. ie about (3"x8"). So I tried to open a new file in Gimp with 36000 x 96000 pixels as suggested in your thread . But Gimp said the file size would be in GBs ! . What could be wrong ?
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Feb 1, 2011, 04:49
Post: #3
RE: How to change DPI
Also, does the graph made in Calc (a bar diagram) qualify as line art ? In that case i will try the other program InkScape which you suggested.
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Feb 1, 2011, 10:02
Post: #4
RE: How to change DPI
Quote:Your math... 3"x8" at 1200 PPI is 3600x9600 pixels, not 36000x96000 (100 times more pixels....)

Thanks for being patient . This is really dumb from my side. Any way I am going to try out what you suggested. Thanks again.
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