Tag Archives: ppi

DPI and PPI in scientific publications

It seems that also graphic design tasks are more and more shifted to the authors. A journal asked me to revise my R “figures with >6 px size fonts at 600 dpi” which does not make so much sense to me as it mixes apples and oranges (DPI and PPI) and does even give me any size estimate of the final image.

Fortunately, there is a great website that has a lot of helpful explanations and demo code.

In summary PPI are number of pixels per inch. Pixel is the smallest unit that can be displayed on a screen, the picture x element. So my screen has about 227 ppi which is super sharp while for historical reasons not the physical but a logical PPI of 96 is being assumed for screens. Continue reading DPI and PPI in scientific publications