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Jul 16, 2021 at 3:04 comment added Mark Ransom @MichaelC and early versions of the EXIF standard specified that the default ppi should be 72 if no better value could be determined. It was really intended for scanners, not cameras. I think newer versions of the standard relaxed that requirement.
Jan 8, 2014 at 18:21 comment added Michael C A careful reading of the question will show that ppi is used throughout, other than when quoting how others (mis)state it. The ppi field in the EXIF apparently must be populated with some number when the image file comes out of the camera to be compliant with the DCF standard.
Jan 8, 2014 at 16:24 review First posts
Jan 8, 2014 at 16:37
Jan 8, 2014 at 16:04 history answered Nerf Herder CC BY-SA 3.0