Google| Subject | Re: Lenses and sharpening |
| From | Floyd L. Davidson |
| Date | 09/20/2014 03:27 (09/19/2014 17:27) |
| Message-ID | <87oaubrsi2.fld@barrow.com> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | nospam |
| Followups | nospam (21m) > Floyd L. Davidson |
nospam <nospam@nospam.invalid>wrote:
nospamWhat I said. You are the fool who makes up the above interpetation.
In article <87wq8zrug3.fld@barrow.com>, Floyd L. Davidson <floyd@apaflo.com>wrote:nospamFloyd L. DavidsonnospamFloyd L. Davidsonnospamhowever, if you change the ppi the print will be different.Floyd L. Davidson
Changing the PPI tag in the image file is *not* what changes the print.
yes it does.
Poor nospam. We can post 30 different identical copies of an image file, with only the PPI tag being different. Anything from 7 to 7000 will do. When loaded into an editor... the image data will be exactly the same for every one of them.
that's what i said originally, then you said ppi applies to displays. now you say it doesn't. hilarious.
You are the only one claiming that, not me. You obviously haven't got a clue!
then someone pretending to be you did:
When loaded into an editor the image data *will* be exactly the same regardless of what the PPI tag is set to.
The data is not changed in the editor, but it is changed in the device driver for either a printer or a monitor. The PPI used is not that of the Exif tag, it is the PPI that the device works at.
In article <87vbojttf4.fld@barrow.com>, Floyd L. Davidson <floyd@apaflo.com>wrote:I'm not sure what nonsense you mean by that. The monitor uses a specific PPI. The data sent to it *is* displayed at the PPI. If it isn't mapped at 1:1, you get a really odd looking screen!Floyd L. Davidson
Until you print... or display an image on a monitor screen. Same thing, and a different value for DPI/PPI.Each and every monitor operates at a given PPI. So does each and every printer.nospam
correct, however display ppi is no longer relevant since modern operating systems no longer map it 1:1.
Incorrect. The printer can only print at 1 set PPI value.Floyd L. Davidsonnospam
The tag in the image file,
1) has no effect at all on the monitor, and
correct.Floyd L. Davidsonnospam
2) has no effect at all on the printer, and
depends on software used to print.
No, the data is not changed as it is loaded. You can edit it, and you can resample it. But that is not caused by the PPI tag.Floyd L. Davidsonnospam
3) has no effect at all on the editor, and
depends on software used to edit.
So why claim that it does? Or are you claiming the monitor or the printer will change to match the data??? Absurb.Floyd L. Davidsonnospam
4) has no effect at all on the image.
correct.
It can't.nospamFloyd L. DavidsonFloyd L. Davidsonnospam
Because chaning the PPI tage in the image file does nothing.
it does when printing, which is what i said.
It doesn't do a thing.
it does.
It does not such thing. Try it and find out.Floyd L. Davidsonnospam
Set the Exif tag to 72, 360, 720, or 7200 and then tell the print driver to make an 8x10 print. It will, but it will run at it's own PPI rate, not the one set in the Exif tag.
setting the image ppi to 7200 results in a print that's 1/10th as big as if it was 72. or to put it another way, printing at 1/10th the size sets the ppi 100x higher than it was before.
once again, you aren't using the software other people are using, yet you tell them how it works. that's really fucked up.You don't even know what the software you are using is doing.
-- Floyd L. Davidson http://www.apaflo.com/ Ukpeagvik (Barrow, Alaska) floyd@apaflo.com
09/13/2014-
