Google| Subject | Re: Lenses and sharpening |
| From | nospam |
| Date | 09/20/2014 03:48 (09/19/2014 21:48) |
| Message-ID | <190920142148470265%nospam@nospam.invalid> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | Floyd L. Davidson |
| Followups | Floyd L. Davidson (2h & 27m) > nospam |
In article <87oaubrsi2.fld@barrow.com>, Floyd L. Davidson <floyd@apaflo.com>wrote:
Floyd L. Davidsonthe tag doesn't change the pixels but some software looks at the tag. very simple concept.
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.
it means what it says, pixels in an image are no longer mapped 1:1 to pixels in a display because otherwise everything would be very tiny on a hi dpi display.nospamFloyd L. Davidson
In article <87vbojttf4.fld@barrow.com>, Floyd L. Davidson <floyd@apaflo.com>wrote: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.
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!completely wrong on modern graphics systems.
i'm talking about the software, not the printer.Floyd L. DavidsonThe tag in the image file,nospam
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.
Incorrect. The printer can only print at 1 set PPI value.
again, i'm talking about the software, which in some cases will look at the tag and scale it. not all will do that but some does.Floyd L. Davidson3) has no effect at all on the editor, andnospam
depends on software used to edit.
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.
i didn't claim it did.Floyd L. Davidson4) has no effect at all on the image.nospam
correct.
So why claim that it does?
Or are you claiming the monitor or the printer will change to match the data??? Absurb.absurb??
that's like the 3rd or 4th time you've confused b with d.
it does.Floyd L. DavidsonnospamFloyd L. DavidsonBecause chaning the PPI tage in the image file does nothing.nospam
it does when printing, which is what i said.
It doesn't do a thing.
it does.
It can't.
i have, on many occasions.Floyd L. DavidsonSet 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.nospam
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.
It does not such thing. Try it and find out.
when you are able to run the software other people run and have done so, get back to us.
yes i do, and *far* better than you do, who has never used it at all.nospamFloyd L. Davidson
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.
you're talking out your butt.
09/13/2014-
