Google| Subject | Re: Lenses and sharpening |
| From | nospam |
| Date | 2014-09-20 06:43 (2014-09-20 00:43) |
| Message-ID | <200920140043158347%nospam@nospam.invalid> |
| Client | |
| Newsgroups | rec.photo.digital |
| Follows | Floyd L. Davidson |
In article <87fvfnrkoh.fld@barrow.com>, Floyd L. Davidson <floyd@apaflo.com>wrote:
the display driver does not do scaling.Floyd L. DavidsonnospamFloyd L. DavidsonFloyd 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.
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.
But the editor is not where that is adjusted for. It is exactly as I stated, a function of the device driver.
scaling is done either in the app or the graphics engine or both.
nothing idiotic about it. it's exactly correct.Floyd L. DavidsonThe 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!nospam
completely wrong on modern graphics systems.
That is a really idiotic statement. Not just wrong, just plane dumb.
i've been working with hi dpi displays for a few years now.
have you? no. i know what's involved. you don't.
this is further demonstrated by your numerous errors in the thread about the dell 5k display.
what sends data to the printer? software!Floyd L. DavidsonnospamFloyd L. Davidson2) has no effect at all on the printer, andnospam
depends on software used to print.
Incorrect. The printer can only print at 1 set PPI value.
i'm talking about the software, not the printer.
To respond to a statement about the printer... which isn't telling us anything at all.
some software will use the ppi tag to tell the printer how big to make the print. other software won't. simple concept.
so why are you arguing?Floyd L. DavidsonnospamFloyd 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.
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.
At least this time you are responding to the comment rather than to something only in your head.
An editor can scale an image depending on the PPI tag, of course. Nobody has said it can't.
The point is that it won't do it automatically just because you opened the image file.that depends on the software. some does and some does not.
It has nothing to do with editing the image or with viewing the image. It is only done when the user manually tells the program to rescale the image to match the PPI tag.unless the software does it automatically.
i'm not making up anything.Floyd L. DavidsonnospamFloyd 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.
i have, on many occasions.
Don't make up stories.
if i change the print size the ppi changes. it has to!
some software might not update the ppi tag but that would be a shortcoming of the software. apparently you use such software.
there is if you want to talk about how they work or not.nospamFloyd L. Davidson
when you are able to run the software other people run and have done so, get back to us.
I have done so, I don't do so. There is no need.
you haven't used photoshop, lightroom and quite a bit more because none of them run on your system. any so called 'use' would have been brief and on someone elses system, certainly not enough to understand how it works.
telling people how software they use works when you don't use it is really fucked up.
Virtually all editors use the PPI tag in the same way,virtually all means not all, so you actually agree with me and are trying to weasel out of it.
though granted the software you use tends to make an attempt at confusing people, and has succeeded in your case.another one of your insults.
at this point, it's clear you have no idea what you're talking about.
more insults. i'm certainly not going to try to convince you to spew anything further.Floyd L. DavidsonnospamnospamFloyd 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.
yes i do, and *far* better than you do, who has never used it at all.
you're talking out your butt.
Seems to be what you are doing.
Whatever, this is just another silly sidetracked thread where you inject as much confusion and stupidity as possible. Unless you can convince me you want a reasonable discussion, I'll not bother with more on this.
2014-09-13-
