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What does the parameter 72 dpi in Windows & elsewhere mean?
Sep 11, 2017 17:03:55 #
It certainly isn't really resolution. I get this on jpgs from my DSLR. I get 180 from my compact camera???
Sep 11, 2017 17:15:15 #
Here we go again. The spatial resolution of computer monitors is generally 72 to 100 lines per inch, corresponding to pixel resolutions of 72 to 100 ppi. With scanners, optical resolution is sometimes used to distinguish spatial resolution from the number of pixels per inch.
--Bob
--Bob
Sep 11, 2017 17:16:31 #
TheDman
Loc: USA
It is the measurement that translates the digital image to the physical world. If there were no number in that field and you sent the image to a printer, the printer would have no idea how large each pixel in your image should be. Thus it is a required field but isn't used untill you output the image to a printer, and even then it is only used if you don't specify a print size in your printer driver. If you tell the printer to print "full page" or "8x12", the number will be ignored.
Simply put, it tells a printer how many of your image's pixels to cram into an inch of paper space. Aside from that, it has no bearing on anything and can be changed to any number between 1 and 9,999.
Simply put, it tells a printer how many of your image's pixels to cram into an inch of paper space. Aside from that, it has no bearing on anything and can be changed to any number between 1 and 9,999.
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Sep 11, 2017 17:17:08 #
TheDman
Loc: USA
rmalarz wrote:
Here we go again. The spatial resolution of computer monitors is generally 72 to 100 lines per inch, corresponding to pixel resolutions of 72 to 100 ppi.
--Bob
--Bob
Utterly, completely false. Don't listen to Bob. It has absolutely zero to do with monitors.
Sep 11, 2017 17:22:36 #
TheDman
Loc: USA
If you really want to learn about this topic from start to finish, read this link. It's a quick read, and in 5 minutes you'll know all there is to know about ppi.
Sep 11, 2017 17:42:23 #
That reply is a quote was from Wikipedia. It does have to do with monitors.
Has nothing to do with monitors, that article in the link you provided discusses monitors. Sometimes I wonder about you, but not much.
--Bob
Has nothing to do with monitors, that article in the link you provided discusses monitors. Sometimes I wonder about you, but not much.
--Bob
TheDman wrote:
Utterly, completely false. Don't listen to Bob. It has absolutely zero to do with monitors.
Sep 11, 2017 17:50:02 #
TheDman
Loc: USA
rmalarz wrote:
That reply is a quote was from Wikipedia. It does have to do with monitors.
Has nothing to do with monitors, that article in the link you provided discusses monitors. Sometimes I wonder about you, but not much.
--Bob
Has nothing to do with monitors, that article in the link you provided discusses monitors. Sometimes I wonder about you, but not much.
--Bob
It discusses monitors because it is disproving the myth that it has anything to do with them! You're reading comprehension is just abominable. From the article:
"If the fact that computer monitors today all have screen resolutions higher than 72 ppi hasn't convinced you that there's no such thing anymore as a 72 ppi screen resolution standard, here's another important fact to consider. If you previously read through our Image Resolution, Pixel Dimensions and Document Size tutorial, you already know that image resolution has absolutely nothing to do with how your image appears on your screen. In fact, a digital image, on its own, has no inherent resolution at all. It's just pixels. It has a certain number of pixels from left to right and a certain number from top to bottom. The width and height of an image, in pixels, is known as its pixel dimensions, and that's all a computer screen cares about."
What part of "has nothing to do with" do you not understand? You just refuse to admit you are wrong about anything, even in the face of overwhelming evidence.
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Sep 11, 2017 17:58:23 #
Look, it's a known FACT that the original monitor resolutions were 72PPI. Check Apple's History, and the article in Wikipedia that I quoted. That's where that number came from. As monitors improved, like digital cameras, pixel density increased. In case you weren't aware of the fact, monitors have pixels. Little clusters of RGB pixels. In case you need proof, I've photographed them.
The only Myth that should be discussed is your apparent belief that you are the brightest guy in the room.
--Bob
The only Myth that should be discussed is your apparent belief that you are the brightest guy in the room.
--Bob
TheDman wrote:
It discusses monitors because it is disproving the... (show quote)
Sep 11, 2017 18:01:39 #
Just to help you out Dman, here's some reading material you might want to read.
https://en.wikipedia.org/wiki/Display_resolution
http://thescreamonline.com/technology/monitor/monitor_res.html
https://en.wikipedia.org/wiki/Dots_per_inch#Computer_monitor_DPI_standards
I saved the best for last as it is the most fitting.
http://www.dummies.com/photography/digital-photography/resolution/computer-monitor-resolution/
--Bob
https://en.wikipedia.org/wiki/Display_resolution
http://thescreamonline.com/technology/monitor/monitor_res.html
https://en.wikipedia.org/wiki/Dots_per_inch#Computer_monitor_DPI_standards
I saved the best for last as it is the most fitting.
http://www.dummies.com/photography/digital-photography/resolution/computer-monitor-resolution/
--Bob
Sep 11, 2017 18:03:27 #
TheDman
Loc: USA
rmalarz wrote:
Look, it's a know FACT that the original monitor resolutions were 72PPI.
What does any of that have to do with the ppi field in an image, which is what this thread is about? But since you're on the topic, if you'd read my link (which you're terrified to do) you would have seen that it addresses this very fact right from the start:
"The origin of the 72 ppi screen resolution dates all the way back to the mid 1980's when Apple released its first Macintosh computers. These computers included a built-in 9 inch display with a screen resolution of 72 pixels per inch. Why 72 pixels per inch? It's because the Macintosh screens were specifically designed to work in perfect harmony with Apple's ImageWriter printers, which had a print resolution of 144 dots per inch - exactly twice the resolution of the screen. This made it easy to scale the screen display to the printed page, which meant that your text and graphics could be previewed on the screen at the exact size they would appear when printed.
But the 72 pixels per inch screen resolution was a standard only with Apple, and it didn't last. Third party companies selling monitors for the Macintosh didn't stick to the standard, and neither did competing PC monitors. Today, nearly three decades later, technology has greatly improved and the days of screens with a resolution of only 72 ppi are long gone. Even Apple, the company that started the whole thing, now sells their displays with much higher resolutions. No one is making 72 ppi screens anymore. No one is using 72 ppi screens anymore. And yet, even though that old technology is far behind us, we still have a whole lot of people continuing to believe that we need to set the resolution of our images to 72 pixels per inch in Photoshop before uploading them to the web. Most people think the reason is so that the images will display properly on screen, so let's start things off by learning an easy way to prove that your computer monitor, along with every modern computer monitor, actually has a resolution much higher than 72 ppi."
Are you getting it yet? This 72 ppi crap is so moronic that it actually contains TWO fallacies: One, that computer screens are still 72 ppi, and two, that the ppi field in your image is somehow connected to that. It's dumb on top of dumb. No wonder you believe it.
Sep 11, 2017 18:05:07 #
TheDman
Loc: USA
rmalarz wrote:
I saved the best for last as it is the most fitting.
http://www.dummies.com/photography/digital-photography/resolution/computer-monitor-resolution/
--Bob
I saved the best for last as it is the most fitting.
http://www.dummies.com/photography/digital-photography/resolution/computer-monitor-resolution/
--Bob
Yes, this is the most fitting, as it proves that computer screens only care about pixel dimensions and have nothing to do with ppi! LOL! You aren't even smart enough to know when you're contradicting yourself.
Go to that page, hit CTRL+F, and type 72. Let me know how many times the number 72 appears on that page.
Sep 11, 2017 18:07:41 #
Dman, you are about to receive the well earned honor of being the first member to be put in my ignore list. Idiot.
--Bob
--Bob
Sep 11, 2017 18:12:09 #
PHRubin wrote:
It certainly isn't really resolution. I get this on jpgs from my DSLR. I get 180 from my compact camera???
UHH admin convinced all photography-related organizations to use these numbers specifically to increase "traffic" here.
Sep 11, 2017 18:13:23 #
TheDman
Loc: USA
rmalarz wrote:
Dman, you are about to receive the well earned honor of being the first member to be put in my ignore list. Idiot.
--Bob
--Bob
Just can't stand being proven wrong, can you Bob. Your ego is too small to actually admit you don't know everything.
Sep 11, 2017 18:17:10 #
Insults are probably not related to this thread. But, then, you're good at making them in light of your lack of being able to communicate in any manner that resembles intellectuality.
--Bob
--Bob
TheDman wrote:
Just can't stand being proven wrong, can you Bob. Your ego is too small to actually admit you don't know everything.
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