Resolution (Page 2): Image resolution affects prints only. Display screen resolutions are fixed: 72 pixels per inch (ppi) for Windows and 96 ppi for Mac (AFAIR). Changing the displayed...

cornhillfarm

Image resolution affects prints only. Display screen resolutions are fixed: 72 pixels per inch (ppi) for Windows and 96 ppi for Mac (AFAIR). Changing the displayed image size from 100% means that the software drops information to downsize and unintelligently adds data above 100%, giving the familiar blocked appearance at 200% or 400%. But it still displays at 72 or 96 ppi

Print resolution is important in matching image dimensions to paper dimensions. An image which has 2100 pixels on the long edge and 1800 pixels on the short edge will print satisfactorily at 300 dpi on 6" x 7" paper. The ratios are the same. If the ratios are not the same then either the image will not fill all of the paper or the image will be cropped. Many printers offer a Fit to Paper option but it is not clear to me whether the software crops the image or skews the aspect ratio. I never use Fit to Paper.

HTH

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

will47 wrote:

What exactly is resolution? For instance, if I change the resolution from 300 to 200 what really happens? Does quality suffer (if the image was good to beging with)? What is the easiest way to change the resolution? Just go to PS>image size and change from there? Any help will be appreciated. Thanks.

A simple google search came up with over 50 answers. Here is just one example.
https://support.spoonflower.com/hc/en-us/articles/204277834-What-is-resolution-and-how-does-it-affect-my-image-

NCMtnMan Loc: N. Fork New River, Ashe Co., NC

Number of dots per square inch on a printer and number of pixels per square inch on a monitor or TV screen. Think of your old CRT TV or monitor screen compared to your digital TV. If you have one square inch of surface in which to place dots and you must place the dots equally spaced. Then you will need smaller dots to put 300 in the space versus 200 in the space. The smaller the dots, the finer the detail and the greater the clarity.

cornhillfarm

Not square inch. Linear inch.

BJW

I would love to hear what Gene51 has to say.
His explanations are usually so "tack sharp" and understandable.
Gene?
Please?
Thanks,
BJW

Tomcat5133 Loc: Gladwyne PA

I have been researching how far I can blow up resolution to create a collection for prints. A lot of my images are
fine but was testing size increase for printing. From video I think their are different shapes fo the dots it is a lot more
complicated. I also am thinking is a not so sharp image (thats what I get from my Sony cameras now what I want.)
I mentioned in a forum that my many 35 slides have a color saturation and less sharp which is appealing.

selmslie Loc: Fernandina Beach, FL, USA

will47 wrote:

What exactly is resolution? For instance, if I change the resolution from 300 to 200 what really happens? ...

You are referring to the DPI setting in an image. It serves absolutely no purpose at all. You can change it to 1 or 10000 and the actual resolution of the image is not affected.

The only resolution that counts is the image dimension - the height and width in pixels. The resolution of the image changes only when you change those dimensions by cropping or resizing.

GoofyNewfie Loc: Kansas City

Captain C’s explanation of DPI vs PPI in the FAQ HERE.

frankraney Loc: Clovis, Ca.

will47 wrote:

What exactly is resolution? For instance, if I change the resolution from 300 to 200 what really happens? Does quality suffer (if the image was good to beging with)? What is the easiest way to change the resolution? Just go to PS>image size and change from there? Any help will be appreciated. Thanks.

The original photo is not change if you do in Photoshop. resolution is just viewing quality so to speak it's how many dots per inch is printed or view it on your screen Mark a couple of us have already gave you a couple of links to explain exactly a good resolution for printing or viewing so I won't do that

vbhargava Loc: San Diego

Image resolution and image size go hand in hand. If you have a 10"x10" image with 100 dpi. This means in each direction you have 1000 pixels. You can reduce the size of the image to 1"x1" and increase the image resolution to 1000 dpi and have the same number of pixels in each direction. So it is important to know both and image resolution and image size. For this reason when exporting image in LR there is an option to define the maximum number of pixels in either length or width, rather than size or resolution alone.

PHRubin Loc: Nashville TN USA

Linda From Maine wrote:

Here are two images, each 2000 pixels wide, both a... (show quote)

OK Linda, now you have me confused. It seems to me that the 2 images are the same but they are set to be printed differently. If both are 2,000 pixels wide but different PPI, the difference is only the size of the print. Agree?

PHRubin Loc: Nashville TN USA

To ME, camera body resolution simply refers to the number of pixels. My 80D is 6,000 by 4,000 (24 million) while my 1st DSLR, an XT, was 3,456 by 2,034 (~8 million). Lenses are rated differently.

Linda From Maine Loc: Yakima, Washington

PHRubin wrote:

OK Linda, now you have me confused. It seems to me that the 2 images are the same but they are set to be printed differently. If both are 2,000 pixels wide but different PPI, the difference is only the size of the print. Agree?

They will print the same physical size if that's what I choose.

You can print any size at any resolution; the difference will be in quality. Have you ever uploaded to a site, such as Costo or Walgreens, and received a warning that the image was too low res to print at that size? It's not that they couldn't physically do it, they're just letting you know you won't be satisfied with the outcome because there are too few pixels per inch to "fill in the blanks"

See what Via the Lens wrote on page 1 of this thread:
https://www.uglyhedgehog.com/t-561781-1.html#9544668

.

rfmaude41 Loc: Lancaster, Texas (DFW area)

cornhillfarm wrote:

Display screen resolutions are fixed: 72 pixels per inch (ppi) for Windows and 96 ppi for Mac (AFAIR).HTH

Can you then explain how a 2K or 4K monitor only displays 72 ppi/dpi ?

For instance, my 2K 27" monitor is capable of displaying 124 ppi/dpi and a 4k would display 165 ppi/dpi on a 27" monitor, eh ?

rfmaude41 Loc: Lancaster, Texas (DFW area)

rfmaude41 wrote:

Can you then explain how a 2K or 4K monitor only displays 72 ppi/dpi ?

For instance, my 2K 27" monitor is capable of displaying 124 ppi/dpi and a 4k would display 165 ppi/dpi on a 27" monitor, eh ?

72 ppi is now considered a "junk" monitor !!!!!