4 votes

Should I preemptively downsize photo resolution for smaller prints?

This answer assumes competence on the part of the photo lab you're using. If you think they're not competent, then use a different photo lab instead, rather than trying to work around their lack of ...
Philip Kendall's user avatar
  • 21.9k
4 votes

Is there a general formula for image size vs. print size?

The big problem you have here is that your aspect ratio is wrong. A0 (or any other A size paper) has an aspect ratio of 1:sqrt(2) or 1:1.414 or so. Your image has an aspect ratio of 2048/1152 = 1.777. ...
Philip Kendall's user avatar
  • 21.9k
4 votes

Photoshop changing the ppi of an image

PPI is unimportant and meaningless in a camera picture (inches of what?). The only thing that matters is the actual size in pixels. The only kind of capture where the PPI matters is a scan, because it ...
xenoid's user avatar
  • 21.3k
3 votes

What PPI I need to set for photos to avoid pixelated, jagged edges on paper?

Your phone will not generate images with a pixel density of 72ppi... it will generate images with x/y pixel dimensions. What that means in terms of pixels per inch depends on how large it is printed/...
Steven Kersting's user avatar
2 votes

How does PPI relate to DPI in photo metadata?

First, the "size" of your image is absolutely NOT measured in kilobytes. That is only the file size, which largely depends on the degree of compression you choose. Due to the JPG Quality factor ...
WayneF's user avatar
  • 12.9k
2 votes
Accepted

What PPI I need to set for photos to avoid pixelated, jagged edges on paper?

Usually, it is recommended to print photos at 300dpi (= dots per inch, which is the print equivalent to ppi, as printer cannot print pixels but dots). However, if you simply set the pixel density to ...
jng224's user avatar
  • 1,608
1 vote

Canon 5D Mark III - Printing at 40 x 30 inches help

Preference for PPI will vary based on what it is and how close people will be to it looking at it. For looking up close at a photo the most you should need is 300ppi but it can definitely still look ...
Anthony B's user avatar
1 vote

Photoshop changing the ppi of an image

Most likely, you saved it in Photoshop with menu File - Save for Web. Which is fine, it is still the same image, but that "Save for Web" purpose is to remove all of the Exif data, which is where the ...
WayneF's user avatar
  • 12.9k
1 vote

How does PPI relate to DPI in photo metadata?

For JPEG images the size of the image in pixels plus the complexity of the images (and some other factors) influences the size of the image file in kilobytes, but there isn't necessarily a 1:1 link. ...
David Rouse's user avatar
  • 4,026
1 vote
Accepted

How do I estimate PPI from camera specifications?

From https://en.wikipedia.org/wiki/Image_sensor_format#Smaller_sensors ... the 2/3 inch sensor size is 8.8 x 6.6 mm. I don't know your image size, but from the 2,200,000 pixels, the calculator at ...
WayneF's user avatar
  • 12.9k
1 vote

How large can I print an old illustration?

There are different topics here. Forget the PPI for a moment. 1. What is your starting file size in pixels? What is the resolution of your scans, or photos? This is the main issue here. Of course, ...
Rafael's user avatar
  • 24.8k
1 vote

How large can I print an old illustration?

The 300 ppi is a norm derived from colour printing with offset, where the images had to be transformed to grids of separate points. Iirc, those grids were closer to 150 dpi, which corresponds to 300 ...
remco's user avatar
  • 3,161
1 vote

Pixels per inch relation

Probably we could have a theoretical discussion on angles, distances, distortions, focal planes, etc. But probably it is simply easier to print a grid of perfect squares of 1x1 inch each and take a ...
Rafael's user avatar
  • 24.8k
1 vote

What PPI do I set for best quality print?

To get the maximum quality you would usually send the native resolution. This will rarely be a nice and round number. This is because a printer can discard extra but it cannot make up for missing ...
Itai's user avatar
  • 103k
1 vote

Is there any practical difference between saving at 300ppi or 72ppi?

For completeness, I'll add an example when the PPI tag matters even without printing. Some modern programming environments/platforms (for example, .NET WPF uses device independent pixels) do render ...
Zeus's user avatar
  • 1,549
1 vote

How do I generate high quality prints with an ink jet printer?

The most important aspect is good input. Poor quality image = poor quality print. After that one aspect that has been overlooked so far here is colour management. ICC profiles for the specific printer ...
dmkonlinux's user avatar
  • 1,003

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