Once you print an image, you’ll need to start talking about dots per inch, or DPI (more on that later).īut photographers and printers often do talk about PPI as a way to reference image resolution before sending it off to a printer (and this is very useful).įor instance, you might say that an image has 300 ppi, meaning that 300 pixels will ultimately go into a single inch of your final print. However, computer monitors have a PPI–in fact, it’s a set PPI that cannot change, no matter how many times you change the PPI in an editing program. A print doesn’t really have a PPI measurement because it’s not made up of pixels. Note that pixels per inch only applies to images displayed digitally. Specifically, if you look at an inch of an image and counted the pixels lengthwise or heightwise, that would be your PPI measurement. Pixels per inch is a common way to refer to pixel density (in other words, the number of pixels in a set area). Yet, you might be wondering: What exactly is pixels per inch? How do you measure it? PPI: The Key Measurement of Pixel Density Now, I’ve thrown around some pixels per inch language above. But print resolution thinks about detail in a different context–the context of a physical print–whereas digital image resolution thinks about detail in terms of pixels per image, or pixels per inch.
Ultimately, then, resolution really is all about detail. More pixels make for more detail, and more detail equals more resolution. So, when a camera takes an image, it records a certain number of pixels. And when discussed in terms of display output, digital image resolution is often discussed in terms of PPI, or pixels per inch. Now, resolution in printing is different from digital image resolution.ĭigital image resolution refers to the number of pixels an image file contains. If you took a strong enough magnifying glass or microscope, and you examined a standard photo print, you’d see plenty of tiny dots, each corresponding to different colors in an image. Panorama prints are available in a lot of shops with ratios of 1:2, 1:3 and 1:4 being the most common.After all, a print is literally just thousands of tiny dots, all blending to create a lifelike image when viewed from a certain distance. Not many printing shops will have 16:9 prints so if you want to keep this shape you may need to find a custom printer or print it on a 2:3 and trim the edges off. It's the shape of modern TVs and is the most common shape for computer and smart phone screens. Square crops, 1:1 ratios, are very common and you should be able to find square prints at most printing places but there are no 'common' sizes for these.ġ6:9 is a ratio used by a lot of smart phones and video cameras. 11 x 14 inch (it's not exactly a 4:5 ratio but it's very close and a very common size).This is an old standard used in large format film cameras. This is common in compact cameras and smart phones This is the default size of images produced by DSLR and some mirrorless cameras. Here is a list of standard print sizes based on their aspect ratio. However most print shops use standard print sizes which means you'll have to pick the print size that best suits your images crop. Some printing places can do custom print sizes so you can make your print fit into the shape of your image's crop. You'll notice that the 4:5 cuts off the edges of the graffiti and the 1:1 starts to cut into the Lego figure. On this image you can see three different aspect ratios marked out on it.
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