Web browsers, including mobile ones, resize the images as they display them on your screen. Pixel dimensions (e.g.2880 x 1920, 900 x 600, etc), on the other hand, primarily affect how your image is seen on-screen. So the request would be 300 dpi the final printed size needed: for example, 300 dpi 5”x7” or 300 dpi 8”x10.” That request should also include what size the image will be printed at. If you are dealing with graphic designers trained at the beginning of digital photography, they tend to ask for images at 300 dpi as a default request, with little additional information. This is an example of there can be too much of a good thing.
The printer only really needs a maximum of 300 dpi at the final size you’re printing, and, if you give it a larger digital file, most of that extra information is really just thrown out by the printer. But there is a point when a lot of extra data or digital information in the file is not going to do you any good. 300 dpi, 240 dpi, etc) affects how your photo looks printed: the higher the resolution, the better and sharper and the image looks when printed. But one has more information and will technically make a better print. The smaller file is 900 x 600 pixels 150 ppi at a size of 4”圆.” The larger file is 2880 x 1920 at 480 ppi at a size of 4”圆.”īoth files will print at the same size (4”圆”) if sent to a printer. The same image, with a resolution of 2880 x 1920. Here’s an example of what we’ve been talking about: Understanding pixel dimension and resolution will help you better deal with those times when someone is requesting a digital file from you, or when you need to give an image to someone to use either in a presentation or to be printed. We need to consider one other number when printing an image, and that is the resolution. This is another complicated story for later.)īut when it comes to printing, pixel dimensions are not the only number you need to be aware of. For reference, we tend to refer to the uncompressed version of the file when talking about file size. Well, the 2880 x 1920 image is 16 MB in size and the 900 x 600 image is 1.5 MB in size.(jpeg compression can also change the size of the file. But both of these images print at 4”圆” in size. Looking at the numbers, it’s obvious that one of these is a larger image file. Imagine two files: a 900 x 600 pixel and a 2880 x 1920 pixel image. The pixel dimensions of an image tell you how much information is contained within the file. Have you noticed that people get confused when talking about the size and resolution of an image? Pixel dimensions are really the only thing you need to be concerned about. Greg Dyro, professional photography expert and head of DF Studio’s motion picture division, clears up image sizes, file sizes, and pixel resolution once and for all.
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