![]() ![]() The resolution measurement dictates how closely the pixels are packed together. ![]() This too makes sense because digital images are displayed in teeny, tiny individual blocks of color called pixels. When referencing an image onscreen - on a computer monitor, TV, plasma, or projector - resolution is stated in pixels per inch (ppi). This makes perfect sense because printers print dots, and that’s what a printed image is composed of. It’s a measurement used in printing and it’s stated in dots per inch (dpi). Resolution, when referring to an image, is the number of pixels displayed per unit of printed length. I’ll also talk about increasing resolution, otherwise known as The Dark Art of Upsampling. I’ll explain exactly what resolution is, how to change it without altering image quality, how much you need when, and (gasp!) when it doesn’t matter at all. I’d like to uncover the truth about resolution and protect you against such horror. The poor customer service rep hangs up, tells the story to the whole office, and the designer is dubbed a brainless prat. An irate call to customer service usually ensues, followed by an embarrassing explanation of Resolution 101 by someone half their age. They buy a high-quality photo from a stock agency, open it in Photoshop, and black out with rage when they see “resolution = 72” in the Image Size dialog. I know better now, but many professional designers don’t. Suddenly, I was face to face with A Serious Resizing Situation and no clue what to do. ![]() Then I needed to change the resolution of an image. I acted like I got it, but what I’d really done was memorize a couple of magic numbers: 300 for print and 72 for screen. When I became a pixel pusher years ago, one of the toughest concepts to wrap my brain around was that of image resolution: What the heck was it, how did I change it without trashing my image, how much did I need when, and so on. ![]()
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December 2022
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