Image size can be a confusing concept because there are two different kinds of size we’re talking about: With pixels and resolution under our belt, we can start talking about size. 3840 × 1600: the resolution of my current display.1920 × 1200: common large-screen resolution.800 × 600: minimum resolution required by Windows 10.1280 × 768: minimum resolution required by Windows 8.640 × 350: EGA video adapter used in early IBM PCs.440 × 486: the approximate resolution of old (analog) NTSC television.640 × 480: standard definition, or SD, digital television.1280 × 720, also known as 720P, and also referred to as HD.1920 × 1080, also known as 1080P: high-quality High Definition (HD) video.3840 × 2160: 4k HD, or just 4K, an emerging standard for the next size of high-definition video.That camera is already a few years old newer models can take even larger pictures. My camera, for example, creates images that are 4,288 by 2,848 pixels, which works out to 12,041,344, or a little over 12 megapixels. When a digital camera takes a picture, it is recording what it sees in pixels - lots and lots of pixels. The screen above would be 2.3 megapixels, but we generally don’t refer to display devices that way. If you do the math, the screen has 2,304,000 pixels - a little over 2.3 million.Ĭamera people like to call numbers like that megapixels. That’s referred to as the resolution of the device: a measure of how many pixels the device is capable of displaying. The rectangle is so many pixels wide (horizontally) and so many pixels high (vertically).įor example, one screen I use is a rectangle that is 1,920 pixels wide and 1,200 pixels high, or simply “1920 × 1200”. We can do things with that dot, like give it a color, and I’ll get to that in a moment, but at its most fundamental level, a pixel is nothing more than a single dot.Ĭomputer display devices, like the screen on which you’re reading this, is nothing but a rectangle of pixels. PixelĪ pixel (short for “picture element”) is a dot. We’ll start by defining two terms: pixel and resolution. You can make images smaller by resizing, cropping, and/or adjusting compression settings. When you share an image that is too big in terms of resolution, it can be awkward for the recipient to view. Sharing a file that is too big in terms of file size can result in long or slow page displays and downloads, or email being rejected for being too large. The relationship between the two is affected by both lossy and lossless compression algorithms used when saving the image. Another measure of size is the amount of space in bytes required to store the file of the image on disk. One measure of size is an image’s resolution, which measures pixels (or dots) horizontally and vertically 1920 × 1200 pixels, for example.
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