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An image scaled with nearest-neighbor scaling (left) and 2×SaI scaling (right) In computer graphics and digital imaging, image scaling refers to the resizing of a digital image. In video technology, the magnification of digital material is known as upscaling or resolution enhancement.
An image size can be changed in several ways. Consider resizing a 160x160 pixel photo to the following 40x40 pixel thumbnail and then scaling the thumbnail to a 160x160 pixel image. Also consider doubling the size of the following image containing text.
In the examples above, the size of the image is scaled based on each user's default image size, which can be changed at Special:Preferences. Setting image size in pixels, such as "250px", would override the user's preference and display the image as 250px wide for all users who view that image on that page.
Original image to be made narrower Scaling is undesirable because the castle is distorted. Cropping is undesirable because part of the castle is removed. Seam carving. Seam carving (or liquid rescaling) is an algorithm for content-aware image resizing, developed by Shai Avidan, of Mitsubishi Electric Research Laboratories (MERL), and Ariel Shamir, of the Interdisciplinary Center and MERL.
Resizing an animated GIF image will significantly reduce its quality, without any reduction of download time. When there are two or more "size" options of the same type, only the last one is valid. However, if both an upright and an absolute size are used together, the absolute size always takes precedence, regardless of where it appears in the ...
Although upright=1.1 and 240px do the job equally well for the common case where the default width is 220 pixels, many of the users who set the default width to 300 pixels to work better with their high-resolution screens will be annoyed with 200px because it will make the picture a third smaller than their preferred size.
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