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Compression of an image to reduce file size (in Kb) is usually "lossy" and is not advised for featured pictures. Image compression will reduce download times and save disk space, but it does so at the expense of fine detail and overall image quality. If in doubt, when saving JPEG files, always select the "maximum" quality setting.
Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission. Algorithms may take advantage of visual perception and the statistical properties of image data to provide superior results compared with generic data compression methods which are used for other digital data.
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Data compression aims to reduce the size of data files, enhancing storage efficiency and speeding up data transmission. K-means clustering, an unsupervised machine learning algorithm, is employed to partition a dataset into a specified number of clusters, k, each represented by the centroid of its points.
Original file (SVG file, nominally 2,000 × 900 pixels, file size: 182 KB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Thus, a representation that compresses the storage size of a file from 10 MB to 2 MB yields a space saving of 1 - 2/10 = 0.8, often notated as a percentage, 80%. For signals of indefinite size, such as streaming audio and video, the compression ratio is defined in terms of uncompressed and compressed data rates instead of data sizes:
Upload file; Special pages ... Original file (SVG file, nominally 900 × 600 pixels, file size: 30 KB) ... 900 × 600 (29 KB) HapHaxion: reduce file size: 23:59, 27 ...
Upload file; Special pages ... Original file (SVG file, nominally 900 × 976 pixels, file size: 369 KB) ... 900 × 976 (369 KB) HapHaxion: reduce file size: 11:22, 14 ...
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