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  2. Image compression - Wikipedia

    en.wikipedia.org/wiki/Image_compression

    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.

  3. Transfer printing - Wikipedia

    en.wikipedia.org/wiki/Transfer_printing

    Printing on enamel probably began around 1753 (a letter of Horace Walpole dated 7 September 1755 mentions a printed Battersea box), and by around 1756 his process was being used on some Bow porcelain, although the results were not excellent, perhaps as the glaze was "too soft and fusible", giving a tendency to blur the image. The colours of the ...

  4. Texture compression - Wikipedia

    en.wikipedia.org/wiki/Texture_compression

    Texture compression is a specialized form of image compression designed for storing texture maps in 3D computer graphics rendering systems. Unlike conventional image compression algorithms, texture compression algorithms are optimized for random access. Texture compression can be applied to reduce memory usage at runtime.

  5. Lossy compression - Wikipedia

    en.wikipedia.org/wiki/Lossy_compression

    Composite image showing JPG and PNG image compression. Left side of the image is from a low-quality JPEG image, showing lossy artefacts; the right side is from a PNG image. In information technology, lossy compression or irreversible compression is the class of data compression methods that uses inexact approximations and partial data ...

  6. Color Cell Compression - Wikipedia

    en.wikipedia.org/wiki/Color_Cell_Compression

    The primary difference between Block Truncation Coding and Color Cell Compression is that the former was designed to compress grayscale images and the latter was designed to compress color images. Also, Block Truncation Coding requires that the standard deviation of the colors of pixels in a block be computed in order to compress an image ...

  7. Snappy (compression) - Wikipedia

    en.wikipedia.org/wiki/Snappy_(compression)

    Compression speed is 250 MB/s and decompression speed is 500 MB/s using a single core of a circa 2011 "Westmere" 2.26 GHz Core i7 processor running in 64-bit mode. The compression ratio is 20–100% lower than gzip. [5] Snappy is widely used in Google projects like Bigtable, MapReduce and in compressing data for Google's internal RPC systems.

  8. Mug - Wikipedia

    en.wikipedia.org/wiki/Mug

    A mug of coffee with cream. A mug is a type of cup, [1] a drinking vessel usually intended for hot drinks such as: coffee, hot chocolate, or tea. Mugs usually have handles and hold a larger amount of fluid than other types of cups such as teacups or coffee cups. Typically, a mug holds approximately 250–350 ml (8–12 US fl oz) of liquid. [2]

  9. Wikipedia : Image quality requirements

    en.wikipedia.org/wiki/Wikipedia:Image_quality...

    Some possible requirements are: An image must clearly be recognized as portraying what it is supposed to at the size provided in the article; An image must clearly be recognized as portraying what it is supposed to at its maximum resolution to which it can be enlarged on the screen; An image must appear to plausibly be what it is portraying ...

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