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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.
The JPEG filename extension is JPG or JPEG. Nearly every digital camera can save images in the JPEG format, which supports eight-bit grayscale images and 24-bit color images (eight bits each for red, green, and blue). JPEG applies lossy compression to images, which can result in a significant reduction of the file size.
Microsoft Office Picture Manager (formerly Microsoft Picture Library [4]) is a raster graphics editor introduced in Microsoft Office 2003 and included up to Office 2010. [5] It is the replacement to Microsoft Photo Editor introduced in Office 97 and included up to Office XP .
Office 2010 Beta was a free, fully functional version and expired on October 31, 2010. [53] In an effort to help customers and partners with deployment of Office 2010, Microsoft launched an Office 2010 application compatibility program with tools and guidance available for download. [54]
Basic information theory says that there is an absolute limit in reducing the size of this data. When data is compressed, its entropy increases, and it cannot increase indefinitely. For example, a compressed ZIP file is smaller than its original, but repeatedly compressing the same file will not reduce the size to nothing. Most compression ...
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.
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