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Featured pictures in Wikipedia. This star symbolizes the featured content on Wikipedia. This page highlights the finest images on Wikipedia. The featured picture criteria explains that featured pictures must be freely licensed or in the public domain, must be of a high technical quality, and must add significantly to at least one article on Wikipedia.
Scanned photos, for example, make use of a bitmap file format. Bitmap images are always limited in quality by their resolution, which must be fixed at the time the file is created. If the image is not rectangular, then it is saved on a default background color (usually white) defined by the smallest bounding rectangle in which the image fits.
Bing.com – Has an Advanced Image Search that offers images in different resolutions and also categorizes images. Allows free querying of the bing Image Search API up to a certain limit per day. Everystockphoto.com – Searching over 4.3 million public domain and creative commons photos including Wikipedia and NASA. Free user accounts with ...
The SSIM index is a full reference metric; in other words, the measurement or prediction of image quality is based on an initial uncompressed or distortion-free image as reference. SSIM is a perception -based model that considers image degradation as perceived change in structural information, while also incorporating important perceptual ...
Wikipedia:Picture of the day is an image which is automatically updated each day with an image from the list of featured pictures. The {{ POTD }} template produces the image shown above. Category:Wikipedia Picture of the day lists the different templates that can be used.
The processing quality of 12-bit images is considered high when the PSNR value is 60 dB or higher. [ 3 ] [ 4 ] For 16-bit data typical values for the PSNR are between 60 and 80 dB. [ 5 ] [ 6 ] Acceptable values for wireless transmission quality loss are considered to be about 20 dB to 25 dB.
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Fenton's pictures during the Crimean War were one of the first cases of war photography, with Valley of the Shadow of Death considered "the most eloquent metaphor of warfare" by The Oxford Companion to the Photograph. [13] [14] [s 3] Sergeant Dawson and his Daughter: 1855 Unknown; attributed to John Jabez Edwin Mayall [15] Unknown [e]