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Removal of non-free images. Shortcuts. WP:RFUI. WP:FUIR. The ninth item of Wikipedia’s policy for non-free content states that non-free images should only be used in the article namespace (not disambiguation pages), and goes further into the underlying reasons for the policy. This issue is important because copyright complaints are a very ...
Opening tends to enlarge small holes, remove small objects, and separate objects. Closing retains small objects, removes holes, and joins objects. A very important characteristic of a binary image is the distance transform. This gives the distance of every set pixel from the nearest unset pixel. The distance transform can be efficiently calculated.
Background radiation is defined by the International Atomic Energy Agency as "Dose or the dose rate (or an observed measure related to the dose or dose rate) attributable to all sources other than the one (s) specified. [1] A distinction is thus made between the dose which is already in a location, which is defined here as being "background ...
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Cosmic background radiation is electromagnetic radiation that fills all space. The origin of this radiation depends on the region of the spectrum that is observed. One component is the cosmic microwave background. This component is redshifted photons that have freely streamed from an epoch when the Universe became transparent for the first time ...
An eraser (also known as a rubber in some Commonwealth countries, including South Africa [1] [2] [3] from which the material first used got its name) is an article of stationery that is used for removing marks from paper or skin (e.g. parchment or vellum ). Erasers have a rubbery consistency and come in a variety of shapes, sizes, and colors.
Physical cosmology. The cosmic microwave background ( CMB or CMBR) is microwave radiation that fills all space in the observable universe. It is a remnant that provides an important source of data on the primordial universe. [1] With a standard optical telescope, the background space between stars and galaxies is almost completely dark.
Seyyed Ali Hosseini Khamenei (Persian: سید علی حسینی خامنهای, romanized: Ali Hoseyni Xāmene’i, pronounced [ʔæˈliː hosejˈniː xɒːmeneˈʔiː] ⓘ; born 19 April 1939) is an Iranian Twelver Shia marja' and politician who has served as the second supreme leader of Iran since 1989.
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