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For example, the photosensitiser radical anion can react instantaneously with molecular oxygen (3 O 2) to generate a superoxide radical anion (O 2 • −), which can go on to produce the highly reactive hydroxyl radical (OH•), initiating a cascade of cytotoxic free radicals; this process is common in the oxidative damage of fatty acids and ...
The species of salmon can be remembered through the fingers on the hand: chum is the thumb, sockeye is your index finger (like poking someone in the eye), king is your middle finger (the largest of the fingers), silver is your ring finger, pink is the pinky finger.
The size of animated images is judged less strictly, though larger is still preferred. Further information on image size can be found here. Exceptions to this rule may be made where justified on a case-by-case basis, such as for historical, technically difficult or otherwise unique images, if no higher resolution could realistically be acquired.
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{{POTD/{{#time:Y-m-d}}|row}}: This has the image and caption encapsulated in (usually) a single table row. This is the version used on the current Main Page. It is also possible to permanently feature a POTD for a selected day. Just add a specific value for the date you want. For example, today's picture of the day is {{POTD/2025-02-22|image ...
This is an example of a color RGB image stored in PPM format. (Not shown are the newline character(s) at the end of each line.) Image (magnified) P3 # "P3" means this is a RGB color image in ASCII # "3 2" is the width and height of the image in pixels # "255" is the maximum value for each color # This, up through the "255" line below are the ...
For example, if an algorithm is looking for a face, its template eigenspaces may consist of images (i.e., templates) of faces in different positions to the camera, in different lighting conditions, or with different expressions (i.e., poses). It is also possible for a matching image to be obscured or occluded by an object.
In 1995, Greg Spencer presented Physically-based glare effects for digital images at SIGGRAPH, providing a quantitative model for flare and blooming in the human eye. [ 5 ] In 1997, Paul Debevec presented Recovering high dynamic range radiance maps from photographs [ 6 ] at SIGGRAPH, and the following year presented Rendering synthetic objects ...