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You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
remove white background from star and bars (which usually take the background color rather than being white) 18:55, 12 September 2010 2,040 × 1,080 (955 bytes)
This image or file is a work of a U.S. Air Force Airman or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image or file is in the public domain in the United States.
Whiteout or white-out [1] is a weather condition in which visibility and contrast are severely reduced by snow, fog, or sand. The horizon disappears from view while the sky and landscape appear featureless, leaving no points of visual reference by which to navigate.
This image shows a flag, a coat of arms, a seal or some other official insignia. The use of such symbols is restricted in many countries. The use of such symbols is restricted in many countries. These restrictions are independent of the copyright status.
Image:Map of USA-bw.png – Black and white outlines for states, for the purposes of easy coloring of states. Image:BlankMap-USA-states.PNG – US states, grey and white style similar to Vardion's world maps. Image:Map of USA with county outlines.png – Grey and white map of USA with county outlines.
Low-visibility: Low-visibility roundel used in conjunction with air superiority grey schemes since the 1980s. Colours are known as "salmon pink" and "baby blue". Ratio 1:2 Low-visibility: Low-visibility roundel used on the Lockheed Martin F-35 Lightning II, with the centre being the same grey as the airframe. Unlike previous roundels, they are ...
To define visibility the case of a perfectly black object being viewed against a perfectly white background is examined. The visual contrast , C V (x), at a distance x from the black object is defined as the relative difference between the light intensity of the background and the object