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The simplest false-color encoding is to take an RGB image in the visible spectrum, but map it differently, e.g. "GBR→RGB". For traditional false-color satellite images of Earth a "NRG→RGB" mapping is used, with "N" being the near-infrared spectral band (and the blue spectral band being unused) – this yields the typical "vegetation in red ...
Color infrared aerial photographs are captured using false color film which changes the original color of different features into "false color". [2] [5] For example, grasslands and forests which are green in nature have a red color. [2] But some artificial objects which are covered in green may have a blue color. [2]
In this map, the two regions labeled A belong to the same country. If we wanted those regions to receive the same color, then five colors would be required, since the two A regions together are adjacent to four other regions, each of which is adjacent to all the others. A map with four regions, and the corresponding planar graph with four vertices.
A more sophisticated method involves use of a depth map (a false color image where color indicates distance, for example, a grayscale depth map could have lighter indicate an object closer to the viewer and darker indicate an object further away). [9]
A false-color satellite image of Kolkata, India, from Landsat 7 in 2004, showing rivers, vegetated areas, and developed areas A land cover map of the big island of Hawaii using 1999–2001 data from Landsat 7 , showing black lava flows from Mauna Loa , grayish dormant Mauna Kea , a plume of smoke from active Kilauea , dark green tropical ...
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The image modification process is sometimes called color transfer or, when grayscale images are involved, brightness transfer function (BTF); it may also be called photometric camera calibration or radiometric camera calibration. The term image color transfer is a bit of a misnomer since most common algorithms transfer both color and shading ...
In the early morning hours of Dec. 26, 1996, Patsy Ramsey called 911 to report her 6-year-old daughter JonBenét missing, and found a rambling ransom note left inside their Boulder, Colorado, home.