File:Pal Crater - False Color (PIA26057).jpg
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The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image.
Summary
editDescriptionPal Crater - False Color (PIA26057).jpg |
English: The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations of the surface not easily identified in a single band image. Today's false color image shows part of the rim and floor of Pal Crater. Pal Crater is located in Promethei Terra and is 71km (44 miles) in diameter. The THEMIS VIS camera is capable of capturing color images of the Martian surface using five different color filters. In this mode of operation, the spatial resolution and coverage of the image must be reduced to accommodate the additional data volume produced from using multiple filters. To make a color image, three of the five filter images (each in grayscale) are selected. Each is contrast enhanced and then converted to a red, green, or blue intensity image. These three images are then combined to produce a full color, single image. Because the THEMIS color filters don't span the full range of colors seen by the human eye, a color THEMIS image does not represent true color. Also, because each single-filter image is contrast enhanced before inclusion in the three-color image, the apparent color variation of the scene is exaggerated. Nevertheless, the color variation that does appear is representative of some change in color, however subtle, in the actual scene. Note that the long edges of THEMIS color images typically contain color artifacts that do not represent surface variation. Orbit Number: 89879 Latitude: -31.6241 Longitude: 109.014 Instrument: VIS Captured: 2022-03-19 22:27 https://photojournal.jpl.nasa.gov/catalog/PIA26057 |
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Date | Taken on 15 August 2023 | ||
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Author | NASA Jet Propulsion Laboratory / NASA/JPL-Caltech/ASU |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ![]() |
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current | 01:30, 5 December 2023 | ![]() | 669 × 1,428 (94 KB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of http://images-assets.nasa.gov/image/PIA26057/PIA26057~orig.jpg via Commons:Spacemedia |
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