May 25, 2004
This image of ejecta (top-left) from a rampart crater was acquired March 3, 2003, during northern summer. The THEMIS VIS camera is capable of capturing color images of the martian surface using its 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 the use of 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.
Topics: Technology Internet, Optical filters, Impact craters, Planetary science, Crater Ejecta, Rampart Crater, Grayscale, Photographic filter, Filter, Image sensors