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Space Exploration & the Cosmos
NASA Mars Helicopter: Ingenuity Team Spun Up for Upcoming Flight 30
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<blockquote data-quote="MODAT7" data-source="post: 238972" data-attributes="member: 13649"><p>Last year I scanned a few very old photos of my parent's wedding. Needless to say, the photos had discolored over the decades, but were mostly fixable (to my surprise) by chroma renormalizing each channel. Looking at the Mars picture above, one of the little voices in my head said "that desperately needs to be renormalized".</p><p></p><p>So... Downloading the image, going into GIMP, Levels filter, selecting each red, green, and blue channel independently, then moving the little level triangles, white to the edge of the bright peak, black to the edge of the dark range, then boosting gamma to 1.20 to make the image a little less dark, and here's what turned up:</p><p></p><p>Original Image:</p><p></p><p>[ATTACH=full]15370[/ATTACH]</p><p></p><p>Renormalized Image:</p><p></p><p>[ATTACH=full]15371[/ATTACH]</p><p></p><p>Interesting???</p><p></p><p>Looking at a few other images at the end of that article, this is closer to ground color of some of the orbital shots. Too bad there isn't a color reference chart in the image...</p></blockquote><p></p>
[QUOTE="MODAT7, post: 238972, member: 13649"] Last year I scanned a few very old photos of my parent's wedding. Needless to say, the photos had discolored over the decades, but were mostly fixable (to my surprise) by chroma renormalizing each channel. Looking at the Mars picture above, one of the little voices in my head said "that desperately needs to be renormalized". So... Downloading the image, going into GIMP, Levels filter, selecting each red, green, and blue channel independently, then moving the little level triangles, white to the edge of the bright peak, black to the edge of the dark range, then boosting gamma to 1.20 to make the image a little less dark, and here's what turned up: Original Image: [ATTACH type="full"]15370[/ATTACH] Renormalized Image: [ATTACH type="full"]15371[/ATTACH] Interesting??? Looking at a few other images at the end of that article, this is closer to ground color of some of the orbital shots. Too bad there isn't a color reference chart in the image... [/QUOTE]
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NASA Mars Helicopter: Ingenuity Team Spun Up for Upcoming Flight 30
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