Space/Science — HabitableZone

Space/Science » in reply to re: Near true-color images

Image processing humor

You really had me going with that image, SAIDias, because it looks so good, yet in reality it's soooo wrong. At first I wondered if it was a colorized mono image (see this thread below), but it's better than that, there's a sprinkling of real color in it. I tried this, that, and the other thing, till finally I compared the color histograms and discovered that you made it backward: L6(blue filter)=red and L4(orange)=blue.

The proper filter order does look pretty bizarre, but it seems like the plain around Eagle crater has lots of the bluish-grey stuff we saw inside the crater:

http://rovers.habitablezone.com/gallery/opportunity/color/055/images/L4_L5_L6_sat-45_lum-20_512.jpg


The clue that this is a somewhat reasonable set of colors is that churned-up soil has a more reasonable beige tint to it. The consensus is that the blue in the images is generally too intense, but it's really there, a little bit, anyway. Most images benefit from cranking down saturation about 45% (like the above) to mitigate the effect somewhat.

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