You need to upgrade your Flash Player The theme of this blog is not only and obviously space, but in particular “terrestrial worlds”, places that tend to have surfaces on which one could walk or at least attach oneself to. These places sometimes also have other earth-like familiar features such as atmospheres, weather, volcanos, geysers and perhaps, we are finding, even exotic oceans, rivers or lakes that are not necessarily made of familiar materials we are used to here at home. The second theme is imagery. Occasionally I do some retouching of images when needed if an image is incomplete or sometimes “dirty” or noisy. I will attempt to correct image shortcomings based upon other images or well-accepted presumed attributes. When this is done, notes will be offered as to what was added, why and sometimes how it was done. This way no one should ever wonder if something they are looking at is real or photoshop.

Near True Color From Phoenix

Phoenix Color by Gordan Ugarkovic

Near “true” color made by Gordan Ugarkovic using the only RED, GREEN and BLUE filtered images returned from the mission thus far. Additional adjustments were made by looking at the logo and the American flag (which we have an idea of what those color are supposed to look like) and adjusting the color of those items to appear as what we know are “true colors”. Logic then dictates that if those items are correctly balanced, then the Martian soil will also appear close to accurate.

12 Responses to “Near True Color From Phoenix”

  1. devicerandom Says:

    It would be interesting if both may discuss how did they arrive at the colorized image, so we can understand the protocols and possible traps of both.

    Also, to me, the USA flag colours look quite wrong in both versions. I suspect however they did use the flag and the probe as a known “standard”… I’d like to know how did that turn out.

  2. Gordan Says:

    Neither of these shots can really be called “true color” because they’re fudge jobs using raw data. Calibrated imagery needs to be used to get proper relative filter brightnesses and careful channel mixing due to filter wavelengths used.

    I was playing around with channels mixes to more-or less match the color image of the terrain released so far (even though that one was based on infrared and violet filters only) and match this image of the DVD: http://i195.photobucket.com/albums/z213/effinglibrarian/phoenix_dvd.jpg

    In particular, matching the colors of the Phoenix mission insignia.

  3. thomas Says:

    i figured that was why you both chose that image to work with. i’ll add language.

  4. Gordan Says:

    P.S. That’s the only full RGB set that’s down at the moment, actually. That’s why everyone’s been working with this view.

  5. thomas Says:

    So, wouldn’t the original post have been accurate? It says “near” true color. What would lead one to think this isn’t close to natural (other than the usual things that make all images not really true color)?

  6. Gordan Says:

    Well, because the two composites are obviously pretty different in color and especially contrast. Both can’t be right and neither probably is. This is as much a fudge-job as working with Cassini raw images are.

  7. Gordan Says:

    There’s now the official release of this scene and, oddly enough, there are TWO images released:

    http://www.nasa.gov/mission_pages/phoenix/images/press/SS001RAD896308599_10D10RABCT2_full.html
    http://www.nasa.gov/mission_pages/phoenix/images/press/S_001RAD_PER_S_10D10_RRGBM1.html

    Funny, isn’t it? :D

  8. devicerandom Says:

    Huh, where is the original post? The two images etc.

  9. thomas Says:

    based upon gordan’s remarks above… it really became a mute point to show both. essentially the missing one was stacked while gordan’s was stacked and adjusted. i was originally under the impression there was missing data and they both arrived at separate points working with available data. since it was not that involved… i didn’t want to compare and contrast.

  10. thomas Says:

    however, i would love to get something on here with one of the pros explaining in layman’s terms why there are such variations from one image of a body to another.

  11. devicerandom Says:

    Thank you thomas for the clarification.

  12. thomas Says:

    that is too funny that there are two images officially released.

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