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Processing the Viking Lander camera data [pdf]
- eliteraspberrie 11y agoYou can reproduce some of the image processing described here with software today. For example, in Figure 3, the histogram at the top right is a "periodogram" of the original image data. It shows that the original image is skewed towards the high end of the frequency spectrum. They apply a high-pass filter (discard the lowest frequencies) so the processed image shows higher details than the original. If you had the original photograph as an image file, let's say an image of the surface of Mars, [0] you could filter out the lowest ten frequency components with a Python script: [1] pip install avena avena filter high 10 pia19676-fig1_ml_mcam04403coloradjusted24bwscale.jpg The result: http://imgur.com/a/ASusx http://imgur.com/a/ASusx Notice the details are more visible. [0] http://www.nasa.gov/jpl/msl/pia19676/geological-contact-zone-near-marias-pass-on-mars http://www.nasa.gov/jpl/msl/pia19676/geological-contact-zone... [1] (shameless plug) https://github.com/eliteraspberries/avena https://github.com/eliteraspberries/avena
- mmd 11y agoThis mission was also interesting from onboard computing side. NASA history page has some cool info about that: http://history.nasa.gov/computers/Ch5-6.html http://history.nasa.gov/computers/Ch5-6.html
- jakeogh 11y agoAbout two years ago the Avaneya project released software that can decode the Viking Lander tapes. A few tapes contain images that were (as far as I know) never released. Beautiful results: https://gist.github.com/jakeogh/fa995a3277d500ab59b1 https://gist.github.com/jakeogh/fa995a3277d500ab59b1 There's even a very nice DVD which takes the included raw tape data and processes it: https://directory.fsf.org/wiki/Avaneya:_Viking_Lander_Remastered_DVD https://directory.fsf.org/wiki/Avaneya:_Viking_Lander_Remast...