Reprocessing Historical Images, Looking for REALLY big challenges? |
Reprocessing Historical Images, Looking for REALLY big challenges? |
Apr 21 2005, 11:26 PM
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Member Group: Members Posts: 123 Joined: 21-February 05 Member No.: 175 |
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Apr 27 2005, 10:49 AM
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
GregM and 4'th Rock are certainly on the right track. Both results, even if "quick and dirty" look quite decent The registration on the mariner 69 stuff is better than I expected. The "less red" color of Sinus Meridiani is certainly real.
Note that the Mariner 69 pictures exist in multiple versions. And both mission slewed the scan-platforms back to partially overlap the earlier imagery at a different phase angle. Mariner 7 also photographed overlapping coverage with Mariner 6 for comparison purposes. Residual image of the martian limb is visible in the Mariner 7 color version. Subtraction of an earlier limb image, or a shifted version of one image from itself should substantially reduce the @#$@# ghost of the limb. The best possible Mariner 4 work will be when somebody can scan and OCR the paper copies of the 6 bit pixel data lists "picture element matrices" in that Mariner 4 project final report volume. One of the more sophisticated, modern pixel interpolation techniques <not just bilinear or cubic convolution> image resampling would also help suck the most possible from the 200 x 200 images. The ultimate restoration of the Mariner 4 data would require some form of interpolation of the "contour lines" formed by the 6-bit digitization to synthetize pseudo-8-bit data. Nice work... keep at it!. |
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May 9 2005, 04:16 AM
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Interplanetary Dumpster Diver Group: Admin Posts: 4404 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Speaking of historical images, this is some work I did with some more recent historical images. It shows Europa and the Jovian rings. It is a mosaic of framelets from Galileo's C10 orbit. Europa appears multiple times within the sequence, but I edited that out. This shot gives you an idea of some of the Cassini-like shots Galileo might have send back had it not been sent across the country twice in a semi truck.
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