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 23 2005, 09:25 AM
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
The digital data for the final versions of <most?> of the Mariner 4 mars images are available in many university engineering or aerospace department libraries. *** IN PAPER COPY! *** The Mariner Mars 1964 Project Report <in multiple volumes> contained a volume entitled something like "picture element matricies", which contained PRINTOUTS of the 200 lines and 200 samples of 6 bit data for each processed image.
I've wanted for years to scan and OCR the data and make digital versions of the images, but ..... time and effort ..... Note that the mariner 4 images were taken in alternating red and green filters, with every third image not recorded. So the pictures are: green, red, missing, red, green, missing, green, red, missing etc. The corner of one image of each red/green pair OVERLAPPED by about 100 pixels, so there is some color data from the Mariner 4 images. All that was done for the final project report was not entirely accurate registration of the overlapping image segments and either differencing or ratioing of the images to separate color differences from brightness differences. Nothing was published in any form as a color picture from that data to my knowledge. |
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Apr 25 2005, 11:29 PM
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Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
QUOTE ... Note that the mariner 4 images were taken in alternating red and green filters, with every third image not recorded. So the pictures are: green, red, missing, red, green, missing, green, red, missing etc. The corner of one image of each red/green pair OVERLAPPED by about 100 pixels, so there is some color data from the Mariner 4 images. .... With this information I processed the scanned Mariner 4 images avaliable here http://nssdc.gsfc.nasa.gov/imgcat/html/mis...er_4_page1.html using the gray scale bars to "normalize" the images and resampling them to 200x200 pixels. Then I made mosaics from the image pairs and put them in a map by matching the visible surface features. I also used the overlaping Red / Green areas to generate a small color area inside the mosaics. I'm ataching a map with all the images and a mosaic. All this will be avaliable in my page soon! -------------------- _______________________
www.astrosurf.com/nunes |
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