Voyager 2 imaging of Triton |
Voyager 2 imaging of Triton |
Nov 7 2021, 07:30 PM
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#76
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Member Group: Members Posts: 127 Joined: 15-April 21 Member No.: 9009 |
By no means is doing this with images that someone has already processed for another purpose the best way to proceed. Whatever artifacts they may have introduced at very low values (0, 1, 2) is part of what you're trying to make something of now. There are multiple obvious artifacts and there's no accounting therefore for what is artifact and what isn't. Never with work like this should you begin with an image that someone posted after performing undocumented processing to the original. all the images on USGS PILOT are low resolution, and are full of jpeg artifacts, witch destroys any detail from potential neptuneshine or atmospheric haze lit terrain (same goes for PDS Image Atlas) so where can i go to get original unprocessed images that doesn't have jpeg artifacts and is a good resolution |
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Nov 7 2021, 07:38 PM
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#77
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
so where can i go to get original unprocessed images that doesn't have jpeg artifacts and is a good resolution https://pds-imaging.jpl.nasa.gov/volumes/voyager.html has the raw images in PDS format. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Nov 7 2021, 07:48 PM
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#78
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Senior Member Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 |
so where can i go to get original unprocessed images that doesn't have jpeg artifacts and is a good resolution This thread itself, if you go back to the beginning, is full of information useful to the topic at hand, including a link to: http://www.unmannedspaceflight.com/index.p...mp;#entry138447 which has more links to more information. In general, this board is incredibly informative if you focus on the text as well as the images. Photoshopping the images you find is never going to be as informative as reading and following up on all of the discussion, which has already spoken to some of your questions. If you find something interesting in the nth post of a thread, consider reading posts #1- (n-1) in that thread. |
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Nov 7 2021, 10:51 PM
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#79
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Member Group: Members Posts: 127 Joined: 15-April 21 Member No.: 9009 |
https://pds-imaging.jpl.nasa.gov/volumes/voyager.html has the raw images in PDS format. where do i find the triton images though, and can gimp open that format, i use GIMP not PS |
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Nov 7 2021, 11:12 PM
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#80
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
where do i find the triton images though, and can gimp open that format, i use GIMP not PS You are going to have to do some of this work yourself. Google is your friend. The PDS is thoroughly documented. There are many tools available to process the products it has. The PDS has search tools. http://bjj.mmedia.is/utils/img2png/ is what you will probably want to turn PDS published data into something GIMP can open. |
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Nov 8 2021, 01:39 AM
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#81
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
where do i find the triton images though... Maybe in the triton subdirectories? The image names that when into the mosaics are shown at the bottom of the mosaics. Honestly you have this a lot easier than I did in 1981 when I saw my first Voyager data on 6250 bpi magnetic tapes. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Nov 8 2021, 02:24 AM
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#82
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
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Nov 9 2021, 11:55 AM
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#83
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Member Group: Members Posts: 127 Joined: 15-April 21 Member No.: 9009 |
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Nov 9 2021, 02:40 PM
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#84
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
i think that " img2png" can open Voyager pds images
however i use ISIS4 on them |
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Nov 9 2021, 09:51 PM
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#85
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Member Group: Members Posts: 127 Joined: 15-April 21 Member No.: 9009 |
i think that " img2png" can open Voyager pds images however i use ISIS4 on them i am trying to find a 32 bit program of img2png, but i can't seem to find one, although google said "IMG2PNG is now a 64 bit program (earlier versions were 32 bit). This was a necessary change to make it possible to convert extremely large images, in particular 46080x23040 pixel LRO DEMs" where can i find the previous versions that are 32 bit so i can try the program on triton |
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Nov 10 2021, 12:34 AM
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#86
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Member Group: Members Posts: 427 Joined: 18-September 17 Member No.: 8250 |
... where can i find the previous versions that are 32 bit so i can try the program on triton You could take a look at the old version from the Internet Archive http://web.archive.org/web/20190430175504/.../utils/img2png/ |
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Jun 20 2022, 01:20 PM
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#87
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Member Group: Members Posts: 349 Joined: 20-June 07 From: Slovenia Member No.: 2461 |
Recently data from the article by Schenk et al. 2021 became available here.
I played around with stereo DEM data to create this maps, one showing the whole extent, the other close up of Kibu Patera area with contours. There are a lot of (sublimation?) holes visible in the terrain, that were not so obvious in photo only renderings. I guess this elevation dataset is all that will be available for a very long time... |
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Jun 20 2022, 01:22 PM
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#88
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Member Group: Members Posts: 349 Joined: 20-June 07 From: Slovenia Member No.: 2461 |
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