New Hi-res Jupiter Maps from Cassini |
New Hi-res Jupiter Maps from Cassini |
Mar 27 2006, 02:07 PM
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#1
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Member Group: Members Posts: 648 Joined: 9-May 05 From: Subotica Member No.: 384 |
-------------------- The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
Jules H. Poincare My "Astrophotos" gallery on flickr... |
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Mar 27 2006, 03:43 PM
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#2
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
THAT's cool! thanks for the heads up.
Now I'm going to sit back and see what cool tricks our UMSF colleagues can do with this image. Anyone for a high res rotating spherical projection gif? -------------------- If Occam had heard my theory, things would be very different now.
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Mar 27 2006, 04:55 PM
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#3
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
Now I'm going to sit back and see what cool tricks our UMSF colleagues can do with this image. Anyone for a high res rotating spherical projection gif? Quick and dirty with Celestia. This is fairly heavily jpeg reduced but you get the idea. It's quite a nice map and the two small white oval storms that have subsequently become Red Junior /Oval BA are nicely visible. Looks pretty cool alright spinning around. I'd post a video but avi's ain't allowed. |
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Mar 27 2006, 08:57 PM
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#4
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Quick and dirty with Celestia. This is fairly heavily jpeg reduced but you get the idea. It's quite a nice map and the two small white oval storms that have subsequently become Red Junior /Oval BA are nicely visible. Looks pretty cool alright spinning around. I'd post a video but avi's ain't allowed. Darn if I don't owe you another beer, dude. Nice, very nice. -------------------- If Occam had heard my theory, things would be very different now.
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Mar 27 2006, 09:47 PM
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#5
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IMG to PNG GOD Group: Moderator Posts: 2251 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
Sorry to spoil the party but I made an even higher resolution map (7560x3780 pixels) several months ago. I just added a smaller version (2880x1440 pixels) of it to my website. Also the color balance of my map is probably more realistic, at least compared to what Jupiter looks like to me through a telescope. However, Jupiter's color is somewhat subjective.
And this may be nitpicking but the claim that the CICLOPS maps "are the most detailed global color maps of Jupiter ever produced" is obviously false . Even the full-size version of the map I made back in 2002 based on Voyager 2 images is bigger (5040x2520 pixels) . Several renderings based on these maps can be seen on my Jupiter page. |
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Mar 30 2006, 07:16 PM
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#6
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Senior Member Group: Members Posts: 1649 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Also the color balance of my map is probably more realistic, at least compared to what Jupiter looks like to me through a telescope. However, Jupiter's color is somewhat subjective. Several renderings based on these maps can be seen on my Jupiter page. Hello Bjorn, I was wondering if there's any simple way to modify the colors of some of the Cassini Jupiter releases to make them appear like your more realistic color renditions? -------------------- Steve [ my home page and planetary maps page ]
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Mar 30 2006, 11:23 PM
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#7
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IMG to PNG GOD Group: Moderator Posts: 2251 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
Since I did my map from calibrated PDS images the details of the processing will be different but here is a quick and dirty way of modifying a well known image:
Replace the red channel (CB2) with a new synthetic image: CB1syn = 1.106251 x (0.774 x CB2 + 0.226 x BL1) Combine this with the green and blue channels into a new color composite. Modify the color balance of the color composite to make the NEB whitish by multiplying red with 1.022 and green with 1.095. IMO this results in some improvement but the colors are not identical to my map. One reason is that the calibrated blue PDS images are darker than the blue image in this example so you'll need to vary the exact values of the parameters used when making CB1syn (probably increase the weight of CB2). When making the map I had to make a synthetic green color channel but it was close to the average of CB2 and BL1 so I didn't replace the green channel in this example (I think in the CICLOPS images the exact average of CB2 and BL1 is used for green). I'm attaching the resulting image. |
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