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Voyager mosaics and images of Jupiter, A fresh look at some ancient stuff
Ian R
post Nov 8 2010, 07:03 PM
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Here's a frame from the Voyager 1 approach movie that I'm (still) working on:

Attached Image


Io can be seen entering eclipse on the left.


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Ian R
post Nov 9 2010, 12:45 PM
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Bjorn,

I hope you don't mind, but I decided to have a go at running your Voyager 1 movie through a frame rate conversion filter: the result is pretty darn good, I'm sure you'll agree!

http://planetary.s3.amazonaws.com/misc/jup...1_sharp_MSU.avi
Reason for edit: Switched "megaupload" link for Amazon S3 link


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dilo
post Nov 9 2010, 05:26 PM
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Ian, could you upload a slightly compressed version directly in the forum? To me, access to megaupload site appear too complicated and boring... Thanks!


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elakdawalla
post Nov 9 2010, 05:28 PM
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Here you go, I've hosted Ian's tweened version of Bjorn's 16-frame Voyager 1's Jupiter approach animation on our server. It looks pretty awesome.


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tedstryk
post Nov 9 2010, 08:45 PM
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Wow!


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Bjorn Jonsson
post Nov 9 2010, 08:57 PM
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QUOTE (Ian R @ Nov 9 2010, 12:45 PM) *
Bjorn,

I hope you don't mind, but I decided to have a go at running your Voyager 1 movie through a frame rate conversion filter: the result is pretty darn good, I'm sure you'll agree!

http://planetary.s3.amazonaws.com/misc/jup...1_sharp_MSU.avi

Wow!!

Actually I was going to try doing something similar after seeing how machi processed his Hartley and Neptune animations using morphing but now it has been done for me smile.gif. It will be interesting to see a version of the animation similar to this one once I'm finished with all 66 frames of the animation (hardly going to happen this year - I'm working on something else). What software did you use?
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machi
post Nov 9 2010, 09:58 PM
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Fantastic!
Jupiter looks like if he's alive.

I have same question as Bjorn.
"What software did you use?"


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dilo
post Nov 10 2010, 02:28 PM
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QUOTE (elakdawalla @ Nov 9 2010, 06:28 PM) *
Here you go, I've hosted Ian's tweened version of Bjorn's 16-frame Voyager 1's Jupiter approach animation on our server. It looks pretty awesome.

Thanks Emily, it is really! Nice work, Ian/Bjorn. What about real frame rate / timespan of this movie? rolleyes.gif


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elakdawalla
post Nov 10 2010, 05:15 PM
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Well, since Bjorn started with 16 images with the red spot held still, I assumed that meant one image per Jupiter day. Ian's animation is 16 seconds long. So it's running at 1 Jupiter day per second, or 10 Earth hours per second.


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dilo
post Nov 10 2010, 08:07 PM
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Thanks Emily! smile.gif


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Ian R
post Nov 11 2010, 07:14 AM
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Morning all! cool.gif

I used the MSU Frame Rate Conversion Filter to 'tween' Bjorn's movie:

http://compression.ru/video/frame_rate_con...dex_en_msu.html

(BTW, thanks for introducing that term to me, Emily - I'd never encountered it until now.)

After installing AviSynth, I put together the following script, making use of the MSU filter:

CODE
DirectShowSource("jup_vgr1_sharp.avi")
Crop(0, 32, 0, -32)
ConvertToYV12().MSU_FRC(16, "slow")
ConvertToRGB24()

I then opened this script (basically just a notepad file with an 'avs' extension) in VirtualDub. All I did then was to change the frame rate from 128 fps to 20 fps.

Saving the movie as an Xvid AVI completed the process.


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Ian R
post Nov 19 2010, 04:13 AM
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Here's a couple of 'fixed longitude' sequences, which I've culled from the 1100+ frame Voyager 1 approach movie, and 'tweened' using the method described in the previous post:

http://www.youtube.com/watch?v=RdIfnymd9Aw&fmt=22


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machi
post Nov 20 2010, 04:30 PM
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Wonderfull animation Ian!

Finally I finished one of my Jupiter projects.
Animation from 9+1(synthetic) images (c1637840 - c1637928). Date 5.3.1979, time 3:28:36 - 4:07:00 UTC (timewarp 30). Images are rotated by 90.
jup_vg1_dam_004.avi


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Bjorn Jonsson
post Nov 23 2010, 10:08 PM
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I have just finished a completely new mosaic of the Great Red Spot (GRS), this time based on Voyager 2 images. First an enhanced, sharpened version and then a version that should have approximately natural color and contrast:

Attached Image

Attached Image


This is a 5x3 mosaic of images obtained on July 8, 1979 when Voyager 2 was ~1.45 million km from Jupiter. The resolution of the original images is ~14 km/pixel. The resolution of this mosaic is similar. This is a slightly higher resolution than in the Voyager 1 GRS mosaic I posted earlier in this thread. Each of the 15 frames making up the mosaic is a color composite from orange, green and violet images. This results in more accurate color than in my earlier Voyager 1 GRS mosaic because in that case I had no green images I could use. Thanks to this the color variations in this mosaic seem more interesting.

As far as I know this is completely new stuff. Very few and possibly none of the images I used have appeared earlier in official image releases, at least not in color. There is a fairly well known Voyager 2 mosaic of the GRS but that one is composed from images obtained three Jovian rotations earlier at a range of 2.6 million km (see http://photojournal.jpl.nasa.gov/catalog/PIA00065 ). Thanks to modern computers and software the quality of this new mosaic is higher.

As usual the mosaic was created by reprojecting the source data to simple cylindrical projection and then rendering the resulting map using a 'typical' viewing geometry (there is no single correct geometry because the source images were obtained over a period of ~70 minutes).

Thanks among other things to improvements I've made to some of the processing steps required to create these mosaics the geometric accuracy of this mosaic is higher than for the earlier Voyager 1 mosaic.

This new mosaic contains lots of interesting stuff, including small scale details and interesting color variations. Cloud shadows are visible, in particular at (3040,2040) and nearby. The color variations seem more interesting here than in the Voyager 1 mosaic, probably because the color is more accurate. There is an interesting brownish/orange 'band' near (1180,615) for example. Also the color changes from brownish to whitish near (900,1300) without any obvious changes to the 'texture' of the image (the wind is northnortheasterly at this location). I could name at least 10 additional features that look interesting to me and where I wish I knew what was happening.

The Voyager 1 images of Jupiter (and not the least the GRS) are probably better known than the Voyager 2 images, mainly because Voyager 1 arrived earlier. So yet again in a way I feel like I'm looking at images from a new Jupiter flyby. The GRS region looks more 'Galileo-like' to me in the Voyager 2 images than it does in the Voyager 1 images.
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ilbasso
post Nov 23 2010, 11:14 PM
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No words...should have sent a poet...

That is a stunning mosaic. There really aren't words to describe the beauty and complexity. You could get lost in that image for days. Congratulations and thanks for sharing!
Jonathan


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