New Horizons Jupiter Encounter Options

[JRehling]

That's a more catchy description than the one where the 1970's era newscaster pronounced Io as "ten."

While we're off topic, I'll add that a high school history teacher told me that one of his students referred to Malcolm X as "Malcolm the Tenth".

[ustrax]

Is that even Io?

Don't ask me...

This is the original image I've used.

[volcanopele]

Don't ask me...

This is the original image I've used:

AHHH, now I understand. The moon on the left (which is the one I think you were looking at) is Ganymede. The moon on the right, still to the upper left of Jupiter is Io.

At this point, LORRI just doesn't have the resolution to pick out individual volcanic centers. NH can see large scale albedo features, like Bosphorus and Colchis Regiones, and the dark material surrounding Isum Patera, but at such low resolution, you can't really see small scale features.

I should try to calculate the resolution for the Io image.

[volcanopele]

For comparison, rotate Ustrax's sharpened image 90 degrees clockwise (or there abouts) and compare to this simulated view from the Solar system simulator:

http://space.jpl.nasa.gov/cgi-bin/wspace?t...=1&showsc=1

The bright spot at upper right in Ustrax's sharpened view is caused by the bright rays radiating from the crater Osiris.

[ustrax]

The bright spot at upper right in Ustrax's sharpened view is caused by the bright rays radiating from the crater Osiris.

Is this more like it volcanopele?

Now let me see what can we get from REAL Io...

EDITED:
Here's what I got from Io, probably just an artifacts from sharpening.
volcanopele, could you get us an Io image centered in the marked feature(and, BTW, what's the name of it?)?

[ugordan]

Are you sharpening the image before or after the enlargement? It seems like artifacts from too much sharpening applied afterwards?

[ustrax]

Are you sharpening the image before or after the enlargement? It seems like artifacts from too much sharpening applied afterwards?

First I crop the area in which I'm interested, then convert it into a new bitmap, which softens it a lot, and from then, I sharpen it and reduce moiré as many times as needed.

[ugordan]

What do you mean by it softens it alot? By moiré what exactly do you mean? Edge ringing? I wouldn't really sharpen the images beyond the point of trying to reverse the point spread function, which is 1.5 pixels FWHM. I tend to use Photoshop's smart sharpen filter with radius 0.7-0.8 pix and it gives good results. Any more processing could "introduce" details, not bring them out.

[ustrax]

What do you mean by it softens it alot? By moiré what exactly do you mean? Edge ringing? I wouldn't really sharpen the images beyond the point of trying to reverse the point spread function, which is AFAIK 1.5 pixels. I tend to use Photoshop's smart sharpen filter with radius 0.7-0.8 pix and it gives good results. Any more processing could "introduce" details, not bring them out.

Man! If you, who are able to speak about radius and point spread functions are asking me what moiré is then how the hell should I know?!


It's just a function in my good old CorelDraw...
Maybe I should start calling it "the-tool-that-creates-detais-which-resemble-a-lot-with-surface-features-in Jupiter's-Moons"

[ugordan]

Hehe
The obvious problem I see are those vertical/horizontal bars that appear and those are clear signs you did the sharpening after the resize. By softening up I guess you mean Corel Draw (why even use it for a purpose like this!) magnifies the crop and then you end up enhancing resize algorithm artifacts.
And no, I have no idea what Corel's moiré removal does!

[ustrax]

Hehe
The obvious problem I see are those vertical/horizontal bars that appear and those are clear signs you did the sharpening after the resize. By softening up I guess you mean Corel Draw (why even use it for a purpose like this!) magnifies the crop and then you end up enhancing resize algorithm artifacts.
And no, I have no idea what Corel's moiré removal does!

enhancing resize algorithm artifacts
Man...That's worst than greek to me..that's...Ionian...
So...There's is no chance of that marked Io feature be what I thought?

Now...seriously...the moiré removal tool as similar effects to the noise removal one.

Don't you dare to doubt by good old buddy software!
He helped me finding even unexisting features such as abysses...
Imagine what Lowell could have done with CorelDraw...

[volcanopele]

Ustrax, what ugordan is trying to say is that many of the features you see in your sharpened view were introduced by the sharpening process. In other words, they are not real. There are simply not enough pixels to be seeing features on the scales you are seeing in your image. Sure, I would like to, but we just have to be a little more patient.

[ugordan]

Here's my take on the latest Io image. It flips between the LORRI image and Sol. Sys. Simulator image. Magnified 4x:

[Ant103]

It's just a try to make an anaglyph with NH images
(the relief is not so pronounced...).

[ustrax]

Here's my take on the latest Io image.

That's is very nice!
Always a pleasure to learn from someone who REALLY knows what is doing.

EDITED: Could you do the same with Ganymede?