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Lion Nebula SH2-132 - RC71

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Posts Made By: Alan Friedman

February 10, 2006 06:54 PM Forum: CCD Imaging and Processing/Solar System

Saturn Storm February 9-10, 2006

Posted By Alan Friedman
Hi Jim -

seeing: good
image: three thumbs up!!

congratulations on catching some steady sky.

best,
Alan

February 11, 2006 06:03 PM Forum: CCD Imaging and Processing/Solar System

Jupiter, Feb 11

Posted By Alan Friedman
Bravo Anthony! On my monitor the first image is a bit more natural in processing, the second a little more detailed from sharpening - both are excellent.

As many have said, this will be the southern hemisphere's apparition of Jupiter - I look forward to following it through your images.

best -
Alan

February 11, 2006 06:57 PM Forum: CCD Imaging and Processing/Solar System

Just an experiment!

Posted By Alan Friedman
Hi Luca -

I think it's a fine mosaic. I have made a number of full disk lunar images and I am always trying to make one a little better than the last. I thought the image a little dark overall perhaps the histogram can be stretched some?

best,
Alan

February 12, 2006 03:03 AM Forum: CCD Imaging and Processing/Solar System

Jupiter, Feb 11

Posted By Alan Friedman
Anthony -

I hope you will forgive my playing with your image. I don't expect to have data this good for many years! The detail shown in your red and green images inspired me to try a technique I used quite a bit last apparition - using red and green to make a luminance overlay for the RGB composite.

I sharpened the red and greed just a tad more than you had. I also blurred the very edge of the planet's disk a small amount with gaussian blur.

Let me know what you think of this variation.

Again - thanks for posting this great image.

Alan


February 12, 2006 03:09 AM Forum: CCD Imaging and Processing/Solar System

Schickard, Wargentin, and Phocyldes

Posted By Alan Friedman
Hi Mike -

Very nice result. I think many of us could have hibernated through this winter without missing much. Nice to see you back and posting new images.

Alan

February 12, 2006 05:10 PM Forum: CCD Imaging and Processing/Solar System

APOD for Alan Friedman - Congrats

Posted By Alan Friedman
Thanks Tom. I enjoyed your image from the day before too. Jim Misti's fantastic data is making quite a splash of beautiful pictures out there.

cheers-
Alan

February 15, 2006 02:41 PM Forum: CCD Imaging and Processing/Solar System

More Saturn Storm

Posted By Alan Friedman
Great work, Jim - that shadow on the rings is growing fast!

Alan

February 18, 2006 03:49 AM Forum: CCD Imaging and Processing/Solar System

A few of my better video streams

Posted By Alan Friedman
Hi Wes -

These are really great to see. The compressed files still leave an excellent representation of the quality of the original video. The saturn video is much like the one I captured that very good night in 2004. The difference is that yours is so nicely exposed where my ToUcam files were very dim and too noisy (I sometimes still have this problem - what looks good on the monitor at night turns out to be way underexposed the next day).

One of the things that struck me about saturn in very good seeing is how the Cassini division appears. It is often unnaturally wide in images due to heavy processing - but in very fine seeing it appears much the same - evenly black and sharp at its edges. Really a beautiful thing to see.

Thanks for sharing these great movies -

Alan

February 23, 2006 03:25 AM Forum: CCD Imaging and Processing/Solar System

Saturn February 20, 2006

Posted By Alan Friedman
Nice work Ed - I'm looking forward to seeing more images with your new DMK camera.

best,
Alan

February 23, 2006 07:47 PM Forum: CCD Imaging and Processing/Solar System

Question for Paolo and/or others HELP!

Posted By Alan Friedman
I have seen the same pattern from time to time on images captured with my DMK camera. I do not see it in the raw frames but it is very evident after many frames are stacked. It is not improved at all by using the de-interlace filter in Photoshop.

I find it occurs mostly in saturn images where the frames are on the dim (and noisy) side. Perhaps there is a grid pattern inherent in the chip that is being picked up in the stacking routine due to a low signal level in the image and accetuated by the stacking? It seems not to be a problem when the S/N values are better.

Alan


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