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Messages - Jan

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1
Gallery / Re: Rho Ophiuchi region mosaic
« on: 2015 February 21 12:46:37 »
You are right, that was my mistake to use incorrect place and post image where one step was made with other software.

But I do not see anything innapropriate on expressing my disappointment and naming Microsoft ICE (freeware) which did the job where Pixinsight did not (and I was really trying hard, I normally NEVER use anything else than Pixinsight).

And I do not see anything  <inappropriate>  saying, that that was my big, but first disappointment with Pixinsight. That is censorship over the "necessary" level.

Anyway, admins, feel free to remove this topic from gallery.

2
General / Mosaic problems
« on: 2015 February 21 12:38:44 »
I strongly hope my bellow words will not be found inappropriate as they were in another post I made elsewhere on Pixi forum.

I was trying several weeks (!) to make a four field mosaic with Pixinsight tools (Gradient Merge Mosaic processing). Unfortunatelly under ANY settings I did not get ANY usable results - I was always getting artifacts around bright stars in transition areas. The fiddling with the  settings just resulted in different level of the artifacts. I have seen the similar problem being discussed around, but I did not see any advice for real solution. I have seen an advice to remove the bright star from one of the two merged fields with clone tools.. I did not use this method as i find it totally against the philosophy of Pixinsight, which I like for clean mathematical solutions, no "painting" the image.

Here is the screenshot. The left image completelly processed with Pixinsight (unfinished...), the right image - channel combination in pixinsight, then I used another software (freeware) to stitch the TIFF files, and then reopenning Pixinsight and completing the processing.


3
Gallery / Re: Rho Ophiuchi region mosaic
« on: 2015 February 21 12:09:18 »
I am amazed by the level of censorship!

I am very enthousiatic user of Pixinsight, and I am referring to all my astro friends about the great value of the software. Why am I not allowed to express my opinion of one function or mention other software, which actually dealt with my problem with USABLE results??

I will be very happy if you explain why artifacts are happening with ANY settings with Gradient Merge Mosaic. Maybe also the link would be helpful instead of censoring.

The above was actually my reason for posting my image with the description.

4
Gallery / Rho Ophiuchi region mosaic
« on: 2015 February 21 07:40:26 »
Unfortunate with the weather last summer, I could not manage to get more than four fields of the intended Scorpio mosaic. Also I was quite disappointed by the Gradient Merge Mosaic, which did not result, under any combinantion of the settings, into the acceptable image. There was no way how to get rid of the artifacts around bright stars at the crossection. Finally I did try <text removed> just to put all the fields together and process in Pixinsight again, and it did work flawlessly. I can imagine though the science behind everything saying, that I have probably lost a part of the data quality (and I agree with that..) Anyway - after couple of years, I have to say Pixinsight did not meet my expectations, I have seen the described problem being discussed a lot around. <inappropriate>But still I am in love with Pixi!!!</inappropriate>

Anyway here you see the result (with acquisition details)

<link removed>

POST EDITED BY THE FORUM ADMINISTRATOR
This post does not comply with the gallery board rules.
Please use this forum board to post only images processed exclusively with PixInsight.

5
Gallery / Re: NGC5139 Omega Centauri
« on: 2014 May 31 14:46:15 »
I hope it will be ok, if I post my Omega Cen. to this topic, as it seems not to be personalized as the others.

The image was taken in Tenerife, so the object is only up to 15 degrees above horizon, and it is combination of data taken by 30cm newtonian (in Febuary 2014) and APO refractor for RGB channels (last week).

For acquisition details click the link bellow.
http://astrofotky.cz/gallery.php?show=Oko1/1401140938.jpg


6
Gallery / Rho Ophiuchi Region
« on: 2014 May 31 14:35:21 »
Hi guys, I was lucky enough to get a chance to have a full night session to take the image of part of Rho Ophiuchi from Montana Izana at Tenerife, at around 2400meters altitude. It was also first full test of my new instrument, SW Esprit 100/F5,5 reduced down to F4 with Riccardi reducer 0,75. Objects included in the image are IC4603, IC4605, BDN352+16, Collinder302 and many other.

For larger image and details click the thumb bellow.



I tried to do as few processing steps as possible, because I belive simple is better. Also i was testing some noise reduction functions in Pixinsight, trying to preserve the natural look of the image.

7
Bug Reports / File saving problem in latest update?
« on: 2014 January 28 07:39:38 »
Hi guys, I have experienced the problem with file saving on the two updates from last week.

During calibration (flat file), the calibrated sub-flats were stored where I wanted. Then the combined master flat- the process of saving the file into the specified folder was extremelly slow, about one minute at least (16mb). When i wanted to select the master flat for the light calibration, the file was not displayed available in the folder. But when I did try to OPEN the file normally in Pixi, the file was right there in the folder.

Another issue- when i then selected only one flat for calibration, and did calibrate set of lights just to see my flats were correct, they were written into the specified file with _c suffix as I specified, but when I did ask Pixi to register stars, the_r files were not created despite specified (or again remained unbisible), only _c files were in the folder.

I want to add that never before i had this kind of issue with older pixi versions.

Thanks for the advice, I have pretty nice set of data from last night at Izana mountain in Tenerife, and can ´t wait to see..;)

Many thanks!

8
Image Processing Challenges / MERGING Ha into LRGB
« on: 2013 December 21 01:32:38 »
Hi guys,

I would like to know your opinion how to merge Ha into the L channel especially. I took a shot of Alnitak region, and because Ha has more contrast and more details, I wanted to mix it into the L (well honestly the L was just synthetic from binned RGB channels). Of course the reflection nebula is not "bright enough" in Ha channel, and it ikind of makes difficult to get a pleasing result HaLRGB especially in this part of the image, it is kind of too dark. Can you advice "how to" with Pixinsight? I am not using any  image manipulation software like PSP, I prefer the Pixinsight work and I am almost sure it is possble to get what I want with Pixi, just do not know how:-)

Thanks!

(the image i am talking about: )

9
Gallery / Re: Helix nebula in bi-colour NB with RGB stars
« on: 2013 December 18 14:27:26 »
Very nice work, nothing to add:-) Congrats and looking forward to see more pictures!

10
Gallery / Re: M31 with RH200 and 16Mpx CCD
« on: 2013 December 17 12:05:26 »
Brilliant work, I would just nitpick one detail, which at least for me degrades a little bit the stunning picutre- the black point is black BLACK at your processings, by my taste I would appreciate to see a bit rised black point. With white point set slightly bellow and black slightly above the full range, you will get kind of more pleasing smoother appearance, and I am sure it will be one of the best M31 we all have seen:-)

11
Gallery / Messier 33
« on: 2013 December 16 15:49:27 »
Another test image from the sequence of the tests of my new astrograph. I need to fix couple of things, but anyway I am quite happy with the results. A lot of to learn with processing though.

http://www.astrobook.sk/vsetky-ccd-obrazky/?post=1762&rwd=1763&fwd=1761



AG 300/2,9 (mirror F4 reduced by ASA 2korrr)
545 min. L, 120 min. RGB, 60 min. Ha
Camera G2-8300 mono
Baader RGB, Astronon Ha 5nm
G53f guided with Lacerta Mgen2

Processed in Pixinsight, colour channels combined and processed intially by my frined (it took me too much time to realize the problem with registration algorythm of binned colour subframes...)

12
My new attempt for this amazing region of the skies, actually I took this image as one of the tests of my new astrograph.

http://www.astrobook.sk/vsetky-ccd-obrazky/?post=1761&rwd=1762&fwd=1751



Image details
AG 300/2,9 (mirror F4 reduced by ASA 2korrr)
250 min. Ha, 180 min. RGB
Camera G2-8300 mono
Baader RGB, Astronon Ha 5nm
G53f guided with Lacerta Mgen2

Processed 100% in Pixinsight.


13
Gallery / Re: Horsehead & Flame 4hrs RGB, 4hrs Ha
« on: 2013 December 16 15:36:06 »
Maybe if you horizontally flip the image, if it will look even better and more correct regarding the actual appearance of the object on the skies.

14
Gallery / Re: NGC 7023
« on: 2013 September 24 04:09:51 »
Hi Gerhard, thank you for your comment! (I am in your fan-club)

I have tried several methods how to "restore" morphologically transformed stars, but still I have found something crapy in the result. So I started to do my experiments wth pixel math - processing the copy of L channel separatelly and then merging in with the original L in pixelmath, finally combining them to LRGB. But it will need more efforts to get consistent and acceptable results. This was kind of first usable try:-)

 

15
Gallery / NGC 7023
« on: 2013 September 22 12:27:35 »
I am trying to find out how to reduce star intensity and develop more of the dark nebulae in the backround. With every photo since couple of months I try another technique, but none gave me satisfactory results. Only on this photo I belive I did reach usable result, hoping that this might be the way to go, using some of the advanced Pixinsight functions. My wish is to preserve the natural look of the stars as much as possible, no artifacts, no blurry discs shaved down my morphological transformation.



More details here: http://astrofotky.cz/~Oko1/1379876793.jpg

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