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Topics - Jan

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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.

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>

This post does not comply with the gallery board rules.
Please use this forum board to post only images processed exclusively with PixInsight.

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.

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!

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:-)


(the image i am talking about: )

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.

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...)

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

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.

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:

General / Pixinsight 32bit made intentionally useless?
« on: 2013 August 12 05:12:29 »
I am using Pixinsight on my W7 64 for processing, but I have older W7 32 notebook for the equipment control. I know W32 is not supported, but I do not understand why some functions of the W32 Pixi were removed totally. It would be VERY useful for me (and I belive also for other gentleman) to have at least screen transfer function for the fast check, even respectivelly of aligned and integrated lights. Unfortunatelly there are also curves and histogram functuons missing, so basically the Pixi on my old notebook is useless. I belive it would not be big deal to keep at least one of the above mentionned functions working on the obsolete 32 bit pixi.

Thanks to the Pixi team for answer.

Gallery / NGC 7023
« on: 2013 April 14 10:53:59 »
Hi guys, recently I have tried to reprocess my older data of this jewel in Cepheus.

Taken in May 2012 in southern France, in the region of Grandes Causses at about 1000m altitude.
TS/GSO AG 200/F4 with ASA 2KORRR 0,73 resulting in F2,9
Canon 450D Astrodon modified
Gemini G53F mount guided by Lacerta on Megrez 72
28x5 min./ ISO800
No folters
Processed Pixinsight only

I did not use too much noise reduction, because to my eye images look more natural with a bit of noise than with muddy details and lack of mircostructures, sorry for that. Maybe I just did not discover all features of Pixinsight yet, working on it;)

« on: 2013 April 12 11:26:05 »
Hi guys, I have a small problem here. I normally use batch preprocessing script. Suddenly, the resulting calibrated images have really strange colours - shifted towards the red and when I align channels eg in histogram transform, the result has neutral, but slightly shifted colours, very hard to saturate and when saturated, it is just not it. I tried to reset al values to default, but did not help.

I have to ad, that i have precessed this data before and there was no problem (now i just wanted to experiment with value settings and integration settings..). Also I took another data from other folder and everything was fine, result was awsome. Does anyone have idea what can be the problem? THANKS!

Bug Reports / 1.8 RC5 crashes when closing image Windows 7
« on: 2013 March 28 09:06:43 »
Hi guys, although the new version of Pixinsight is very nice and I am very happy with it, I am experiencing frequent application crash when closing the image (message "Program stopped working, wait...."). With previous version I did not experience this, only with the yesterday released RC5. 

I have W7 64, loads of RAM and HDD space.

Gallery / Orion jewels, M42, M42 and others
« on: 2013 January 16 09:48:18 »
My weekend attempt of the M42, taken with 200mm F4 newtonian with ASA corrector 0,73x.

12x8 minutes /ISO200
15x10s/ ISO200
Canon 450D modified Astrodon
Gemini G53F mount

Processed in DSS (calibration and combination)
Pixinsight - histogram, backround, curves of the color channels separatelly, local histogram adjustments etc
PS - combined in layers. i am missing the layer feature in Pixinsight.

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