Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | (show all)
mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Learning PixInsight
      #5738115 - 03/17/13 07:49 AM

Besides Harry's video tutorials..., are there any decent step-by-step instructions that someone completely new to PixInsight could use from start to finish for astro image processing? Thx

Post Extras: Print Post   Remind Me!   Notify Moderator  
terry59
Post Laureate
*****

Reged: 07/18/11

Loc: Colorado, USA
Re: Learning PixInsight [Re: mmalik]
      #5738120 - 03/17/13 07:55 AM

http://www.ip4ap.com/

Post Extras: Print Post   Remind Me!   Notify Moderator  
bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: Learning PixInsight [Re: mmalik]
      #5738123 - 03/17/13 07:56 AM

Yes, have a look at IP4AP website here.

It's not free though.


Post Extras: Print Post   Remind Me!   Notify Moderator  
mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: Learning PixInsight [Re: bilgebay]
      #5738129 - 03/17/13 08:04 AM

Thanks Terry/Sedat; I was looking for something like I... and Scott... have produced, free/practical online instructions. Thx

Post Extras: Print Post   Remind Me!   Notify Moderator  
terry59
Post Laureate
*****

Reged: 07/18/11

Loc: Colorado, USA
Re: Learning PixInsight [Re: mmalik]
      #5738133 - 03/17/13 08:08 AM

There are a number of those on the PI site

Post Extras: Print Post   Remind Me!   Notify Moderator  
hytham
Pooh-Bah
*****

Reged: 12/25/12

Loc: Canadian in the US
Re: Learning PixInsight [Re: terry59]
      #5739074 - 03/17/13 04:42 PM

Rogelio Bernal Andreo aka my freaking inspiration.

http://www.deepskycolors.com/tutorials.html


Post Extras: Print Post   Remind Me!   Notify Moderator  
bluedandelion
Carpal Tunnel
*****

Reged: 08/17/07

Loc: Hazy Hollow, Western WA
Re: Learning PixInsight [Re: hytham]
      #5739234 - 03/17/13 05:45 PM

Harry's tutorials are the best. Add to that a basic workflow as follows and you are on your way

Stack (calibrate+integrate) -> crop boundaries
Gradient removal and color correction (DBE, Color calibration, SCNR)
Noise removal via Atrous Wavelets
---
Stretch - Histogram transfer (levels)
HDR wavelets to increase dynamic range
LHE Local contrast enhancement
ACDNR, Nose reduction
Saturation Boost via curves

The dashed line separates the first three steps you do on linear data. The latter are done on stretched and therefore non-linear data. Harry has a tutorial for each of these major steps. I do these steps (in addition to others) on every single image I process.

Ajay


Post Extras: Print Post   Remind Me!   Notify Moderator  
srosenfraz
Post Laureate
*****

Reged: 03/06/11

Loc: United States
Re: Learning PixInsight [Re: hytham]
      #5739591 - 03/17/13 08:32 PM

Quote:

Rogelio Bernal Andreo aka my freaking inspiration.





Ditto.


Post Extras: Print Post   Remind Me!   Notify Moderator  
kbev
super member


Reged: 12/29/10

Loc: Far, far east Mesa
Re: Learning PixInsight [Re: terry59]
      #5740007 - 03/18/13 02:31 AM

Quote:

There are a number of those on the PI site



+1, in particular I have this one bookmarked so I can refer to it as needed when processing images: Processing a M45 DSLR image There are others dealing with using specific PI processing tools but as a general overall flow I like referring to this one to help me learn to navigate PI.


Post Extras: Print Post   Remind Me!   Notify Moderator  
mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: Learning PixInsight [Re: kbev]
      #5740051 - 03/18/13 03:30 AM

Thanks hytham/Ajay/Scott/Kevin.

Ajay, your outline is very helpful for someone completely new to this; exactly what I was looking for at this time.

Everyone, this is just a start; will have more specific questions as I try tackling PixInsight. Keep the discussion going, keep your feedback coming, and let's get more granular as we more forward. If possible and if all goes well, I would like to come up with an instructions doc with your help. Regards


Post Extras: Print Post   Remind Me!   Notify Moderator  
bluedandelion
Carpal Tunnel
*****

Reged: 08/17/07

Loc: Hazy Hollow, Western WA
Re: Learning PixInsight [Re: mmalik]
      #5740432 - 03/18/13 10:43 AM

You are welcome Mike. I myself started with a basic outline from another imager I know (Rainycityastro on CN). One thing I left out is Morphological Transform to reduce stars.

Most of my DSLR images were captured with Nebulosity and I saved the images as compressed FITS. Pixinsight's stacking routine has problems with this. So with these images I do calibration and stacking with the new batch process facility in Neb and then move to PI for registration and final stacking.

PI can handle these files if you first convert them, but that takes a while.

Rogelio's site has some great bits of information too, but Harry teaches you the nuts and bolts of various controls in PI with examples.

Ajay


Post Extras: Print Post   Remind Me!   Notify Moderator  
guyroch
Vendor (BackyardEOS)
*****

Reged: 01/22/08

Loc: Under the clouds!
Re: Learning PixInsight [Re: bluedandelion]
      #5740446 - 03/18/13 10:52 AM

I just bought Part 1 and Part 2 from IP4AP .

I really need all the help I can get for PixInsight... powerfull... but steep learning curve.

Guylain


Post Extras: Print Post   Remind Me!   Notify Moderator  
hytham
Pooh-Bah
*****

Reged: 12/25/12

Loc: Canadian in the US
Re: Learning PixInsight [Re: guyroch]
      #5741954 - 03/18/13 10:29 PM

Quote:

I just bought Part 1 and Part 2 from IP4AP .

I really need all the help I can get for PixInsight... powerfull... but steep learning curve.

Guylain




Just keep on playing with it and you will come to discover that all of your thoughts about its difficulties were a slight exaggeration. I started learning both PS and PI at the same time and quite honestly I prefer the work flows in PI and I absolutely love the scripting aspect of it - so much control. It's fantastic.

You'll never look back

If you have not already signed up on the PI Forums, do so immediately. Wealth of information!


Post Extras: Print Post   Remind Me!   Notify Moderator  
harry page 1
sage


Reged: 07/25/09

Re: Learning PixInsight [Re: hytham]
      #5742385 - 03/19/13 07:55 AM

Hi
what can I do to help make the basics better to understand

Always open to suggestions

Harry


Post Extras: Print Post   Remind Me!   Notify Moderator  
jsines
sage
*****

Reged: 09/06/11

Loc: Berkley. Michigan
Re: Learning PixInsight [Re: harry page 1]
      #5743016 - 03/19/13 01:49 PM

Quote:

Hi
what can I do to help make the basics better to understand
Always open to suggestions
Harry




Hi Harry - thanks for popping up here, I really appreciate your videos/tutorials. They've helped me come a long way in my processing skills. I bought PI about 6 months ago, but I still feel like a newbie.

One item I'm noticing in the tutorials and the videos is the focus on CCD cameras over DSLR cameras. I'm using a modded Canon 450D, I'm shooting inside a white zone, and I'm having a lot of issues dealing with noise. I feel I've got DBE and ABE down, but noise keeps frustrating me. I've read all the threads on the PI forum about noise, but I always seem to overdo it on the noise reduction and end up with lumps.

Not sure if you have the equipment or if someone else can point me to the tutorial, but I'd like to see more examples of processing with DSLRs in bad conditions. The data in the tutorials I've watched/read is so clean to begin with compared to my DSLR exposures, it looks like Hubble data.

(I know I also have my own issues about expecting too much data in the little imaging time I get, but I'm working on that. I must repeat - I can't get 6 hours of data out of 1 hour of imaging time. )

Thanks!


Post Extras: Print Post   Remind Me!   Notify Moderator  
harry page 1
sage


Reged: 07/25/09

Re: Learning PixInsight [Re: jsines]
      #5743152 - 03/19/13 02:54 PM

Hi
I can assure you that I shoot my images from a very orange place:)
we all have to learn to get the best from our images and data , where ever taken .

Could you let me have some of your data and let me look at it and see if I can help
Harry


Post Extras: Print Post   Remind Me!   Notify Moderator  
mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: Learning PixInsight [Re: harry page 1]
      #5743178 - 03/19/13 03:05 PM

Quote:

what can I do to help make the basics better to understand




Quote:

Add to that a basic workflow as follows and you are on your way

Stack (calibrate + integrate) -> crop boundaries
Gradient removal and color correction (DBE, Color calibration, SCNR)
Noise removal via Atrous Wavelets
---
Stretch - Histogram transfer (levels)
HDR wavelets to increase dynamic range
LHE Local contrast enhancement
ACDNR, Nose reduction
Saturation Boost via curves

The dashed line separates the first three steps you do on linear data. The latter are done on stretched and therefore non-linear data. Harry has a tutorial for each of these major steps. I do these steps (in addition to others) on every single image I process.






Harry, thanks for offering to help; greatly appreciated!


For the start, above is a high-level outline by Ajay if you could validate which I am pretty sure would be agreed upon succession and totality of basic processing steps. Once we have this high-level workflow laid down, then we can get into the details and granularity of each in methodical manner. Look forward to your validation and/or suggestions? Regards


Post Extras: Print Post   Remind Me!   Notify Moderator  
harry page 1
sage


Reged: 07/25/09

Re: Learning PixInsight [Re: mmalik]
      #5743270 - 03/19/13 03:40 PM

Hi

Yes its about right , but of cousre there may not be a need for hdr wavlets or lhe , depends on your image

And of course sometimes less noise reduction is better than too much

Harry


Post Extras: Print Post   Remind Me!   Notify Moderator  
jsines
sage
*****

Reged: 09/06/11

Loc: Berkley. Michigan
Re: Learning PixInsight [Re: harry page 1]
      #5743295 - 03/19/13 03:51 PM Attachment (48 downloads)

Thanks for the offer to help, Harry. The data is on the Rosette Nebula, I posted an inquiry thread in the Image Processing Challenges subforum over at the PixInsight forum explaining my problem. I posted all the lights, the master dark, the master bias, and the master flats on the pixinsight server under the jsines folder. I'm in between light pollution filters because I went from a 1 1/2 inch adapter to a 2 inch adapter to get rid of vignetting. The Astronomik CLS should arrive tomorrow.

I don't mean to cross streams here by referencing another forum, not sure if it's allowed. :P

From the pixinsight post -

* Orion ED80T
* Orion Sirius mount, unguided
* Canon 450D, modded, using a 2 inch adapter
* 50 x 120 second lights at 400 ISO (1 hour, 40 minutes) over 3/3/13 and 3/4/13
* 20 darks at 400 ISO
* 20 flats at 100 ISO
* 100 bias
* stacked and processed in PixInsight
* imaged in a white zone

This is probably processing attempt #6, and I'm still not completely happy with it. I don't know what I can do or if I can do anything. I started imaging at the meridian and imaged until it was about 25 degrees from the horizon. I'm at 42 degrees North in the US. I'm in a white zone, so I'm wondering if that's an issue.

* stacked using the BatchPreProcessing script - I ended up with average SNR increases of 14, 16, and 13 (RGB)
* integrated using windsorized sigma clipping
* cropped
* used Dynamic Alignment to match a jpeg image from the APOD website to the cropped image as a guide for DBE. I probably put about 10-15 DBE samples in the whole image.
* then processed as I usually do - AtrousWavelets, Background Neutralization, Color Calibration, Histogram, SCNR, ACDNR, HDRWavelets, Histogram, Curves, Histogram, LHE, etc.

I couldn't exactly get the red like I wanted, it's probably over-saturated, and I see I need a field flattener. I'm also wondering if it's a combination of using a dslr and imaging in a white zone that's preventing me from getting a better image. I'm also totally open to the idea that I messed up somewhere. I've tried this object like 3 times over the past few months, and I've ended up throwing it all out because I'm not getting anything good enough to show anyone.

Attached is the best I've been able to come up with so far, and I'm not sure how to proceed - I'm totally open to feedback.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Alfredo Beltran
sage


Reged: 08/01/10

Loc: Bogota, Colombia
Re: Learning PixInsight [Re: jsines]
      #5743505 - 03/19/13 05:25 PM

I've used this tutorial with good success. It's in Spanish but you can follow it. Has a lot of useful information.

Best regards

Alfredo


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | (show all)


Extra information
6 registered and 23 anonymous users are browsing this forum.

Moderator:  Dave M, WOBentley, tecmage 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 11130

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics