Jump to content


PixInsight - My new favourite tool: History Explorer

Recommended Posts

I was watching a few YouTube videos last night by pomfretvids, and he was using the History Explorer to show how he stepped through from one stage to the next. He could go back to a particular stage and the image would change to reflect what it looked like at that stage in the processing. Quite cool I thought, if I need to go back a few stages I can see exactly what tools I have run, but not really a killer feature.

Then this evening I was reprocessing M42 (again), and I got almost to the end and I realised that I had dark halos around my stars. Having a quick look on line it turns out that the culprit is often Masked Stretch, and the cure is to run it with more iterations. Bother thinks I, that was about 10 processing steps ago. If I go back to before the Masked Stretch and re-run it with more processing steps that will cause it to lose all of the history after that, and I was happy with the rest of the processing steps.

Then I notice that the History Explorer has one of those little triangular "New Instance" buttons. If you drag this new instance button onto the PI desktop, then you get a process icon. If you expand this process icon, all of your processing steps, including all of the parameters and the masks used are all stored in a Process Container.

So I was able to remove all of the steps before the Masked Stretch, edit the parameters of the Masked Stretch step in the Process Container; then Use the History Explorer to step back to before the Masked Stretch. Then I could just run the Process Container and it executed all of the steps from the stretch on.

You can also execute each step, one at a time by double clicking on it in the Process Container. Oh happy day! Of course I am still not happy with my processing of M42 and I will have to start over from scratch again ;)

  • Like 3
Link to comment
Share on other sites

PixInsight does remind me of the old point and click adventure games like Monkey Island or Zak McKracken, in that you have to click on everything in every posible combination. Most of the time the results are boring, but every now and again something wonderful happens and you unlock a whole new area to play in ;)

  • Like 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Ollyb
      15 hours Integration
      Redcat 51
      AZ EQ6R Pro
      ASI1600mm Pro
      Processed in DSS, Pixinsight & Photoshop 

    • By bottletopburly
      Startools 1.8 is  currently under development, Ivo is  currently working a Narrowband Accent" module  for duo band users , initial image Ivo has posted certainly looks interesting https://forum.startools.org/viewtopic.php?f=4&t=2225&start=10 Ivo also working on a new deconvolution algorithm so some good things for Startools users to look forward too .
    • By Lee_P
      Hi SGL Hive Mind,
      I’ve got a real head-scratcher of a problem, and I’m hoping someone here can help me solve it. I’ve been experimenting with seeing the effects of increasing integration time on background noise levels. My understanding is that the greater the total integration time, the smoother the background noise should appear. But I’m finding that beyond one hour of integration, my noise levels see no improvement, and even maintain the same general structure.
      I flagged this in another thread but think it deserves its own thread, so I thought I’d begin anew.
      I figure either my understanding of integration and noise is incorrect, or maybe I’ve messed up something in pre-processing. I’ve conducted a lot of tests with different settings, copied below, but nothing seems to make much difference. I’ve uploaded my data to GDrive, in case anyone’s feeling generous with their time, and would care to see if they get the repeated noise pattern!  (Being GDrive, I think you need to be logged into a Google account to access).
      My telescope is an Askar FRA400, and the camera is a 2600MC-Pro. All a series of 120-second images shot from Bortle 8 skies. For each test, I applied some basic functions in PixInsight just to get images to compare: ABE, ColorCalibration, EZ Stretch, Rescale to 1000px. I used SCNR to remove green from the first tests, but forgot that step for the second batch.
      Any idea what's going on? Why isn't the noise smoothing out past the one hour mark?

      Here are my PixInsight ImageIntegration settings:

    • By Lee_P
      Hi SGLers,
      I’m hoping a PixInsight guru can help me. I’m a PI beginner, but am having fun learning. My question is about the level of noise in my images. After integrating and performing an STF stretch, the resulting image always looks quite smooth. But it doesn’t take long at all – just a DBE really, maybe then a gentle stretch – for the image to become really noisy. And then a lot of my editing is centred on battling that noise. My camera is an ASI2600MC-Pro, which I cool to -10. For a recent experiment, I gathered 20 hours of data from 120s subs. With that much integration time, and the low-noise camera, I was hoping for lower noise than I actually got. (I am shooting from Bortle 8, however).
      So my question is: are my expectations wrong, and actually the amount of noise I have is what’s to be expected? Or, have I messed something up in pre-processing or integration?
      In case it’s useful, I ran SCRIPT -> ImageAnalysis -> Noise Evaluation on the image straight out of integration and got the following:
      Ch | noise | count(%) | layers |
      0 | 2.626e-01 | 18.39 | 4 |
      1 | 1.037e-01 | 12.01 | 4 |
      2 | 1.636e-01 | 11.10 | 4 |
      I’ve also uploaded the file (1.16Gb) for anyone kind enough to help investigate further:
    • By EMG
      Recently I bought a ZWO ASI178MM for planetary/lunar/deep-sky imaging and last weekend i had clear skies so I was able to capture videos of the moon in two panels. I have already processed the videos in AutoStakkert, I used 3x drizzle because I intend to print the image so now I have two 120MB TIFF images that i would like to combine in a two panel mosaic. I tried doing it in Hugin, a free panorama stitcher but the program crashes due to the file sizes being too large. I have searched for tutorials on using DynamicAlignment in PixInsight but it seems to me that i'll need a reference image to be able to create mosaics in PixInsight. Is there any way to go about this, I feel like this should be a pretty straightforward job but I am not very experienced in PI so I would really appreciate some advice.
      I tried using DynamicAlignment as you can see in the attached screenshot but the result was just a cut version of the target image, aligned perfectly to the source image. It would be perfect if it didn't cut off the lower part of the target image.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.