5 Ways to Stretch your Image in PixInsight

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  • Опубликовано: 8 сен 2024

Комментарии • 34

  • @EM-sx6jn
    @EM-sx6jn 2 года назад

    Great explanation. Thanks!

  • @anata5127
    @anata5127 2 года назад

    I do similar to last one. But, it has 4-5 additional steps involving mask for bright point, mask for background, use hue and saturation functions etc.
    Your image is great. Good dynamic range,
    Now, you could try similar photo for

    • @JoesAstrophoto
      @JoesAstrophoto  2 года назад

      Those are great tips Ana, I’ll have to try that out!

    • @anata5127
      @anata5127 2 года назад

      @@JoesAstrophoto I try to be very mild on stretching. I move pick lest at 1/8 position on histogram no further. If picture still have background, then not enough subs and very short exposure. Rest goes via multiple mask and manipulations.

  • @olivierrethore9097
    @olivierrethore9097 3 года назад

    Very interresting to present different methods for a same function in Pix! I like this idea. Thanks for the video

    • @JoesAstrophoto
      @JoesAstrophoto  3 года назад

      Thanks Olivier, if you can tell, I'm more versed in some than others, but I thought it would be good to at least show everyone all the ways I could find. Some said there were even a few more. It's good to know all the tools at your disposal. Thanks for watching and commenting too!

  • @JonnyBravo0311
    @JonnyBravo0311 3 года назад +2

    Weird that my comment disappeared. Thanks for sending me the email letting me know, Joe! My comment was about a few other methods for stretching available in PI that I use:
    1. The EZ scripts by Dark Archon. Specifically, the EZ Soft Stretch. This method can work spectacularly well. It can also fail spectacularly. When it works, though... "EZ" is right.
    2. ArcsinhStretch. This is probably the most color-protecting stretch available in PI. Works really well in combination with MaskedStretch. Also allows you to REALLY dial in your black levels. Gives you a visual representation of what you're clipping.
    3. Good old fashioned CurvesTransformation. You can stretch using this method and if you're used to PS/Gimp, you're used to using curves tools to stretch.
    The other thing I mentioned was regarding stretching using the STF and the HistogramTransformation. I like to use an unlinked stretch. That will treat each of the channels separately and can bring out some more colors that might be lost in a linked stretch.

    • @JoesAstrophoto
      @JoesAstrophoto  3 года назад

      Thanks for reposting Jonny, a lot of great info in your post, and more for me to try out! I have the EZ scripts and have used some but haven’t tried soft stretch yet.

    • @JonnyBravo0311
      @JonnyBravo0311 3 года назад

      @@JoesAstrophoto with the EZ Soft Stretch, I typically start with the default settings, but inevitably start tweaking. The biggest issue I have with it is that it seems to be all too happy to clip the shadows. However, when it doesn't clip anything, it produces a very nice result.

  • @IcemanAstro
    @IcemanAstro 3 года назад

    Joe thank you for this video! I just took up learning Pixinsight and your video truly helped me. Thank you!

  • @Astrobloke
    @Astrobloke 3 года назад

    Very informative Joe. I am guilty of mainly using the auto screen stretch but as I learn more about pixinsight less so. I like the masked stretch personally and is what i tend to use from now on

    • @JoesAstrophoto
      @JoesAstrophoto  3 года назад +1

      I like the masked stretch as well, but always find myself using the histo transform.

  • @HeavenlyBackyardAstronomy
    @HeavenlyBackyardAstronomy 3 года назад

    Another great tutorial Joe. I usually do most of my stretching in Photoshop after I initially do a background elimination in PixInsight.

    • @JoesAstrophoto
      @JoesAstrophoto  3 года назад

      Thanks Pat, I started with Photoshop until I got PixInsight. Now I do almost everything with PixInsight, but I still have to do some stuff in Photoshop, it seems like you really need them both.

  • @RussellsAstrophotography
    @RussellsAstrophotography 3 года назад

    Great video again Joe. Thanks for the tips! I only knew a two of these methods, so going to try rest soon! The masked stretch looked like it gave great results.

    • @JoesAstrophoto
      @JoesAstrophoto  3 года назад

      Thanks Russell, I like masked stretch as well. I think it does even better with rgb images.

  • @RigoFromSpain
    @RigoFromSpain 3 года назад

    Again nice tutorial Joe, keep them coming

  • @thewarhenk
    @thewarhenk Год назад

    And now we have GeneralizedHyperbolicStretch as well. Initially skeptical, I’m using it more and more. Most of my images have been STF/HT, but I will occasionally use MaskedStretch for the chrominance of low-resolution nebulae. GHS is time consuming and requires at least two iterations, but again, I’m liking it, Joe!

    • @JoesAstrophoto
      @JoesAstrophoto  Год назад

      Thanks Warren, I mostly just stretch with HT, but I'll use MaskedStretch on occasion.

  • @Steve_The_Ignorant_Astronomer
    @Steve_The_Ignorant_Astronomer 3 года назад

    I always used the stf function , that's the way I started doing it but then I saw people doing the histogram transformation and I tried it and like it better. I don't know if there is any difference but it is more fun for me so I am using the Histo method

    • @JoesAstrophoto
      @JoesAstrophoto  3 года назад

      I agree Steve, maybe that’s why it’s my favorite way as well.

  • @AstroSoundscape
    @AstroSoundscape 3 года назад

    Nice summary Joe whilst I'm not using Pixinsight yet I know where to go for this. 👍

    • @JoesAstrophoto
      @JoesAstrophoto  3 года назад +1

      Thanks Ollie, I see PixInsight in your future 😜

    • @AstroSoundscape
      @AstroSoundscape 3 года назад

      @@JoesAstrophoto I'm gonna need a new ssd to plug into my own brain first.🤣

  • @jean-marclemoine9636
    @jean-marclemoine9636 3 года назад

    Hi.
    Nice video.
    Usually I begin with script MaskedStretch and then Histogram Transformation not the process MaskedStretch.
    But it’s true there are a lot of way to do that.
    Thank’s and clear skies (new subscriber to your channel).
    JM

  • @di0x7c5
    @di0x7c5 3 года назад

    Hi Joe! Nice presentation, congrats. Personally i like to use autohistogram stretch first to get background at the required levels and then using mask or further stretch to get the details from lighter areas. Maybe this is not quite good according "good practices", but the results are satisfied for me.

    • @JoesAstrophoto
      @JoesAstrophoto  3 года назад +1

      Thanks Dariusz, I’m not sure most of the way I use stuff in astrophotography is according to best practices either, but I think it’s what works for us is the best way, not always of course, but it’s fun.

  • @dmoug1
    @dmoug1 2 года назад

    This is frustratating at the 13:36 mark you click on something to show that actual graph of the histogram. I cant get it to show in the either of the boxes.

    • @JoesAstrophoto
      @JoesAstrophoto  2 года назад +1

      Sorry to hear you’re having trouble Dave, when doing a histogram stretch make sure you first have the image you’re trying to stretch selected then open histogram transformation, then click the little check mark on the lower right, next to the reset, x, button. This should lock in the image and show the histogram. Hope this helps.

    • @dmoug1
      @dmoug1 2 года назад

      @@JoesAstrophoto thanks joe

  • @randallpatrickc
    @randallpatrickc 4 месяца назад

    Music drove me away - sorry