HOWTO Capture and Process an Image of Jupiter

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turfpit
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HOWTO Capture and Process an Image of Jupiter

Post by turfpit » Tue Sep 25, 2018 9:56 pm

The attached tutorial guide for Jupiter covers:
  • Image capture with SharpCap
  • Stacking the capture video with Autostakkert
  • Registax and wavelet processing
I hope people find this document useful - all comments welcome.

[Note: the attached PDF document has been compressed. If text in an image is unclear, then use the zoom or magnify facility in your PDF reader to see the text clearly.]

Dave
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JupiterCapture - v2.compressed.pdf
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descott12
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Re: HOWTO Capture and Process an Image of Jupiter

Post by descott12 » Fri Jan 04, 2019 4:38 pm

Hello,
Since Registax can stack and do the wavelet processing, can we not skip using Autostakkert? Just trying to simplify the workflow and reduce the number of apps to learn. I have used Registax and it seems to work pretty well but I am wondering if Autostakkert maybe stacks better...
Thank

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turfpit
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Re: HOWTO Capture and Process an Image of Jupiter

Post by turfpit » Fri Jan 04, 2019 7:13 pm

Dave
Since Registax can stack and do the wavelet processing, can we not skip using Autostakkert?
Yes you can - it is a personal choice.

Why do I use Autostakkert for stacking and Registax for wavelets?

Quite simply because having attended Lunar and Planetary workshops by world class planetary imager Damian Peach,
http://www.damianpeach.com/ , he used Autostakkert for stacking and Registax for wavelets processing.

Autostakkert can do more:
  • Image Calibration - create and apply master dark and master flat. I find the integral flat is handy when processing lunar images.
  • Sharpen a stacked image, which sometimes is good enough and no further software needed.
  • 64-bit version available - faster processing and less likely to run out of memory with big files. Registax is 32-bit (last time I looked).
  • Multiple SER files can be stacked by selecting the files and dragging and dropping onto the Open button.
  • Has some interesting experimental features.
These 2 images were produced using only Autostakkert to carry out the stacking and sharpen the stack.
https://www.astrobin.com/358993/B/?nc=user , used a red filter (Wratten #25).
https://www.astrobin.com/358994/B/?nc=user , used an IR685 filter.
[Note: the revisions were created after attending the Damian Peach lunar imaging workshop for the second time.]

The document uses aggressive wavelet settings mainly to demonstrate the features of Registax. Hope you found the document useful - I learned a lot writing it. Jupiter is rising now around 05:00 UK time (January 2019).

Dave

descott12
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Re: HOWTO Capture and Process an Image of Jupiter

Post by descott12 » Fri Jan 04, 2019 8:09 pm

Hi Dave,
Yes the doc was very useful. The wavelet sliders were (and still are) a bit of mystery but at least I have a starting point now.
Just need those planets to get closer again...
Thanks
Dave

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turfpit
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Re: HOWTO Capture and Process an Image of Jupiter

Post by turfpit » Fri Jan 04, 2019 8:46 pm

Cheers Dave.

Have a look at viewtopic.php?f=7&t=211. For that Jupiter image, in Registax, Layer 2 slider was set to ~20. That was the only Layer used. There should be some useful capture/process info in there for you as the capture was done with a Celestron C8. For lunar/planetary, I always set the offset/brightness/black level to the minimum allowable setting in order to achieve the 'whale shaped histogram ' for log selected, see https://docs.sharpcap.co.uk/3.2/#Using% ... %20Quality.

The layers are to do with pixel radius:

Layer 1 => small pixel sharpening
.
.
layer 6 => larger pixel sharpening

and are related to Unsharp Mask radius setting in PhotoShop or GIMP. I have seen (older) imaging books where sharpening was done in Photoshop.

Planets were low here at 53N in 2018 so no real chance to improve on 2017's efforts. Maybe this year .....

Some Saturn info here viewtopic.php?f=16&t=256, same approach as Jupiter. Expect to have to use a high gain to get something. For general entertainment, here is my first ever image of Saturn (first ever image actually). It took me 3 nights to get it on the camera sensor :(
saturn.PNG
saturn.PNG (20.81 KiB) Viewed 56 times
First time using a telescope, using a 2x barlow (reduced brightness and FOV), red dot finder/scope not aligned :lol:

One year later
Saturn2small.png
Saturn2small.png (34.53 KiB) Viewed 52 times

Persistence is the key …


Dave

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