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Image Processing, a Series by Nik Szymanek

1 year ago
8
This series of tutorials guides us through image processing techniques developed by Nik Szymanek. You can practice these techniques with the associated images provided. Click on "Associated dataset" to download them.
SPECIFICATIONS
Tutor .......................................................................................................................................................................................................................... Nik Szymanek
Parts .......................................................................................................................................................................................................................... 9 videos
Duration .......................................................................................................................................................................................................................... 2h 13m
Level .......................................................................................................................................................................................................................... Standard
Software used .......................................................................................................................................................................................................................... FITS Liberator, Photoshop, PixInsight

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PART 1
Data Visualization with PixInsight
1 year ago
8
Data Visualization with PixInsight
PART 1
Data Visualization with PixInsight
12 minutes
PixInsight Registration and Stacking
PART 2
PixInsight Registration and Stacking
12 minutes
Guide to FITS Liberator
PART 3
Guide to FITS Liberator
10 minutes
Creating RGB and LRGB Images in Photoshop
PART 4
Creating RGB and LRGB Images in Photoshop
20 minutes
Creating a Narrowband Image with Photoshop
PART 5
Creating a Narrowband Image with Photoshop
22 minutes
Light Pollution & Gradients Quick Fixes in Photoshop
PART 6
Light Pollution & Gradients Quick Fixes in…
11 minutes
Photoshop: Levels & Curves
PART 7
Photoshop: Levels & Curves
15 minutes
Cosmetic correction in Photoshop & PixInsight
PART 8
Cosmetic correction in Photoshop & PixInsight
13 minutes
Image Processing with Photoshop's Camera Raw Filter Menu
PART 9
Image Processing with Photoshop's Camera Raw…
18 minutes
PART 1

Data Visualization with PixInsight

Comments

Thank you for the detailed tutorial. Where can you get the red, green and blue filtered images? Pro Datasets include a variety of pictures but none is labelled as R, G or B.

Without these, I am unable to put together the RGB image in PS. Thank you.

Reply: 3

Hi Viktor. Glad to hear that you like the tutorial. The Pro Datasets should include the full set of sub-exposures for the chosen target. Some datasets will consist of narrowband sub-exposures so they won't be labelled R, G, or B but you can still produce an excellent colour image using the 'Hubble' palette. Let me know which datasets are you interested in processing and I'll check the filter data for you. Regards, Nik

Thank you for your intention to help me, Nik. I have just received my first One Click Observation. The package includes 3 files: one with SII, the other with Halpha, the third with OIII filter. They don't mean anything to me. When I generate the tiff files and want to merge channels in RGB in PS, I don't know which filter corresponds to the G, R, B filter.

I am totally new to AP, and have just little experience with PS therefore I am lost with filters and the various raw files one package may contain. Is there a tutorial which explains these filters and the way these images could be merged to a colored file?

Hi Viktor. No problem...that's what we're here for! :-)) OK, your first One Click file is a narrowband set which is slightly different to RGB sets. In principle, you can create a colour image out of the data by doing the following: Copy the SII file to the RED channel, Copy the Ha file to the GREEN channel and then the OIII file to the BLUE channel. This is the Hubble palette that I referred to earlier. When you view the combined image the stars may be out of registration but you can move the channels independently to align them. I suggest you use the Ha channel as the main channel and align the other two to that. The image will look a bit green but that's perfectly usual. Use Photoshop's Selective Colour menu to change the colours to a view that you like. I do have have Photoshop tutorials on the Telescope Live website. Search for my name on the Tutorials page and then scroll through them to the tutorial titled 'Creating a Narrowband Image with Photoshop'. Let me know how you get on. Which object did you image with your One Click observation? Cheers. Nik