Sadr Region 9 panel mosaic

[jmtanous]

Hi,

I started this project a mouth ago or so, and yesterday I finally manage to process the last panels. I used the new GradientMergeMosaic to stitch the panels. It worked great.

This is  a 9 panel mosaic. The lights were captured with a mini borg 60mm @ 3.8 with a Baader Ha filter and a QHY9M.

The total number of frames is 64 x 20min or 21h20m.

This is what I did:

-- Calibrate each panel
-- DBE each panel
-- Create 3 super panels using GradientMergeMosaic
-- Crop each super panel (DynamicCrop)
-- Stitch the 3 super panels using GradientMergeMosaic
-- Crop the final panel (DynamicCrop)
-- Histogram adjustment (HistogramTool)
-- HDRWaveletTransform layer 7, 3 iterations
-- Histogram adjustment (HistogramTool)
-- Soft Star reduction using a starmask an morphological transform
-- Noise reduction using ATrousWaveletTransform on 1st layer 1 iteration

Link to high res image:

http://tinyurl.com/663enjw

Cheers,

Jose

[Lex]

Hi,

really nice detail, it's kindely crowded in that region :-)
Great shot!
What mount are you using?

Best

Lex

[jmtanous]

Hi Lex,

Thanks for your comments.

I use a Vixen SXD mount.

Cheers,

Jose

[Lex]

Thanks and again; really nice Shot!!!

Best

Lex

[Jules]

Jose

A super image.

Regards

Julian

[pfile]

this is wonderful. i've been dreaming of doing something like this for a long time but i'm not sure i'll ever accomplish it

[jmtanous]

Jose

A super image.

Regards

Julian

Thanks Julian!

Cheers,

Jose

[jmtanous]

this is wonderful. i've been dreaming of doing something like this for a long time but i'm not sure i'll ever accomplish it

Thanks pfile!

Is not hard to do it. Why you don't give it a try? A 1x2 panels mosaic or 2x2 is easy to achieve and the processing is very forgiving (ones you properly flatten the panels)

Cheers,

Jose

[pfile]

being crazy, i wanted to do this with a 200mm lens == hella frames...

[jmtanous]

The focal length of my miniborg is 230mm.

The main problems with wide fields mosaics are:

-- Gradients
-- Panel rotations. The closer to the celestial poles the worst it gets.

Cheers,

Jose

[roberto_volpi]

Wow, 9 panel
Congratulations, great image
Roberto

[georg.viehoever]

... I used the new GradientMergeMosaic to stitch the panels. It worked great....

I love to hear that 

[jmtanous]

Wow, 9 panel
Congratulations, great image
Roberto

Thanks Roberto!

Jose

[jmtanous]

I love to hear that 

Georg,

Thanks for the tool. It worked great.

One issue that I found (and you are already aware of it) it that the tool creates some artifacts when stitching linear data. To workaround this I had to stretch a little bit the panels before feeding them to your tool.

Cheers,

Jose