M51 Hubble data

[solo05]

Hi Ivo

With the weather the way it is in the UK at the moment I thought I would have a go at another hubble data set. I chose M51 and looked for the download files which are 400mb each.
I assumed that the numbers for each were the Nm wave length and I have started with 683 as red.

I managed to get startools to load it to the red channel and immediately did a 25% bin followed by a save. See dropbox for file.

https://www.dropbox.com/s/8v683mrnue4pf6b/M51b.tiff

I then cropped, rotated, auto developed and wiped with the result below. It is made of 24 frames stitched together but I cannot get rid of the solid lines of differing levels where the frames meet. Any clue as to how I might achieve this.

Regards
Steve

M51.jpg (501.84 KiB) Viewed 8864 times

[admin]

Hi Steve,

I'm afraid there is not a whole lot we can do about the seams. If the frames would exist individually, some field flattening could be accomplished by using the Wipe or Contrast modules, after which stitching should look better...

[solo05]

Hi Ivo

All I could do was not to use auto develop but bring up develop manually until I could see the panes beginning to appear and then back off a bit.

I also kept trying to get the colour where I wanted it, using RGB, but was not liking the results. I finally just used red and blue which came out a lot better. Green just mucked the whole thing.

Quite happy with the result.

M51_b.jpg (371.17 KiB) Viewed 8843 times

[trobbet]

Very impressive!
I wouldn't mind seeing your log on this personally.

Cheers, Tom

[admin]

That's amazing. I bet that's a very unique view no one else has ever seen before. If only the 'hidden treasures' contest was still on.

[solo05]

Very impressive!
I wouldn't mind seeing your log on this personally.

Cheers, Tom

Thanks Tom.

The first thing is to load and process the individual files. R G and B. Having found green is a problem you might use it as an L channel. These files are 400mb each and the first thing I had to do was bin at 25%. This reduces the picture size to 1/4 of original. Save each one as you complete them as a tiff.

By the way Ivo this is confusing. I thought at first 71% was the way to go to reduce by 71% but it does not mean that. 71 means the picture will reduce to 71% of original size not reduce by 71% (odd figure 71 ?) When using 50% it makes no odds of course.

OK that was done on a powerful machine as it takes a long time to do each file. Some operations take 30 mins after you click on say the keep button as it is re-scaling the whole 8000 x 12000 odd pixel picture down to a quarter size. Patience is required.

I had several goes at each one but the following below may be of help.

The B and G data are quite clean but the red is very noisy. See top of this posting.
I would try using the G as L and see how that goes.

File loaded [C:\Users\tesco\Dropbox\M51\M51b.tiff].
--- LRGB
Parameter [Cap Green] set to [No]
Parameter [Channel Interpolation] set to [On]
Parameter [RGB Blur] set to [1.0 pixels]
Parameter [Blue Ratio] set to [1.00]
Parameter [Green File] set to [1.00]
Parameter [Red Ratio] set to [1.00]
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [Off]
Parameter [Outside ROI Influence] set to [15 %]
--- Rotate
Parameter [Angle] set to [90.00]
--- Crop
Parameter [X1] set to [145 pixels]
Parameter [Y1] set to [150 pixels]
Parameter [X2] set to [2950 pixels (-100)]
Parameter [Y2] set to [1990 pixels (-160)]
File saved [C:\Users\tesco\Pictures\M51_pre_wipe.tiff].
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [No]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [75 %]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [1.00]
Parameter [Skyglow] set to [0 %]
Parameter [Digital Development] set to [92.93 %]
Parameter [Blue Luminance Contrib.] set to [100 %]
Parameter [Green Luminance Contrib.] set to [100 %]
Parameter [Red Luminance Contrib.] set to [100 %]
Parameter [Dark Anomaly Headroom] set to [5 %]
Parameter [Dark Anomaly Filter] set to [Off]
--- HDR
Parameter [Small Detail Precision] set to [Max]
Parameter [Channels] set to [Brightness Only]
Parameter [Algorithm] set to [Reveal DSO Core]
Parameter [Dark/Bright Response] set to [Full]
Parameter [Detail Size Range] set to [64 pixels]
Parameter [Noise Suppression] set to [Off]
--- Wavelet Sharpen
Parameter [Intelligent Enhance] set to [Yes]
Parameter [Scale 1] set to [100 %]
Parameter [Scale 2] set to [100 %]
Parameter [Scale 3] set to [100 %]
Parameter [Scale 4] set to [100 %]
Parameter [Scale 5] set to [100 %]
Parameter [Mask Fuzz] set to [8.0 pixels]
Parameter [Amount] set to [100 %]
Parameter [Small Detail Bias] set to [75 %]
--- Wavelet De-Noise
Parameter [Scale 1] set to [90 %]
Parameter [Scale 2] set to [90 %]
Parameter [Scale 3] set to [90 %]
Parameter [Scale 4] set to [90 %]
Parameter [Scale 5] set to [0 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Scale Correlation] set to [3]
Parameter [Color Detail Loss] set to [12 %]
Parameter [Brightness Detail Loss] set to [12 %]
Parameter [Redistribution Kernel] set to [4.5 pixels]
Parameter [Read Noise Compensation] set to [0.01 %]
Parameter [Smoothness] set to [75 %]
File saved [C:\Users\tesco\Pictures\M51_red.tiff].

-----------------------------------------------------------
StarTools 1.3.5.275
-----------------------------------------------------------

-----------------------------------------------------------
StarTools 1.3.5.275
-----------------------------------------------------------
File loaded [C:\Users\tesco\Pictures\M51\M51b_blue.tiff].
---
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [Off]
Parameter [Outside ROI Influence] set to [15 %]
--- Rotate
Parameter [Angle] set to [90.00]
--- Crop
Parameter [X1] set to [145 pixels]
Parameter [Y1] set to [150 pixels]
Parameter [X2] set to [2950 pixels (-100)]
Parameter [Y2] set to [1990 pixels (-160)]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [1.00]
Parameter [Skyglow] set to [0 %]
Parameter [Digital Development] set to [93.48 %]
Parameter [Blue Luminance Contrib.] set to [100 %]
Parameter [Green Luminance Contrib.] set to [0 %]
Parameter [Red Luminance Contrib.] set to [0 %]
Parameter [Dark Anomaly Headroom] set to [5 %]
Parameter [Dark Anomaly Filter] set to [Off]
--- HDR
Parameter [Small Detail Precision] set to [Max]
Parameter [Channels] set to [Brightness Only]
Parameter [Algorithm] set to [Tame Highlights]
Parameter [Dark/Bright Response] set to [1.00]
Parameter [Detail Size Range] set to [20 pixels]
Parameter [Noise Suppression] set to [Off]
File saved [C:\Users\tesco\Pictures\M51\51blue.tiff].
File loaded [C:\Users\tesco\Pictures\M51\M51b_green.tiff].
---
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [Off]
Parameter [Outside ROI Influence] set to [15 %]
--- Rotate
Parameter [Angle] set to [90.00]
--- Crop
Parameter [X1] set to [145 pixels]
Parameter [Y1] set to [150 pixels]
Parameter [X2] set to [2950 pixels (-100)]
Parameter [Y2] set to [1990 pixels (-160)]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [1.00]
Parameter [Skyglow] set to [0 %]
Parameter [Digital Development] set to [90.22 %]
Parameter [Blue Luminance Contrib.] set to [100 %]
Parameter [Green Luminance Contrib.] set to [100 %]
Parameter [Red Luminance Contrib.] set to [100 %]
Parameter [Dark Anomaly Headroom] set to [5 %]
Parameter [Dark Anomaly Filter] set to [Off]
File saved [C:\Users\tesco\Pictures\M51\51green.tiff].

-----------------------------------------------------------
StarTools 1.3.5.275
-----------------------------------------------------------
File loaded [C:\Users\tesco\Pictures\M51\51blue.tiff].
File loaded [C:\Users\tesco\Pictures\M51\M51_red.tiff].
File loaded [C:\Users\tesco\Pictures\M51\51green.tiff].

-----------------------------------------------------------
StarTools 1.3.5.275
-----------------------------------------------------------
File loaded [C:\Users\tesco\Pictures\M51\51blue.tiff].
File loaded [C:\Users\tesco\Pictures\M51\M51_red.tiff].
File loaded [C:\Users\tesco\Pictures\M51\51green.tiff].
--- LRGB
Parameter [Cap Green] set to [No]
Parameter [Channel Interpolation] set to [On]
Parameter [RGB Blur] set to [1.0 pixels]
Parameter [Blue Ratio] set to [1.00]
Parameter [Green File] set to [1.00]
Parameter [Red Ratio] set to [1.13]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [1.00]
Parameter [Skyglow] set to [3 %]
Parameter [Digital Development] set to [6.79 %]
Parameter [Blue Luminance Contrib.] set to [100 %]
Parameter [Green Luminance Contrib.] set to [100 %]
Parameter [Red Luminance Contrib.] set to [100 %]
Parameter [Dark Anomaly Headroom] set to [5 %]
Parameter [Dark Anomaly Filter] set to [Off]
--- Color
Parameter [Cap Green] set to [No]
Parameter [Bias Slider Mode] set to [Sliders Reduce Color Bias]
Parameter [Style] set to [Scientific (Color Constancy)]
Parameter [LRGB Method Emulation] set to [50/50 Layering]
Parameter [Dark Saturation] set to [2.00]
Parameter [Bright Saturation] set to [Full]
Parameter [Saturation Amount] set to [200 %]
Parameter [Blue Bias Reduce] set to [1.00]
Parameter [Green Bias Reduce] set to [1.00]
Parameter [Red Bias Reduce] set to [1.00]
Parameter [Mask Fuzz] set to [1.0 pixels]
File saved [C:\Users\tesco\Pictures\M51\RGB_M51.tiff].
File saved [C:\Users\tesco\Pictures\M51\RGB_M51.jpg].
--- Life
Parameter [Detail Preservation] set to [Min Distance to 1/2 Unity]
Parameter [Compositing Algorithm] set to [Power of Inverse]
Parameter [Inherit Brightness, Color] set to [Off]
Parameter [Output Glow Only] set to [No]
Parameter [Airy Disk Sampling] set to [128 x 128 pixels]
Parameter [Airy Disk Radius] set to [8 pixels]
Parameter [Glow Threshold] set to [12 %]
Parameter [Detail Preservation Radius] set to [20.0 pixels]
Parameter [Saturation] set to [50 %]
Parameter [Strength] set to [100 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
File saved [\Pictures\M51\RGB_M51b.tiff].


Hope this helped a bit.

Steve

[solo05]

That's amazing. I bet that's a very unique view no one else has ever seen before. If only the 'hidden treasures' contest was still on.

Thanks Ivo, that is quite a compliment coming from you. I only did the easy bit, NASA did the hard part.

Steve

[trobbet]

Steve,

Thanks so much for detailing what you did! I'm sure I will return to this log in the future in my learning journey. I doubt my computer could handle such large files, but I really appreciate what you have done here. An image where individual stars in a far off galaxy can be resolved is also impressive, and the fact that one can access Hubble files like these is fantastic!
Hope your skies clear soon.

Tom