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Thread: AP Challenge # 20

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    Default AP Challenge # 20



    ************************************************** ***********************************
    Announcing the AstronomyForum.net
    Astrophotography Processing Challenge number 20!


    About once a month a new 'Challenge' photo will be made available. These will be announced in a new thread 'stickied at the top of the Astrophotography Processing Forum. Members may click on the link and download the calibrated 16 bit .tif file (Keep in mind these will be very large files so give them some time to download to your computer) These images will be 'pre-processed' images (darks, flats, bias removed and stacked). Due to the limits of the forum, the images have been resized and converted to 16 bit format to allow posting.

    This Challenge thread will close at the end of February, and a new Challenge will be posted. You can still download and play with the image however you will not be able to enter the Challenge after the thread is closed.

    ____________________________________________

    We ask that the members use any software they want, GIMP, Photo Shop (or PS Elements), Pixinsite, Images Plus, StarTools, AstroArt, IRIS or whatever your little heart desires to post process the image. Attach the completed image (please post as a .jpg max 1000 x 1000 pixel size) on the same tread and include the methods you used to get to the end result. Please submit your methods with as complete of detail as you can so others will have some idea how you got to the final result.


    ___________________________________________
    Example:


    Post processed using Photoshop CS2 with Noel Carboni's actions

    1. levels and curves to bring out
    DSO
    2. Noel Carboni's plug in "Soft Color Gradient removal"
    3 Set black and white points using levels
    4 Noel Carboni's plug in "Local contract enhancement"
    5 Did some minor cosmetic fixes using
    PS clone stamp.
    6 Increased saturation using Adam Blocks method. (can give details if you like.
    7 Noel Carboni's plug in "Increase star color"
    8 A final pass of levels and curves, used curves to help pull out the contrast.
    9 Noel Carboni's plug in "Deep Space noise reduction" and a couple of passes with the "Denoise" PS plugin.
    10 PS "Smart Sharpen" tool (Shadow, fade 80%
    Highlight, 20%
    Power, 65%)
    11 Resized to 1000 px max and converted to .jpg.


    _________________________________________________

    Please export your full history from Photoshop, GIMP or similar programs - See here: How To Document & Post Your Processing Steps from History Photoshop CS, Gimp Software LINK

    The concept is to allow members to share processing techniques and ideas so everyone can learn and improve. The Challenge is open to all so don't feel intimidated as we are all learning. If you see a post and don't understand how a particular process is being done please ask as I'm sure there will be many new methods.


    The plan is only one Challenge image will be used for each thread so it will be easy to see the different results and methods for a particular image. I may be asking some of our accomplished AP er's to contribute a pre-processed image from time to time so we can get some variety.


    Keep in mind we now have a sponsor for the Challenge!

    Ivo from StarTools will be donating a free license for his StarTools software (here's a link to his website Welcome | StarTools) for the best completed Challenge image, one license will be awarded for the best post processed Challenge image every 3rd Challenge. (ie this one will be for Challenge 20, 21 and 22).

    ******************************

    Since so many folks liked Richards (frant) data so much here's another! (thanks for contributing Richard!!!!)

    Challenge 20 information:

    Member: frant (Richard)
    Target: M33 Galaxy
    Frames: 23 x 600sec, calibrated with darks, flats and bias.
    Total Exposure: 3 hours 50 mins.
    ISO: 800
    Location: Cambridge, UK.
    Date: Imaged 25th September 2014.
    Stacking software: PixInsight, Winsorized sigma clip rejection.
    Equipment: 8" Ritchey Chretien, HEQ5, Full Spectrum Modded Canon 1000D, CLS-CCD LP filter.


    ****************************

    And as always!
    Have Fun!!!!
    Attached Images Attached Images
    Last edited by ghswen; 02-01-2015 at 06:06 PM.
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    Gordon
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    Default Re: AP Challenge # 20

    More very nice data from Richard. Processed in Photoshop CS2. I found the color balancing a little tricky on this one (makes me appreciate Richard's beautiful finished images even more).

    Curves and Levels
    GradientXTerminator
    Crop to eliminate nonuniform regions around border
    Color Balance
    Light noise reduction with Filter/Blur/Surface Blur
    Add Luminance layer
    Light noise reduction with Filter/Blur/Surface Blur
    Brightness/Contrast
    Sharpen with Filters/Sharpen/Smart Sharpen
    Brightness/Contrast
    Selective saturation boost with Sponge Tool
    Enhanced star colors by making a new layer with selected stars and then boosting the Saturation.

    Hope you like it.
    Challenge 20 PS2.jpg

    Steve
    Last edited by STEVE333; 02-02-2015 at 10:39 PM. Reason: Finish thought.
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    Default Re: AP Challenge # 20

    I haven't done one of these before since I am still a rank amateur at processing, but I am getting better, so I took a shot at this one. The processing is very basic - an initial stretch with curves, RGB channel alignment with levels (that was challenging with the overwhelming red channel), further stretching iterations with curves, a light stretching of the saturation, a light noise reduction with the central part of the galaxy masked, a very light sharpen with smart sharpen and a final high-pass filter overlaid with about 60% opacity. Once I got the colors aligned properly, I did most of the curves stretching in LAB mode and stretched the luminance layer only with the exception of the one saturation stretch on the a and b channels.

    Very nice, deep data that was a pleasure to process in comparison to the DSLR stuff I am used to processing.

    Tim
    Attached Images Attached Images
    Celestron 1400HD on a CGE Pro mount. QHY 10 OSC. Modded Canon T2i. Celestron OAG,
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    Default Re: AP Challenge # 20

    Here is my version, done in PixInsight.

    - ATrous noise reduction
    - Dynamic Crop (remove stacking edges)
    - create a Star Mask
    - Morphological Transformation (reduce star sizes, using mask)
    - Masked Stretch
    - Histogram Transformation (adjust stretch and balance colours)
    - Curves (contrast)
    - create a new Star Mask
    - Curves (star saturation, using mask)
    - SCNR (remove green)
    - Curves (remove haze)
    - ACD Noise Reduction
    - ATrous Wavelets (masked, on non-stars only)
    - Resample to 1000 pixels
    - Save As JPG

    Challenge_20-p1-1000px.jpg
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    Default Re: AP Challenge # 20

    Here is mine, done with Star Tools and Noiseware for resizing.

    challenge-20 ST_filtered.jpg
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    Default Re: AP Challenge # 20

    Whoa, on my other monitor, the saturation on mine is a bit garish. Here is a toned-down version.

    - ATrous noise reduction
    - Dynamic Crop (remove stacking edges)
    - create a Star Mask
    - Morphological Transformation (reduce star sizes, using mask)
    - Masked Stretch
    - Histogram Transformation (adjust stretch and balance colours)
    - Curves (contrast)
    - create a new Star Mask
    - Curves (star saturation, using mask)
    - SCNR (remove green)
    - Curves (remove haze)
    - ACD Noise Reduction
    - ATrous Wavelets (masked, on non-stars only)
    - Curves (reduce saturation, masked to non-stars only)
    - Resample to 1000 pixels
    - Save As JPG

    Challenge_20-p2-1000px.jpg
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    Default Re: AP Challenge # 20

    Here's my version processed with PixInsight.

    Dynamic crop
    Dynamic background extraction
    Background neutralization
    Color Calibration
    ATrous wavelet transform
    Histogram Transformation
    ACDNR
    Make Range selection mask
    Curves transformation
    Extract luminance
    Apply luminance with LRGB Combination
    SCNR to reduce green
    Reapply Range selection mask
    Curves (adjust saturation and background)
    Star mask
    Morphological Transformation (Reduce star size)
    Curves to adjust star color
    Local Histogram Eq With range mask applied
    Resampled to 1000Pix

    Challenge 20b.jpg

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    Default Re: AP Challenge # 20

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    Default Re: AP Challenge # 20

    Quote Originally Posted by K6EGF View Post

    Hi, can you please post the steps and software you used?
    Gordon
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    Scopes:
    Explore Scientific ED80CF, Skywatcher 254N, Orion ST80, Orion Atlas EQ-g mount, Orion SSAG guider. Baader MPCC MkIII coma corrector, Vixen 70mm refractor. Lunt LS35THa solar scope. Skywatcher EQ5pro mount. Imagers: ZWO ASI1600 MM Cool, ZWO ASI174mm-C (for use with my Quark chromosphere), ZWO ASI120MC Filters: LRGB, Ha 7nm, O-III 7nm, S-II 7nm Eyepieces: a few, Primary software: Cartes du Ciel, EQMOD, SGP, Nebulosity, Photoshop, StarTools V1.4
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    Default Re: AP Challenge # 20

    Sorry, I forgot to do that. I used Startools. Here it is:

    Mon Feb 02 17:03:54 2015
    -----------------------------------------------------------
    File loaded [C:\Users\Eduardo\Desktop\LIGHT_TvBulbs_LO-03iso_22_20150201-13h47m24s391ms.tiff].
    ---
    File loaded [C:\Users\Eduardo\Desktop\Challenge 20.tif].
    ---
    --- Auto Develop
    Parameter [Ignore Fine Detail <] set to [Off]
    Parameter [Outside ROI Influence] set to [15 %]
    --- Crop
    Parameter [X1] set to [8 pixels]
    Parameter [Y1] set to [6 pixels]
    Parameter [X2] set to [1188 pixels (-12)]
    Parameter [Y2] set to [781 pixels (-18)]
    --- Auto Develop
    Parameter [Ignore Fine Detail <] set to [Off]
    Parameter [Outside ROI Influence] set to [15 %]
    --- Wipe
    Parameter [Mode] set to [Correct Color & Brightness]
    Parameter [UNKNOWN] set to [Yes]
    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 [93.59 %]
    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]
    --- Deconvolution
    Parameter [Image Type] set to [Deep Space]
    Parameter [Mask Behavior] set to [De-ring Mask Gaps, Hide Result]
    Parameter [Radius] set to [1.5 pixels]
    Parameter [Iterations] set to [6]
    Parameter [Regularization] set to [1.00 (optimal noise and detail)]
    Parameter [Mask Fuzz] set to [8.0 pixels]
    --- Wavelet Sharpen
    Parameter [Intelligent Enhance] set to [Yes]
    Parameter [Scale 1] set to [1 %]
    Parameter [Scale 2] set to [25 %]
    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 %]
    --- Contrast
    Parameter [Expose Dark Areas] set to [No]
    Parameter [Compensate Gamma] set to [No]
    Parameter [Precision] set to [256 x 256 pixels]
    Parameter [Dark Anomaly Filter] set to [2 pixels]
    Parameter [Aggressiveness] set to [75 %]
    Parameter [Dark Anomaly Headroom] set to [15 %]
    --- 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 [1.00]
    Parameter [Detail Size Range] set to [20 pixels]
    Parameter [Noise Suppression] set to [Off]
    --- Life
    Parameter [Detail Preservation] set to [Linear Brightness Mask]
    Parameter [Compositing Algorithm] set to [Multiply, Gamma Correct]
    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 [4 %]
    Parameter [Detail Preservation Radius] set to [20.0 pixels]
    Parameter [Saturation] set to [50 %]
    Parameter [Strength] set to [50 %]
    Parameter [Mask Fuzz] set to [1.0 pixels]
    --- Color
    Parameter [Cap Green] set to [To Brown]
    Parameter [Bias Slider Mode] set to [Sliders Increase Color Bias]
    Parameter [Style] set to [Scientific (Color Constancy)]
    Parameter [LRGB Method Emulation] set to [Straight CIELab Luminance Retention]
    Parameter [Dark Saturation] set to [2.00]
    Parameter [Bright Saturation] set to [Full]
    Parameter [Saturation Amount] set to [200 %]
    Parameter [Blue Bias Increase] set to [6.31]
    Parameter [Green Bias Increase] set to [3.24]
    Parameter [Red Bias Increase] set to [1.00]
    Parameter [Mask Fuzz] set to [1.0 pixels]
    --- Wavelet De-Noise
    Parameter [Scale 1] set to [79 %]
    Parameter [Scale 2] set to [90 %]
    Parameter [Scale 3] set to [90 %]
    Parameter [Scale 4] set to [80 %]
    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 [6 %]
    Parameter [Grain Size] set to [2.2 pixels]
    Parameter [Read Noise Compensation] set to [2.59 %]
    Parameter [Smoothness] set to [66 %]
    File saved [C:\Users\Eduardo\Desktop\Challenge 20ST.tiff].
    --- 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 [Straight CIELab Luminance Retention]
    Parameter [Dark Saturation] set to [Full]
    Parameter [Bright Saturation] set to [Full]
    Parameter [Saturation Amount] set to [251 %]
    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\Eduardo\Desktop\Challenge 20ST2.tiff].

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