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PixInsight => General => Monthly Contest (closed) => Topic started by: Javio on 2011 December 06 03:54:35

Title: December 2011 Contest Images
Post by: Javio on 2011 December 06 03:54:35
The december 2011 PixInsight Monthly Astrophotography Contest is open. Please use this post ONLY to submit your images.

Good luck!
Title: Re: December 2011 Contest Images
Post by: wvandenberghe on 2011 December 11 09:51:53
Hello everyone

I present you with my entry for this month's contest: Galaxy NGC 891 in Andromeda.

The image was made  from  my suburban location near Bruges Belgium.
Sky quality : 20.38 mag/arcsec^2
Telescope :  14.5 inch f/9 Ritchey-Chretien
Mount : Paramount ME
CCD : Sbig STL-11000M
Filters : Baader L,R,G,B
Total Exposure time : 13 hours

Image capturing through CCDSOFT and TheSky6

Image processing entirely done in Pixinsight 1.7.

PIXINSIGHT PROCESSING

Calibration : save calibrated files in 16 bit, then for STL11000M use CCDOPS to fix vertical bars. 32 pixel for 1x1 binning
Register : save in 32 bit floating point



Step 1 Luminance processing, image integration, dynamic crop, DBE

Deconvolution:
-Luminance frame= linear , cropped edges
-DynamicPSF on 20 stars or so, extract mean PSF fits image
-Copy Luminance , HST to make a mask for protecting background during deconvolution. Make starMask.
-Deconvolution Gaussian PSF=external psf generated by DynamicPSF, Regularized richardson-Lucy, 100 iterations, Deringing support on with Global dark =0.04 and local deringing support by star_mask file and local amount = 0.7
Use copy luminance HST frame as mask to the linear image to be deconvoluted.
optional :Wavelet Regularization , 2 layers , Noise threshold =3.5 noise reduction 1 and 2 layer  Noise threshold =2 noise reduction 1

MultiscaleMedianTransform MMT noise reduction image
-Linear Lum fits image, add inverted luminance mask, mask is HST stretched by transferring auto ScreenTransferFunction.
-MMT 5 layer
layer 1 Scale 1 S(t=2,s=1,a=1.2)
layer 2 Scale 2 S(t=0.5,s=1,a=0.5)
layer 3 Scale 4 S(t=0.5,s=1,a=0)
layer 4 Scale 8 S(t=0.3,s=0.8,a=0)
layer 5 Scale 16 S(t=0.25,s=0.8,a=0)
layer R scale 32

-MMT Sharpening, luminance mask
layer 2 scale 2 Bias +0.1
layer 3 scale 4 Bias +0.1

-HST stretched by transferring auto ScreenTransferFunction and take blackpoint HST to bottom of curve , not clipping background.



-Star reduction : Morphological transformation,size 3,  iteraton 7, amount 0.15,selection 0.2, 2 ways 1 Circular 2 Diamond,  use star mask on image

-HST adjust the blackpoint

Step 2 RGB processing , Dynamic crop on each R,G,B, DBE on each R,G,B
- R, G , B combine channels, global button
- Color calibration : White reference image Lower limit = 0.027 , output white ref mask, Background reference image upper limit= 0.04, output background ref mask, no structure detection
- MMT
- HST
Histogram black point HST
-Color Boost : luminance mask +curvestransformation on saturation
-SCNR green , amount 1 with inverted luminance mask
-RGB + inverted Extracted Luminance, use AssistedColorCalibration, R=1 G=1 B=1.2
-Star align RGB to luminance as reference

Step 3 LRGB combine
-Dynamic registration of RGB to Lum
-LinearFit Lum  to RGB extracted Lum
-Lum combine to RGB , transfer function Saturation default
-HDRMultiscaleTransform
HDRMT 8 layers 3 to 5 iterations inverted Median Transform on, Lightness mask + Luminance checked , inverted starmask on luminance

-final HST

Hope you like it.

Wolfgang
www.vstobservatory.net


Title: Re: December 2011 Contest Images
Post by: Enzo De Bernardini on 2011 December 14 20:52:46
Hi,

I know it's a quite simple compared to the spectacular images presented here, but...anyway  ;)

Equipment
Image Data
Workflow

Best regards,

Enzo.
Title: Re: December 2011 Contest Images
Post by: gvanhau on 2011 December 19 16:04:43
Hello
I present NGC 1365, A beautiful Spiral galaxy
Taken on 30/10/2011 from Cajon del Maipo at 50 Km from Santiago de Chile.
3h20m  exposure (12x300 + 14x600)
Telescope: C8 @ F10
Camera:  QHY8L 
Mount: CGEM
Captures using Maxim DL
Guiding PHD + lodestar + OAG
All processing using PixInsigth:

Calibration
Batch Debayer
Star Align
Integration
Dynamic crop
DBE
Color Calibration
Deconvolution with star mask
Morphological transform (Selection on stars)
Histogram stretch
Color Saturation
AtrousWavelet (Noise reduction on first layers)
HDRMultiscaleTransform layer 6
SNR on green


Larger Image on this link:
http://www.flickr.com/photos/astro_gvanhau/6320382771/sizes/l/in/photostream/

I hope you like it.
Regards
Geert

Title: Re: December 2011 Contest Images
Post by: Giorgio on 2011 December 20 00:29:32
Ciao,
NGC 281 Pacman nebula
2011.11.18
comb.
SII+Ha*0.80
OIII+Ha*15
OIII
Ha 9 hours, SII 6 hours, OIII 5 hours
FS128 ruducer f/6
Mount: 10Micron GM2000
CCD: ApogeeU8300
Filter: Optec 8nm
Captures: MaximDL
All processing using PixInsigth:
I wish you a Merry Christmas.
Giorgio.
http://www.flickr.com/photos/53758843@N03/6515868867/

Title: Re: December 2011 Contest Images
Post by: Cyclop_si on 2011 December 20 13:45:19
Hi,

NGC1499 California Nebula

Ha 36x12min taken by QHY9 and Borg FL71.
RGB 48x8min taken by QHY8 and Leica APO-Telyt-R 180.

With exception of just some final tweaking all processing has been done in PixInsight.
Title: Re: December 2011 Contest Images
Post by: jeffweiss9 on 2011 December 20 16:22:22
Here's an M33 HaLRGB taken at CalStar 2011 in September (Lake San Antonio, CA):

http://www.astrophotogallery.org/november-2011-hardgalaxy/p8426-m33-triangulum-galaxy.html

Object: M33 Triangulum Galaxy
Scope used: APM 130/780 f/6 LW CNC II
Field Flattener used: Williams Optics 110/132
Mount Used: Takahashi EM-200 Temma2
Camera Used: SBIG ST-2000XM Astrodon Gen2
Exposure: L;1.2hr (8m), Ha:.7hr (8m), RGB: 1hr (4m 2x2); 3hr total
Location: Lake San Antonio, CA
Seeing 1-10:  9

Processing in PI:  Calibration, Registration and Stacking, LRGB Comb (Vicent's tutorial methodology), HDRWT, ACDNR, CT and a bit of sharpening with AWT. Extract L, RGB.   Separate Ha processing was similar.
HaLRGB Combination was done in PS CS2 using Tony Hallas technique.

Thanks.
-Jeff