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Craig Stark, Stark LabsThursday, June 2, 2011
http://www.stark-labs.com
Overview
What can and can’t you do with Nebulosity?Who is it meant for and not meant for?
Capture demo
Scripting demo
New multi-set pre-process tool demo
Stacking demo
Stretching demo
Noise reduction demo
Thursday, June 2, 2011
http://www.stark-labs.com
What can you do with Nebulosity?
Control your camera and filter wheel
Focus
Capture (on the fly or via scripts)
Pre-process
Align and stack
Color balance and stretch
Reduce noise and sharpen
Go easily in and out of other software as you see fit
Thursday, June 2, 2011
http://www.stark-labs.com
Who is Nebulosity for?
Anyone not running a fully automated observatory
Anyone with supported hardware and $60 to spare
(or today, with $50)
Thursday, June 2, 2011
http://www.stark-labs.com
Cameras on the Mac and WindowsStarlightExpress USB2
& Filterwheel
QSI (filter wheel)
Fishcamp
SBIG (filter wheel)
Canon DSLRDIGIC II, III, 4Meade DSIs
QHY8
Thursday, June 2, 2011
http://www.stark-labs.com
Cameras on the Mac and WindowsStarlightExpress USB2
& Filterwheel
QSI (filter wheel)
Fishcamp
SBIG (filter wheel)
Canon DSLRDIGIC II, III, 4Meade DSIs
QHY8
ASCOM-5 compliant cameras Apogee cameras Atik 314, 4000, 16, 16IC, and 16HR / Artemis cameras (all 16-series and “Generation 3” series) CCD Labs Q8-HR / Q453, Q285M / QHY2 Pro FLI cameras Moravian G2/G3 Orion StarShoot Deep-Space Color Imager OpticStar DS-335 series, DS-142, DS-145, and PL-130 QHY8, QHY8Pro, QHY9 QSI 500 series SAC10 SAC7 / SC1 long-exposure modified webcams / Atik 1 and Atik 2 cameras.
Thursday, June 2, 2011
http://www.stark-labs.com
Collecting data (images) as simply as possible: Capture Demo
Simple user interface
Remove need to think too much
Reduce errors
Reduce time with gloves off
Frame/Focus
Fine Focus
Set options
Go!
Thursday, June 2, 2011
http://www.stark-labs.com
Automating data collection: Scripting Demo
What if you want to sleep?
What if you want to automatically do things on startup?
Scripting provides a simple solution to automate and:
Change exposure durations
Change filters
Change binning
...
Thursday, June 2, 2011
http://www.stark-labs.com
# Simple test script# This will take 3 shots at 1s each called "Demo1"# and then take 2 shots at 2s each, binned called# "Demo1b"
# Connect to an Starlight Xpress cameraConnectName Starlight Xpress USB
SetName Demo1SetDuration 1000Capture 3SetDuration 2000SetBinning 2SetName Demo1bCapture 2
Thursday, June 2, 2011
http://www.stark-labs.com
# Simple test script# This will take 3 shots at 1s each called "Demo1"# and then take 2 shots at 2s each, binned called# "Demo1b"
# Connect to an Starlight Xpress cameraConnectName Starlight Xpress USB
SetName Demo1SetDuration 1000Capture 3SetDuration 2000SetBinning 2SetName Demo1bCapture 2
# Assumes you’re connected already
# Setup for Lum filter shotSetExtFilter 1SetName Demo2_LSetDuration 1000Capture 2
# Setup for color filter shot# Note that the duration will still be 1sSetExtFilter 2SetName Demo2_RSetBinning 2Capture 2
Thursday, June 2, 2011
http://www.stark-labs.com
Bias, Darks, Flats, oh my!New multi-set pre-processing tool
You may have several sets of lights, each with different exposure durations, filters, and binning.
You’ll likely have some mix of flats, darks, and biases (control frames).
Control frames need to be stacked and then applied appropriately.
New multi-set tool drastically simplifies the process
Thursday, June 2, 2011
http://www.stark-labs.comThursday, June 2, 2011
http://www.stark-labs.com
Aligning and StackingAlignment modes:
Translation
Translation + Rotation (+ Scale)
Drizzle
Colors in Motion
Non-stellar automatic
Stacking
Average (mean)
Standard-deviation (sigma-clip)
Thursday, June 2, 2011
http://www.stark-labs.com
StretchingAlmost all of our interesting data in our image is packed into the left edge of our histogram.
Stretching pulls this out
Levels
DDP
Curves
Levels Transformation
Thursday, June 2, 2011
http://www.stark-labs.com
Color Balance and Adjustment
Adjust Color Offset
Adjust Color Scale
Auto-color balance
Hue/Saturation
Thursday, June 2, 2011
http://www.stark-labs.com
Noise Reduction
Adaptive Median
GREYCStoration (see Help!, Tutorials)
Thursday, June 2, 2011
http://www.stark-labs.com
Here, default over-smooths it
Thursday, June 2, 2011
http://www.stark-labs.com
Here, default over-smooths it
Thursday, June 2, 2011
http://www.stark-labs.com
Decrease overall smoothness (regularization strength)
dt = 20
(from 60)
Thursday, June 2, 2011
http://www.stark-labs.com
Decrease overall smoothness (regularization strength)
dt = 20
(from 60)
Thursday, June 2, 2011
http://www.stark-labs.com
Allow more irregular contours (contour regularity)
p = 1.2
(from 0.7)
Thursday, June 2, 2011
http://www.stark-labs.com
Allow more irregular contours (contour regularity)
p = 1.2
(from 0.7)
Thursday, June 2, 2011
http://www.stark-labs.com
Original shows fine-grain noise
Thursday, June 2, 2011
http://www.stark-labs.com
Original shows fine-grain noise
Thursday, June 2, 2011
http://www.stark-labs.com
Decrease noise scale too far
alpha = 0.1
(from 0.6)
Thursday, June 2, 2011
http://www.stark-labs.com
Decrease noise scale too far
alpha = 0.1
(from 0.6)
Thursday, June 2, 2011
http://www.stark-labs.com
Bump up noise scale a touch...
alpha = 0.2
(from 0.6)
Thursday, June 2, 2011
http://www.stark-labs.com
Bump up noise scale a touch...
alpha = 0.2
(from 0.6)
Thursday, June 2, 2011
http://www.stark-labs.com
Final tweak: Better precision
Precision 3
Runge-Kutta
Thursday, June 2, 2011
http://www.stark-labs.com
Final tweak: Better precision
Precision 3
Runge-Kutta
Thursday, June 2, 2011
http://www.stark-labs.com
GREYC helped save this shot
3 nm H-α filter (Custom Scientific)4” Refractor (Borg 101 ED F/4)
Interline CCD (QSI 540, QE = 30%)
Each of the 3 panels is ~45 min of data
Thursday, June 2, 2011
http://www.stark-labs.com
What can you do with Nebulosity?
Control your camera and filter wheel
Focus
Capture (on the fly or via scripts)
Pre-process
Align and stack
Color balance and stretch
Reduce noise and sharpen
Go easily in and out of other software as you see fit
Thursday, June 2, 2011
Questions?
Thursday, June 2, 2011
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