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Nebulosity User’s Manual
Table of Contents
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2
3
4
5
6
7
Introduction............................................................................................................................. 4
Features ................................................................................................................................... 5
Main Screen ............................................................................................................................ 8
3.1
Image Window................................................................................................................ 8
3.2
Display Panel .................................................................................................................. 8
3.3
Camera Panel .................................................................................................................. 9
3.4
Exposure Panel.............................................................................................................. 10
3.5
Capture Panel ................................................................................................................ 10
3.6
Status Bar ...................................................................................................................... 11
Capturing Images .................................................................................................................. 13
4.1
Monochrome vs. Color?................................................................................................ 13
4.2
One-shot color: RAW vs. RGB?................................................................................... 14
4.3
File formats ................................................................................................................... 14
4.4
Automatic Offset........................................................................................................... 16
Image Processing .................................................................................................................. 17
5.1
Basic Pre-processing: Theory ....................................................................................... 17
5.2
Basic Pre-Processing: How-to ...................................................................................... 18
5.2.1
Automatic dark frame scaling............................................................................... 19
5.3
Bad Pixel Mapping ....................................................................................................... 20
5.4
Image Alignment and Stacking: Theory ....................................................................... 21
5.4.1
Averaging, Adding, and Adaptive Stacking ......................................................... 22
5.5
Image Alignment and Stacking: How-to (Traditional translation method) .................. 23
5.6
Colors In Motion (Simultaneous translation align + Color reconstruction) ................. 24
5.7
Drizzle alignment (Translation & Rotation + Resolution enhancement) ..................... 25
5.8
Additional Processing ................................................................................................... 27
5.8.1
Power Stretch ........................................................................................................ 27
5.8.2
Digital Development (DDP) ................................................................................. 29
5.8.3
Tighten Star Edges................................................................................................ 29
5.8.4
Scale Intensity....................................................................................................... 30
5.8.5
Zero Min ............................................................................................................... 30
5.8.6
De-Mosaic............................................................................................................. 30
5.8.7
Adjust Color Offset............................................................................................... 31
5.8.8
Adjust Color Scaling............................................................................................. 31
5.8.9
Discard Color ........................................................................................................ 31
5.8.10
Binning.................................................................................................................. 32
5.8.11
Measure Distance.................................................................................................. 32
5.8.12
Crop....................................................................................................................... 32
Camera Advanced Panel ....................................................................................................... 33
6.1
SAC7 and Long exposure webcam settings.................................................................. 33
Taking Good Images............................................................................................................. 35
7.1
Your Telescope ............................................................................................................. 35
7.2
Your Mount................................................................................................................... 36
7.2.1
Polar Alignment .................................................................................................... 36
7.2.2
Periodic Error and Guiding................................................................................... 36
7.3
Focus ............................................................................................................................. 37
Version 1.1.3 (1/31/2006)
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