|
Here's my "go to" basic workflow for LRGB. It's no-frills, no sharpening or deconvolution, no noise reduction etc - just bare-bones calibrating, registering, stacking, channel combining, white balance, and stretching. Gets you an LRGB image to look at, then decide what you want to tweak or improve for round 2.
1. Load all files (bias, dark, flat, light) into the Batch Preprocessing script. I use master bias and darks, but flats and lights are per session. Typically I leave the bias/darks/flats tabs default settings. In the lights tab I don't have "calibrate only" ticked, I do use Cosmetic Correction via a process icon, I don't drizzle, and I apply Image Integration. When this completes, you will have individual master LRGB files.
2. Use LRGBCombination process to combine the RGB only, with all other settings default.
3. Use DynamicCrop to trim the perimeter of images where stacking leaves that funky border. The trick here is to draw the crop rectangle in the RGB window, but don't execute the process right away. Drag the blue triangle onto the desktop to create a process icon that remembers the crop geometry. Now you can execute the crop on the RGB image. Close the DynamicCrop process. Now drag and drop the process icon you created on to the L image. Should be identical geometry to the RGB.
4. Create a preview on a background part of the RGB image. This is for background colour balance, so pick somewhere without nebulosity. Don't think it matters if there's a few stars in there.
5. Open the BackgroundNeutralization process. Leave defaults but tick "Region of Interest" and choose the preview you created above. Run that.
6. Open the ColorCalibration process. All defaults, for background reference, choose ROI and use the same preview as 5 above. For white reference, choose structure detection typically with default values. Run it.
7. Do a MaskedStretch process with defaults on both the RGB and L.
8. Using ChannelExtraction and CIE L*a*b* extract L from the RGB image. It should create a new file called RGB_L.
9. Open LinearFit and using your original L as the reference image, drag the blue triangle onto the RGB_L image.
10. Now ChannelCombination the RGB_L back into the RGB using CIE L*a*b*.
11. Finally, LRGBCombination your original L into the RGB.
|