You enabled Local Normalization but WBPP found no reference frame. This happens if you used “Automatic” but all your subs are poor quality.
⭐⭐⭐⭐⭐ (5/5 for advanced users) ⭐⭐⭐ (3/5 for beginners) If you’re serious about astrophotography, it’s worth the investment. For casual editing, use (free) or AstroPixelProcessor . pixinsight lerar link
: It offers maximum control over astronomical image processing, though it has a steeper learning curve compared to alternatives like Astro Pixel Processor. You enabled Local Normalization but WBPP found no
It ensures that your Red, Green, and Blue images have the same average brightness and contrast before you combine them into an RGB image. For casual editing, use (free) or AstroPixelProcessor
Perform processes like SpectrophotometricColorCalibration (SPCC) or BackgroundNeutralization .
For Narrowband users who want a synthetic "Lerar Link" to RGB stars, this script (by J. Conejero) is the gold standard. It preserves star color while mapping Ha to Red.
