Split into channels. Then register the R channel with Ha so that the sizes and positions of the stars match. Next, do pixel math. Load these files and use formulas: either median Red + (Halpha - med(Halpha)) * 1.5, or continuum $T + (H_Starless - (R * 0.1)) * 2. Sometimes you can also blend it into the L channel. If using continuum, it's better to remove stars from Ha before the math. You'll figure it out.
"then register the R channel with Ha" — what does "register" mean? As I understand it, you need to align by stars, then remove stars from R and Ha, and combine them using the median with the first formula in pixel math?
7 Sep, 2026
Reply
Comments are available only to registered users. Register or log in to leave a comment.
Comments
Comments are available only to registered users. Register or log in to leave a comment.