Pixinsight Lerar Link May 2026

Manually create a reference. Stack your best 10-20 subs using the ImageIntegration process (use Average, no rejection). Save this as “reference_master.xisf.” Then, in WBPP, manually link to this file under “Local Normalization Reference.” Error 2: “LN Vectors Contain NaN Values” Cause: Your reference frame has zero-value pixels (bad columns or dead pixels) that your lights don’t have. This breaks the division.

In PixInsight, a refers to telling WBPP which calibration frames (darks, flats, dark-flats) belong to which light frames. Without correct linking, your calibrated lights will have severe dust donuts or amp glow. pixinsight lerar link

Always use the “Show Linked Files” button in WBPP. This visual diagram shows exactly which calibration frame is applied to which light frame. If you see red “X” marks, your linking is broken. Part 3: Local Normalization – The Heart of Advanced "Lerar Link" Now, let’s discuss the most likely reason you searched for “Lerar Link” – Local Normalization (LN). Manually create a reference

A: Linking = matching calibration files to data files. Registering = aligning stars across frames. Both are required. A broken “Lerar Link” will break registration. This breaks the division

A: No. Darks have no astronomical signal. The reference must be a stack of lights. Linking a dark will cause division by near-zero values.

Apply a slight Pedestal (e.g., +100 ADU) to both your reference and lights before LN. In WBPP, under the “Light” tab, set “Pedestal” to 100 for all lights. Error 3: Mosaic “Seams” After Integration Cause: Local Normalization was not linked across panels. Each panel of a mosaic needs its own LN reference because the background flux differs.

Run WBPP separately for each mosaic panel. For Panel A, use a reference stack from Panel A. For Panel B, use a reference stack from Panel B. Never link Panel B lights to Panel A’s reference. Part 5: Alternative Interpretation – The "Linear Fit Link" (Pre-1.8.8) Before Local Normalization existed, PixInsight users relied on Linear Fit clipping. Some old tutorials still refer to a “Linear Reference Link.”