Pixinsight Lerar Link May 2026

Step 1: Choose Your Reference Select the best frame of your dataset. Usually, for RGB imaging, the Green channel is the brightest. For Narrowband, Ha is often the reference.

Step 2: Open LinearFit

Step 3: Set the Reference

Step 4: Apply the Link

This is the "Lerar Link" you have been seeking. It creates a mathematical bridge between the channels so they can be combined harmoniously via ChannelCombination.

If you regularly use Local Normalization, these third-party tools simplify the linking process.

You cannot use LinearFit on stretched images (images you have already processed with HistogramTransformation or Curves). LinearFit only works on linear, unstretched data.

Sometimes, the Luminance layer can overpower the colors, making the image look too monochromatic.

Before we dive into Local Normalization, you must understand basic linking. WBPP automates this, but errors happen.

The PixInsight interface might seem daunting at first glance, with numerous modules and tools. However, once you understand the layout and how different components interact, it becomes more manageable.

Let me know, and I’ll give you a precise review of the specific product you meant!

, a critical phase in astrophotography processing where data remains mathematically proportional to the light captured by the sensor. Understanding Linear vs. Non-Linear Data pixinsight lerar link

In PixInsight, your "story" or workflow typically follows two main chapters: Linear Data

: This is the raw state after stacking. The image looks almost black because the brightness values are very low, but the mathematical relationships between pixels are preserved. Non-Linear Data

: This is the state after you "stretch" the image (using tools like HistogramTransformation or Generalized Hyperbolic Stretch) to make the details visible to the human eye. Essential "Linear" Workflow Links & Resources

If you are looking for guides on how to handle data during this phase, these resources are highly regarded: Official Tutorials PixInsight Resources

page provides links to official and unofficial tutorials covering linear processes like background extraction and color calibration. Beginner's Workflow (2025 Edition) : A streamlined Easy Beginner's Workflow that walks through the interface and initial results. Linear Sharpening : For advanced detail, this Image Sharpening Tutorial

explains how to enhance crispness while the data is still in its linear state. Complete Processing Guide : A full walkthrough from raw stacked master to finished image

, detailing every decision in the linear and non-linear phases. Quick Shortcuts for Linear Processing

While working in the linear phase, use these shortcuts to see your work without permanently altering the data: Screen Transfer Function (STF)

to apply an "Auto Stretch" that lets you see the image while it remains technically linear. to navigate through your processing steps. pixinsight.com.ar specific process

(like Color Calibration or Deconvolution) to perform while your data is still linear? PixInsight - Easy Beginner's Workflow | 2025 Edition

The "linear link" in PixInsight typically refers to the Linked Channels mode within the Screen Transfer Function (STF) Step 1: Choose Your Reference Select the best

. Understanding this concept is critical for astrophotographers because it dictates how raw, linear data is visualized before it is permanently stretched into a non-linear state. The Purpose of STF and "Link" Mode

In astrophotography, raw images (linear data) are extremely dark because most of the captured signal is concentrated in the low-intensity range. The Screen Transfer Function (STF)

provides a "virtual stretch" that lets you see the hidden details of your image without actually changing the underlying data. Link Channels

icon (represented by a chain link button in the STF window) determines whether PixInsight calculates the auto-stretch for each color channel (Red, Green, and Blue) identically or independently. Linked vs. Unlinked: When to Use Which Linked Mode (The "Link" is On):

PixInsight applies the same mathematical stretch parameters to all three channels simultaneously. This is the preferred mode once your image is color calibrated (e.g., after using Spectrophotometric Color Calibration (SPCC) ). It preserves the true color balance of the data. Unlinked Mode (The "Link" is Off):

PixInsight calculates a custom stretch for each channel based on its individual histogram. This is essential for raw images that have a heavy color cast (often green from a Bayer matrix or red from light pollution). Unlinking the channels effectively "neutralizes" the background on your screen so you can actually see the nebula or galaxy hidden behind the cast. Workflow Significance Initial Inspection: For a raw RGB image, you will almost always start with

mode to remove the dominant color cast and inspect your signal. Color Calibration:

After performing background neutralization and color calibration, you should switch back to Linear Fit: A related tool, the Linear Fit

process, is used to permanently match the brightness levels of different master frames (like R, G, and B or narrowband Ha, OIII, and SII) before they are combined. This "links" their physical intensity levels to ensure a balanced starting point for processing. Key Controls in PixInsight Chain Link Icon:

Toggles between Linked and Unlinked modes in the STF process window. Radioactive (Nuke) Icon:

Applies the auto-stretch based on the current Link/Unlink setting. Ctrl + Click (Nuke): A shortcut to apply an Shift + Click (Nuke): A shortcut to apply a Histogram Transformation Step 3: Set the Reference

In PixInsight, "creating a piece" typically refers to several distinct tasks: creating a linear mask (piece of an image), generating a new image from scratch, or creating a process icon for your workflow. 1. Creating a "Piece" of an Image (Mask or Preview)

If you want to isolate a specific section of your data to process it individually:

Previews: Press Alt + N (or the 'N' key) and click-drag over your image to create a preview box. To make this its own standalone image, simply click and drag the preview’s view selector tab (on the side of the window) onto the workspace.

Masks: To create a uniform piece to use as a mask, go to File > New to open the New Image window. You can set specific dimensions or match the active image to create a blank slate for masking. 2. Creating a Process Icon To save a "piece" of your workflow for future use:

Create Icon: Drag the blue triangle (Process Drag Object) from the bottom-left of any open process window (like Curves or Histogram) onto the empty workspace.

Save/Manage: Right-click these icons to rename them or save the collection as a .xpsm file for later sessions. 3. Creating Mosaics (Combining Pieces)

If you are trying to create a larger "piece" (a mosaic) from multiple image frames:

Alignment: Use the MosaicByCoordinates script for geometrically correct large mosaics.

Merging: Use tools like GradientMergeMosaic or the PhotometricMosaic script to seamlessly blend the edges. 4. Advanced: Learning PixInsight

For those just starting, the learning curve is often managed through specific "starter" pieces of a workflow: PixInsight Processing For Beginners

I have interpreted your request as "PixInsight LRGB Combination" (using the Luminance, Red, Green, and Blue channels). "Lerar" appears to be a typo for "LRGB," which is the most common workflow topic associated with that letter sequence in astrophotography processing.

Here is a blog post draft tailored for astrophotography enthusiasts.