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Open Galileo

Open Galileo is free, open-source desktop software for focus stacking and signal integration.

Place
#10 of 24
Score
6.3
Open Galileo's website

What Open Galileo is

Open Galileo is free, open-source desktop software for focus stacking and signal integration. It is intended for scientific photography, microscopy, macro photography, astrophotography, and technical documentation, and the release offers a Windows executable. The software automatically aligns images using correlation algorithms and compensates for focus breathing and small variations between shots. Focus stacking options include PMax multiband, weighted average, and depth-map fusion. Astronomy mode supports mean, median, sum, and sigma-clipping integration. Its image processing uses focus measures based on Laplacian, Difference of Gaussians, and variance, along with multiscale fusion using Laplacian pyramids. Optional filters include contrast normalization, CLAHE, Unsharp Mask sharpening, and noise-reduction methods such as BM3D and approximate Noise2Void. It can process folders and save results automatically, with support for JPG, PNG, TIFF, and RAW images. The interface includes real-time previews, progress bars, and parameter sliders. The software is released under CC BY-NC 4.0; commercial use requires the author's prior permission.

Good

  • Free software for focus stacking and signal integration
  • Automatically aligns images and compensates for focus breathing
  • Supports RAW, JPG, PNG, and TIFF
  • Processes folders and saves results automatically
  • Provides real-time previews and parameter sliders

Watch out

  • Desktop executable is for Windows
  • Commercial use requires the author's prior permission
  • No free trial is listed

Who it suits

It suits microscopists, scientists, students, macro and nature photographers, astrophotographers, and science educators who need focus stacking or signal integration. Commercial users should note that prior permission is required.

Verdict

Open Galileo offers several stacking and signal-integration methods, plus automatic alignment and batch folder processing. Its listed release is for Windows, and commercial use requires the author's prior permission.

Plans and prices

From Open Galileo's own pricing page, checked 8 Oct 2026.

All about pricing
PlanPriceWhat it gives you
FreeFreeFree without restrictions · commercial use requires prior permission
Open GalileoFreeNo restrictions stated · Free; the maker says it will always be free. Voluntary donations are accepted.

The facts

Each one read from Open Galileo's own pages, with the date it was checked.

What it does

Alignment
It automatically aligns images using correlation algorithms (ECC) and compensates for focus breathing and small shot variations.checked 8 Oct 2026
Batch processing and formats
It can process folders automatically, save results automatically, and supports JPG, PNG, TIFF, and RAW files.checked 8 Oct 2026
Developer
The maker names Brandon Antonio Segura Torres as the developer.checked 8 Oct 2026
Filters
Optional filters include contrast normalization, CLAHE, Unsharp Mask-style sharpening, and several noise-reduction methods.checked 8 Oct 2026
Focus fusion
It offers multiband PMax, weighted average, and depth-map fusion methods.checked 8 Oct 2026
Focus stacking
It offers PMax multiband, weighted average, and depth-map fusion methods.checked 8 Oct 2026
Image alignment
It automatically aligns images using correlation algorithms (ECC) and compensates for focus breathing and small variations between shots.checked 8 Oct 2026
Image processing
It uses focus measures based on Laplacian, DoG, and variance, and multiscale fusion with Laplacian pyramids.checked 8 Oct 2026
Intended users
The maker names microscopists, laboratories, scientists, students, macro and nature photographers, astrophotographers, educators, and science communicators as intended users.checked 8 Oct 2026
Interface
The interface provides real-time previews, progress bars, slider controls, and a window optimized for large screens.checked 8 Oct 2026
License
The software is released under CC BY-NC 4.0, and commercial use requires the author's prior permission.checked 8 Oct 2026
Project model
The maker describes the project as open, educational, and collaborative, and says it is free without restrictions.checked 8 Oct 2026
Purpose
Open Galileo is free, open-source software for focus stacking and signal integration in scientific photography, microscopy, macro photography, astrophotography, and technical documentation.checked 8 Oct 2026
Signal integration
Its astronomy mode supports mean, median, sum, and sigma-clipping integration.checked 8 Oct 2026
Support
The maker invites voluntary donations to support the project's maintenance and improvement.checked 8 Oct 2026

Where it runs

Platform
The release offers a desktop executable for Windows.checked 8 Oct 2026

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