Release Notes

Version 1.0

Date: soon :)

New Features

• Unified dark interface
• Color saturation adjustment
• Flat frame calibration
• Sigma-clipping outlier rejection when stacking in mean mode with the Photo profile
• Optional startup check for an available new ALS version

Improvements

• FITS image data stored in Image or compressed-image extensions is now supported

Bug Fixes

• Changing web folder path required a restart to take effect
• Stopping an empty session could save a timestamped final image
• Some session trasitions were inaccurately logged
• System language detection failed on macOS
• macOS folder pickers could show protected folders such as Desktop as empty
• Starting the image server could block the interface while the server was starting
• Image server did not display its waiting image when started before a session
• Progressive alignment could produce nested rectangular artifacts after large field rotations
• The Visual profile could attempt to read subs before they were completely written on storage
• Zero-sized subs could indefinitely block preprocessing
• Webview image and exposition data could display stale values because browsers cached the resources between subs.

Version 0.7.1

Date: May 31, 2026

Improvements

• Image server is now reachable when the system running ALS also acts as a hotspot or has several network connections.

Version 0.7

Date: October 27, 2025

New Features

• Linux: Utility for creating a system launcher
• Sending usage statistics with user consent
• Reading .CR3 Canon Raw files
• Introduction of profiles (default settings for assisted visual or photo)
• Addition of a QR code display leading to the integrated web server
• Addition of jpeg, png, and tiff file reading
• French and Russian translations
• Dark frame subtraction
• Hot pixel removal
• Night mode

Improvements

• Improved web server : fullscreen mode, pan & zoom, refresh without polling
• Windows : ALS is now delivered as an installer
• Improved autostretch
• Improved zoom with default settings reset and keyboard shortcuts
• Saving logs in the user’s home folder
• Option to display only issues in the session log
• Ability to manually override the Bayer pattern used for debayering
• User-defined minimum number of matches for alignment
• Writing web content to a specific folder
• Critical session information moved to the status bar for constant visibility
• Toggleable night mode

Bug Fixes

• Windows: Failed to write images to paths containing non-ASCII characters
• Support for FITS files with .fts extension
• RPI: Crash when saving black and white images

Version 0.6.1

Date: November 18, 2019

Bug Fixes

• Defective debayering of images taken with cameras having a CFA GBRG pattern

Version 0.6

Date: November 14, 2019

New Features

• User settings dialog
• Pan and zoom in the image with mouse clicks and wheel
• Two auto-brightness adjustment methods to choose from
• Histogram display
• RGB color balance

Improvements

• Image server port is configurable
• Image server page auto-refreshes with a configurable time period
• Remembering window size and position
• Configurable image file save type
• Log window, session controls, and image processing controls can be hidden
• Fullscreen mode
• Much more responsive graphical interface

Bug Fixes

• Crash if new images are written to a slow storage device
• Image served by the web server is too bright
• Crash if the new image cannot be aligned with the current stack
• Crash if a new session is started when the scan folder is missing

Version 0.5

Date: July 10, 2019

New Features

• Stacked image can be served by the new integrated web server

Version 0.4

Date: June 22, 2019

New Features

• New stacked image processor: Wavelets

Version 0.3

Date: May 23, 2019

New Features

• Support for common DSLR raw files
• Folder scanner can be paused
• Image processing controls reset button
• New stacked image processor: SCNR

Version 0.2

Date: May 21, 2019

New Features

• Contrast and brightness of stacked images can be adjusted

Version 0.1

Date: May 18, 2019

Initial Release

• Alignment and stacking of FITS files