# AutoIntegrate v1.84 - Calibration updates

**URL:** <https://forums.ruuth.xyz/t/autointegrate-v1-84-calibration-updates/286>\
**Category:** AutoIntegrate\
**Created:** [February 19, 2026, 5:02pm UTC](https://forums.ruuth.xyz/t/autointegrate-v1-84-calibration-updates/286 "2026-02-19T17:02:09Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jarmor](https://forums.ruuth.xyz/letter_avatar_proxy/v4/letter/j/6f9a4e/32.png) [@jarmor](https://forums.ruuth.xyz/u/jarmor)\
**Post date:** [February 19, 2026, 5:02pm UTC](https://forums.ruuth.xyz/t/autointegrate-v1-84-calibration-updates/286/1 "2026-02-19T17:02:09Z")

</div>

PixInsight: Script / AutoIntegrate  
Repository: `https://ruuth.xyz/autointegrate/`

Changes in AutoIntegrate v1.84 are listed below.

**Calibration changes**

- Masters button — New button in the Files tab to load master calibration files (bias, dark, flat, flat dark) from a directory in one step.
- Generate Masters Only mode — New option to run calibration and generate master frames without requiring light files.
- Dark frame grouping by exposure time — Dark files are now grouped by exposure time in the TreeBox allowing multiple exposure times for calibration matching. Master darks are auto-detected per exposure group.
- Master flat dark support — Master flat dark files can now be specified and are used in the calibration engine.
- Default values for calibration options have been updated to better match with modern CMOS sensors.

**Bug Fixes**

- Fixed TreeBox clearing incorrectly when adding new files.
- Preview fixes and updates.

---

<div class="post-metadata">

**Author:** ![jarmor](https://forums.ruuth.xyz/letter_avatar_proxy/v4/letter/j/6f9a4e/32.png) [@jarmor](https://forums.ruuth.xyz/u/jarmor)\
**Post date:** [February 23, 2026, 4:26pm UTC](https://forums.ruuth.xyz/t/autointegrate-v1-84-calibration-updates/286/2 "2026-02-23T16:26:47Z")

</div>

Fixes in 1.84.1

Calibration fixes

- Fixed a bug where master bias was silently disabled on light frames when Optimize darks was off (the default), even when bias frames were available
- Fixed bias handling when Pre-calibrate darks is enabled: bias is now correctly applied directly to lights instead of being lost when the dark has already had bias removed
- Master darks created with bias subtracted now write CALSTAT=B to their FITS header; AutoIntegrate reads this keyword automatically on subsequent runs, so the Pre-calibrate darks checkbox no longer needs to be set manually in those cases
- Fixed flat integration always using Average combination regardless of the user’s integration combination setting (Average is correct for flats)

Dark matching

- Light frames within the same filter are now grouped by exposure time before calibration, so each exposure time group is matched to the correct master dark
- Added a warning when a single master dark’s exposure time does not closely match the lights being calibrated (consistent with the existing warning in the multi-dark path)
- selectMasterDarkForExptime is now called unconditionally for both single and multiple master dark cases

Flowchart

- Exposure time is now shown in the flowchart for dark integration (e.g. ImageIntegration:dark (300s)) and light calibration
- Flowchart file filtering now picks one representative file per exposure time group for lights and flats, so all exposure variants are visible in the flowchart

Bug fixes

- Fixed master dark filename showing \_undefined instead of the exposure time when all darks share a single exposure time
- Fixed AutoMaster dark windows not being closed when a window prefix was in use
- Fixed stretching mode always defaulting to Auto STF when restoring settings from a JSON file
- Fixed a bad flowchart call