Metadata Lab for Mac

Bug Fixes

Signal axis calibration - Replace X by other signal's Y:

• Added new "Replace X by other signal's Y" operation in Processing > Axis transformation menu for signal calibration workflows.
• Addresses critical missing functionality reported by users who needed to apply wavelength calibration or similar transformations to spectroscopy data.
• The operation combines two signals: uses Y values from one signal as the new X coordinates for another signal's Y values.
• Unlike X-Y mode (which resamples and interpolates), this operation directly uses Y arrays without interpolation, preserving exact calibration values.
• Requires both signals to have the same number of points - raises clear error message if sizes don't match.
• Automatically transfers metadata: X axis label/unit taken from calibration signal's Y label/unit.
• Menu location: Processing > Axis transformation > "Replace X by other signal's Y".
• This closes Issue #273 - Missing signal axis calibration: no way to replace X with Y from another signal.

X-Y mode:

• The X-Y mode processing operation for signals has been moved to Processing > Axis transformation > "X-Y mode" for better discoverability
• The nuance between X-Y mode (which resamples/interpolates) and the new "Replace X by other signal's Y" operation has been clarified in documentation

Lock LUT setting persistence:

• Fixed "Lock LUT range when updating data" setting not persisting in Settings > Visualization > Images > Default Image visualization settings.
• The keep_lut_range parameter was not being saved to configuration, causing the checkbox to systematically uncheck itself after validation (added missing ima_def_keep_lut_range option in configuration).
• This closes Issue #270 - Lock LUT setting not persisting in image visualization defaults.

Custom signal creation:

• Fixed AttributeError: 'NoneType' object has no attribute 'T' error when creating a custom signal from the menu.
• This closes Issue #269 - Custom Signal Creation: AttributeError when creating signal from menu.

Macro execution:

• Fixed UnicodeEncodeError when executing macros that print Unicode characters (e.g., arrows →) on Windows systems with certain locales, e.g. cp1252 (closes Issue #263)
• The macro subprocess now automatically uses UTF-8 encoding for stdout and stderr, eliminating the need to manually add sys.stdout.reconfigure(encoding='utf-8') at the beginning of each macro.

ROI coordinate precision:

• ROI coordinates are now automatically rounded to appropriate precision when defining ROIs interactively from geometrical shapes, avoiding excessive decimal places while maintaining reasonable precision relative to data sampling (1/10th of sampling period for signals, 1/10th of pixel spacing for images).
• ROI coordinates are also rounded when displaying them in the "Edit numerically" dialog, preventing floating-point arithmetic errors from showing excessive decimal places (e.g., 172.29999999999995 is now displayed as 172.3).
• This closes Issue #266 - Excessive decimal places in ROI coordinates.

Polygonal ROI handling:

• Fixed ValueError: Buffer has wrong number of dimensions error when creating masks from polygonal ROIs in the ROI editor.
• The PolygonalTool was incorrectly initializing ROI coordinates as a nested list instead of a flat list, causing mask computation to fail.

HDF5 file opening dialog:

• Fixed bug where user's choice in the "clear workspace" confirmation dialog was ignored when opening HDF5 files.
• When the user clicked "No" in the dialog, the default configuration setting was applied instead of respecting the user's choice.
• This closes Issue #267 - HDF5 file opening dialog ignores user's choice.

Creation tab axis update:

• Fixed plot not updating when modifying only xmin/xmax parameters for distribution signals (Zero, Normal, Poisson, Uniform) in the Creation tab.
• The issue occurred because the data hash calculation only considered Y values, so changes to X axis bounds were not detected.
• Plot now properly refreshes when any axis parameter changes, even if Y values remain identical.
• This closes Issue #268 - Creation tab axis not updating for distribution signals./li>

ROI statistics with out-of-bounds ROI:

• Fixed ValueError: zero-size array to reduction operation minimum which has no identity error when computing statistics on images with ROI extending beyond canvas boundaries.
• The issue occurred when a ROI partially or completely extended outside the image bounds, resulting in empty array slices during statistics computation.
• ROI bounding boxes are now properly clipped to image boundaries, and fully out-of-bounds ROIs return NaN statistics values.
• This fix is implemented in Sigima library (see Issue #1 - ValueError when computing statistics on ROI extending beyond image boundaries).

Object property panel tab selection:

• Fixed tab selection behavior in object properties panel to be more predictable and user-friendly.
• Properties tab is now always shown by default when switching between objects, providing consistent navigation.
• Creation, Processing, and Analysis tabs now appear automatically only once after their respective triggering events (object creation, 1-to-1 processing, or analysis computation), then revert to Properties tab for subsequent selections.
• This eliminates the confusing behavior where the tab would arbitrarily persist or change based on previous selections.
• This closes Issue #271 - Improve object property panel tab selection behavior.