v3.1.0

General:

• Transition from PySimpleGUI to FreeSimpleGUI
• Transition from json5 to json-five, it's 2x faster
• Support for "delta-filter", filter object generated from wavelength point

Table generator:

• Rounded squares from Pillow replaced with custom squircle implementation
• Squircle corner for bodies without albedo
• Number of objects shown

Images:

• Option to enlarge very small images
• Mean image spectrum plot in GUI

Database syntax:

• Bond albedo key to specify spherical albedo
• Standardisation of standard deviation input
• Renaming of system, calib, indices and sun database keys

Database:

• Fixed spherical albedo of Mercury
• Added another Mercury spectrum, Earth historical spectra, Caribbean Sea and Iapetus
• Venus, Jupiter, Saturn, Arrokoth and Nereid updated

v3.0.0

Core:

• image processing rewritten from scratch, now fast
• support for spectral cubes
• Akima interpolation was replaced with an own one, both for spectra and cubes
• support of SVO Filter Profile Service, where 11 thousands filters available
• revision of spectrum processing order for better quality
• calibration of filters not with zero points, but through reference spectra
• support for AB photometric calibration system
• 10° CMF replaced with 2° CMF
• initial support for uncertainty processing

Database:

• support for geometric and spherical albedo for database unit
• support for phase functions and phase integrals
• extension rules for external files to set data type
• most of the high resolution spectra were moved from json5 to external files
• several dozen new database objects
• huge database rework thanks to Chara and Pedro J.
• support for scaling spectrum by a specific filter
• slope parameter was added

GUI and other:

• logo and icon by arbodox
• support for plotting photometry data
• significantly improved color table
• the tables tab was integrated into the database viewer
• the image tab was completely redesigned
• a lot of other improvements and fixes

There is a known issue on some systems (Windows only?) where switching to the "Image processing" tab causes the TCT window to irreversibly shrink until restarted. Askaniy cannot reproduce this.

v3.0-beta

• support of SVO Filter Profile Service is complete, where 10970 filters available
• transition to more fundamental data, filter zero points are now determined along the way
• on the other side, a filter system that worked for several years was deleted
• rearranging tabs, temporary absence of image processing
• database supports scaling spectrum by a specific filter
• support of AB photometric calibration system
• the order of photometry processing is as it should be, color accuracy improved
• replacing Akima interpolation with an own one
• several dozen new database objects

v2.3.0

• Support of external files: FITS and text files can be linked
• 120 stellar spectra, including 100 from the CALSPEC database
• New blackbody exposure scale, the spectrum can be plotted
• All the calculation logic was translated into OOP
• Linear interpolation was removed, smooth Akima splines are always used
• Intuitive complex extrapolation with a Gaussian curve
• Image processing works again
• Some restructuring and many fixes

v2.2.0

• complete rewriting of the color processing code in the OOP paradigm
• sRGB mode switched to illuminant E and now gives adequate results
• early support for filter sensitivity curves in the new WIP tab
• removed "albedo 0.5" mode
• many bugfixes and improvements

v2.1.0

• Fixed crash from bad json5 syntax
• nm_range parameter and list length matching check
• Renaming scr -> src, minor fixes
• List of TCT style colors
• Replacing Plotly with Matplotlib
• Polishing new plotting, fixes

v2.0.0

Major changes from March and April added. This is now built using the latest version of Python (3.11), so Windows 7 is no longer supported and the major version number has been incremented. See the commit history for a full changelog.

• New database reference system (short names instead of numbers)
• Color table improvements: no need to render list of references, greater adaptability, cross-platform thanks to built-in NotoSans fonts
• GUI improvements: window scalability, removal of the settings column from the tabs, full localizability at runtime, clear plot button, many design and text changes
• Major code cleanup

v1.5.0

Updates from June and July added. The repository has passed 100 commits!

• More colors of irregular moons of Saturn
• Timings of image processing for debug mode
• More than x2 faster image processing
• GUI improvement, checkbox to plot image spectra
• Indexed color images support
• Image tab logic improvement
• Tiresome bug fix
• Band exposure feature
• Solar spectrum subtraction fix, added to image tab
• Transition to new versions, ReadMe rework
• Scrollable bands
• Solar spectrum subtraction fix
• Surface brightness in magnitudes per 1 nm

v1.4.0

Updates from March and April added. The previous "v1.4.0" release has been removed because of a recent commit "finishing attempts with autoalign for now"; it makes more sense to build the new release from that.

• autoexposure feature
• keep aspect ratio in preview
• bug fix when switching photometric system
• Automatic image alignment
• Recursive channel alignment algorithm
• String fixes
• Many minor improvements in the tab 2
• Error system improvement, Zelario's exoplanet data

v1.3.2

More small fixes from February.

• overlooked some strings for translation
• Akasa is "neck" of Arrokoth
• "surface_feature" tag