| Version | Change log |
| DeepSkyStacker 6.1.0 Oct 13, 2025 |
Support for writing and reading compressed FITS files. Writing of compressed files is enabled by a check box on the Intermediate Files tab of the Stacking settings dialogue. Please be aware that floating point FITS images (which have BITPIX = -32 or -64) usually contain too much “noise” in the least significant bits of the mantissa of the pixel values to be effectively compressed with any lossless algorithm. Consequently, floating point images are first quantized into scaled integer pixel values (and thus throwing away much of the noise) before being compressed with the specified algorithm (either GZIP, Rice, or HCOMPRESS). This technique produces much higher compression factors than simply using the GZIP utility to externally compress the whole FITS file, but it also means that the original floating value pixel values are not exactly preserved. FITS files will now be written with the extension .fits rather than .fit or .fts. Resolve problem of 0xC000409 abend at startup when the user's "Documents" directory path contained non-Latin1 characters. Update build to use Qt 6.10.0 Update boost to 1.88 and libtiff to 4.7.1 Bug fix: The name of the intermediate files were created incorrectly. The stem for the file name used the content of the input filename up to but not including the first '.' character. It should have used up to but not including the last '.' character. Bug fix: Incorrect master flat files were created when bias frames were being used. This bug was introduced during the development of 6.1.0. |
| DeepSkyStacker 5.1.10 Apr 15, 2025 |
Add code to FITSUtil.cpp to process FITS keywords DATAMIN and DATAMAX when reading floating point FITS files. If present use these to determine the minimum and maximum pixel values instead of scanning the image data which gave inconsistent image scaling. This should be a) much faster, and b) should result in consistent image scaling. Also write these keywords when writing floating-point FITS files. Bug fix: Fix rounding error in "stack recap" dialogue in calculation of total exposure time. Bug fix: Resolve problems with handling of saving filelist (empty extension amongst others). Bug fix: Resolve problems with the ProcessingSettings dialogue. Bug fix: Ensure that Visual C++ runtime build 34438 is installed. Remove obsolete Score metric. If a crash occurs in the Visual C++ redistributable code, then issue a message saying: DeepSkyStacker has crashed in the Visual C++ Redistributable code, probably because that is back-level. Please download the latest version of the Visual C++ Redistributable from the Microsoft website. https://aka.ms/vs/17/release/vc_redist.x64.exe and then run it, selecting the "Repair" option Make sure the installation deletes old versions of the Visual C++ Redistributable files from the installation directory. Bug fix: Open picture file should use the Linear transformation not log(Sqrt) so that the image is displayed correctly. Implement default values for FITS keywords DATAMIN and DATAMAX which can be set using FITS/DDP settings |
| DeepSkyStacker 5.1.9 Mar 31, 2025 |
Add code to FITSUtil.cpp to process FITS keywords DATAMIN and DATAMAX when reading floating point FITS files. If present use these to determine the minimum and maximum pixel values instead of scanning the image data. This should be a) much faster, and b) should result in consistent image scaling. Also write these keywords when writing FITS floating point files. Bug fix: Fix rounding error in "stack recap" dialogue in calculation of total exposure time. Bug fix: Resolve problems with handling of saving filelist (empty extension amongst others). Bug fix: Resolve problems with the ProcessingSettings dialogue. Bug fix: Ensure that Visual C++ runtime build 34438 is installed. Remove obsolete Score metric. Bug fix: Open picture file should use the Linear transformation not log(Sqrt) so that the image is displayed correctly. |
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