| Version | Change log |
| DeepSkyStacker 6.1.2 Dec 17, 2025 |
Improve handling of images in the processing tab where the greatest pixel value was well below the maximum. This could result in the image being displayed "whited out". Add a new background calibration method that simply offsets the pixel values so that the background level is adjusted to be the same as that of the reference frame. |
| DeepSkyStacker 6.1.1 Dec 8, 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 0xC0000409 abend at startup when the user's "Documents" directory path contained non-Latin1 characters. Update build to use Qt 6.10.0, boost 1.88 and libtiff 4.7.1 Bug fix: The names 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. Update build so that Exiv2 png file support is included (along with bmff). This fixes the problem where an assertion was thrown when opening PNG files. Bug fix: Nasty problem with save/restore of Workspace settings to and from files. Trailing end-of-line wasn't trimmed off and also datatype information was often lost. This error dates back to DeepSkyStacker 5.1.0 :( Set correct bit-depth for images in DeepSkyStackerLive - was defaulting to 16 bits for 8-bit images |
| 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. |
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