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eXcalibrator
Current Version is
1.0.3.0, Mar. 22, 2010
eXcalibrator calibrates image color by using the NOMAD1 or SDSS
database to identify stars in your image that should be white.
The program then computes the correction factors to apply to the
green and blue channels.
To
install, just download and unzip eXcalibrator.zip into your desired folder
and create a shortcut for eXcalibrator.exe.
If you have any
problems or suggestions please don't hesitate to email me. There is
an email link under the Help menu.
Download the
complete
installation. (4.67 MB)
Download only the
latest .exe file. (421 KB)
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Download only the documentation
(.pdf) file. (3.98 MB) |
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Download only the documentation
(.pdf) file. (4.19 MB) |
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View the documentation .pdf file
online. (4.60 MB)
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View the documentation .pdf
file online. (4.88 MB) |
Revision History
1.0.1.0... Aug 29, 2009
With 16-bit
images, some programs place the value, 32767,
in the FITS header for the keyword BZERO. eXcalibrator now
looks for 32767 and 32768.
1.0.2.0... Sept. 1, 2009
On startup,
eXcalibrator now informs the user if a program update is available.
After downloading, it will be necessary to exit the program to unzip
and install the new executable. It may be necessary to go to the web
page to download a new documentation (PDF) file.
Bug Fix... To avoid
divide by zero errors, a Minimum Star Value has been added. The
brightness for red, green and blue must all be above this value to
include the star in the calibration. The minimum value
is initially set to 50... anything less than 50 to 100 is probably too dim to be
useful.
1.0.2.0... Feb 10,
2010
No software
changes... just an organizational rewrite of the documentation into
clearer setup and workflow sections. An example workflow was added,
showing how to use eXcalibrator's results in an image processing
program. Thanks goes to
Neil Fleming for his work on this rewrite.
1.0.2.0... Mar 13,
2010 No software
changes... just added the French translation for the documentation.
Thanks goes to Thierry SERIEYS
for this work.
1.0.3.0... Mar 22,
2010 Bug Fix...
When using the "Use Local Background" photometry method, the program
sometimes found no useable stars, resulting in a later
floating-point error. An error message was added, suggesting input
changes to find more stars.
Improvement... Added more error messages.
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