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Tutorial:
AstroImageJ, my own macros


AstroImageJ, astrophoto editing tool

  1. Introduction
  2. Download and Installation
  3. My own downloadable macros*
  4. How to use "Masterflats from CR2 files" macro
  5. How to use "Calibrated object files from CR2 files" macro
  6. How to align rggb files
  7. How to stack rggb object files

My own macros

Here I have my own developed macros and they can be downloaded here. You download and use them on your own risk and make sure you have a backup of your files!

The first two macros I have are:

  1. Macro to make masterflats with demosaic to rggb.
  2. Macro to calibrate subobject files and demosaic to rggb.

They save the result as TIFF 32 bit floating point files.

It's my first attempt to write macros to AIJ so expect them to have some bugs!


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It's a good idea to separate the CFA-files to it's color components. It make it easer to make good quality masterflats and also save RAM memory when processing. The technique to do dark and bias calibration is a little special. Se the link on first page about "Image Reduction".

  • Download macros: Input-Output calibration batch
  • version 20160515

    These macros only works for Canon EOS at the moment, I have tested on Canon 350D, 5D and 6D. The Nikon and Sony raw files don't look to have the blocked overscan region that's needed to do this kind of dark and flat calibrations. I will later make other macros to other cameras than Canon that can open their files without the facilities to do automatic dark/bias calibration.

    Download and unpack the files in the plugins directory of AstroImageJ, see below how it should look.

    file system plugin

    Note: Even if it's a macro it should be installed in the plugin directory.


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    When you start AstroImageJ it should come up like this:

    Plugin files

    After this it's easy to run the macro, just click on it. Read on the following pages how to used them.

    On these forums you can ask questions or give comments, it could take a while until there is an answer:

  • http://aptforum.com/phpbb/ viewtopic.php?f=19&t=774
    APT Forum
  • https://stargazerslounge.com/ topic/269777-astroimagej-tutorial-and-macros/
    Stargazers Lounge forum
  • http://www.cloudynights.com/ topic/539562-astroimagej-software- tutorial-and-macro-to-download/
    Cloudy Nights forum
  • I will later concentrate me on one of these forums where I find most users of AIJ.


    Next: How to use "Masterflats from CR2 files" macro

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