Ellis_JayCalibration and Pre-processing, by Jay Ellis



So we have stayed up all night (or maybe two or three) to collect image data (light frames) on an astronomical target and now want to transform these “raw” images into a final pretty picture.


Where do we start? Generally the first step in this transformation process is the calibration, registration, and integration of the raw images into master frames that are then post processed to produce the final image. These first steps often have a profound impact on the quality of the final image and have often caused both beginning and seasoned imagers many, many headaches.


In this class we will discuss image calibration, followed by image registration, and ending with the integration of the calibrated and registered image data into the final master frames to be used for post-processing.

  • We start with a discussion of the various noise sources that we want to minimize in the raw images, how to collect calibration data and generate calibration masters, and finally how to apply these calibration masters to the raw image data.
  • Then we will cover image registration in preparation for image integration, and
  • Lastly we will discuss the image integration process that results in maximizing the quality of the master lights that used for post processing into to the final image.



None.  However if you have taken some astro images, you may find that techniques discussed here may lead to improvements in your images!


Daytime session (1 hour 15 minutes)

Monday, May 18, 2020, (10:30 – 11:45 AM)