Category Archives: "Image Processing"

I was asked a few times to show how I process my images. So here is my (current) workflow which I use as basement. I created it over the last 2 years with many help from other people on AstroBin or tutorials in the internet. At the bottom of this page, you’ll find my real check […]

After posting my recent M57 image on Astrobin, I received a feedback regarding Drizzle (thanks Marcus!). I never drizzled before since I thought it’s very complicated… It is not! Drizzle was originally developed for the NASA’s Hubble Deep Field observations. It provides a flexible and efficient way of combining dithered data, preserves photometric and astrometric accuracy, optimal […]

To stack 41P comet I used for the first time PixInsight. Unfortunately (or fortunately?;-) DSS failed to select the comet on a single frame, so I switched to PI. Finally after several hours try & error and many tutorials I was able to manage the comet. See here the used processing steps:   Comet Processing […]

First, there are 2 possibilities for a comet animation: Static comet or static stars. I’ll show here both ways since they are very similar. Note: these are very quick processing ways. They are surely improveable 😉   Static comet Run BatchPreprocessing Open Process – CometAlignment with registered images (c_d_r files can be found in subfolder “registered” […]

Reducing star size can helping highlight the main object like a Galaxy or a Nebula. PixInsight offers herefor a process called “Morphological Transformation”. On some images, I use it twice (example: Cygnus Loop). Note: Create every time a new Star Mask! Do not use the same mask for iterative transformations!   Step-by-step M33 Triangulum Galaxy: StarMask […]

Images taken with the Astronomik CLS-CCD Filter have a very strong color tint. In my case the tint was cyan and now green with the modified EOS 70D. Anyway, PixInsight offers many ways to calibrate the stacked image. I’ll show here one possible process (wich I also use for my images). Note: Because I use a modified […]

After a nightly session the first thing to do is to analyse the lights. This can be done visually or mathematically. Or both 😉 First of all I pre-sort the lights visually. But since I use an AutoGuider I can use almost every light frame. Only if there are air planes or satellites I’ll sort […]

In PixInsight 1.8 the stacking process is really easy to handle. Very similar to DeepSkyStacker, but the result is much better. The image is overall sharper. The following settings and values I’ve collected during the last half year from various forum posts or tutorials. Currently I use only light-, dark- and bias frames. No flats… […]

With the following settings I get the best stacking results with DeepSkyStacker 3.3.2 in combination with my Astronomik CLS CCD Clip Filter. With this filter the images have a strong cyan-blue tint. I use Canon RAW files for stacking. Options – Raw/FITS DDP Settings Uncheck White Balance Select “Bilinear Interpolation” or in some cases “Adaptive Homogenety-Directed Interpolation (AHD)” See DSS […]