PixInsight - Comet Processing

Option b) Starless Image Integration on Comets using using the Image Integration Process

updated: 2023-02-12

  

Purpose

Alignment of all frames on a comet instead of star or deep space objects (DSOs)


Image Registration is the process of matching two or more images of the same scene by superposition. This requires estimating optimal geometric transformations to align the images with respect to a common reference. Image registration is of crucial importance in all processing and analysis tasks based on the combination of data from sets of images. Some examples are image integration, multichannel image composition, shared information retrieval, change detection and image mosaicing. These tasks have applications in astronomy, medical imaging, remote sensing, cartography, real-time target recognition and computer vision, just to name a few.

Activation

Process 🡺 All Processes 🡺 Image Integration

Input

Batch of comet aligned frames

Output

Integrated Master Frame

Previous Step

Next Step

Tutorial



Step

Description

Action

1

Open the Image Integration Tool

Process 🡺 All Processes 🡺 Image Integration

2

Then do an Image Integration using the following parameters


  • Add the comet aligned frame from the previous step
  • Add drizzle data obtained in the previous steps



3

Image Integration Settings

4

Pixel Rejection 1 Settings

5

Pixel Rejection 2 Settings

Sigma parameters are quite difficult to estimate, try these settings. Especially the sigma high value 0óf 0.8 should help to cut off most of the stars.

Sigma low: 4.0

Sigma high: 0.8 

Winzoration cutoff: 5.0

Range low: 0

6

Signal and Noise Evaluation

7

Result

is an integrated image with more or less all stars erased from the background



compared to No Rejection:

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