Cropping the Image

PixInsight - Image Transformation

updated: 2021-05-22

Purpose	Cropping is used to reduce the the image to overlapping parts that are covered by all subs. This is especially important in case Dithering was used during the exposure session.
Activation	Process 🡺 All Processes 🡺 Dynamic Crop Alternative method: click on the Process Explorer on the left side of the window and go to Geometry 🡺 Dynamic Crop
Input	Aligned picture with file name “*_i.xisf” from sub folder "aligned"
Output	Cropped picture, file name “*_i_c.xisf” into sub folder "aligned"
Previous Step	Image Integration or Weighted Batch Preprocessing
Next Step	Background Extraction
Tutorial	https://www.youtube.com/watch?v=2vXNXiw-yKE (Part 5)

Step	Action	Description
1		Zoom out until you see the gray frame surrounding the image.
2		e.g. pick the gray frame line at one corner and move it to the desired region of the picture that is covered by all subs. To keep the aspect ration, use CTRL+Left mouse key. The click on the green tick mark under the current frame to cop the image.
3	Final Step	Save the result to “*_i_c.xisf” into the sub folder Aligned)