Image-Processing with IRIS

7. Saving and Exporting the Stacked Image

To save the stacked images, select FILE > SAVE. You may choose among the following file format: PIC, FIT, BMP, TIF, JPG, and PNG. In this example, I am saving the file in BMP format in the Desktop and naming it M27.

You may then import the stacked image to other applications to perform post-processing adjustments.

M27 Dumbbell Nebula, Single vs Stacked

The steps outlined here also work with large targets such as the moon. In the example below, I selected the part of the moon I wish to align using a selection rectangle, and then run the command pregister i i_pregistered 512 500. I then stacked the 500 registered images using the command add_norm i_pregistered 500.

Here’s the comparison between a single photo and a stack of 500 frames, processed in IRIS.

Moon, Single vs Stacked (500 frames)

The next part of this article will explain how to process image data in video format, as in the case of planets Saturn, Jupiter, Mars, and Venus.

Night Sky in Focus | Astronomy and Amateur Radio
© Anthony Urbano | Manila, Philippines

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