Imaging The Heavens - Basic Processing 3

An example of tri-band colour image processing using emission line filters (Ha, OIII and SII)

Single dark subtracted Ha filtered subframe

Single dark subtracted Ha filtered subframe

Single dark subtracted OIII filtered subframe

Single dark subtracted OIII filtered subframe

Single dark subtracted SII filtered subframe

Single dark subtracted SII filtered subframe

6 x 10 minute Ha subframes combined

6 x 10 minute Ha subframes combined

6 x 10 minute OIII subframes combined

6 x 10 minute OIII subframes combined

6 x 10 minute SII subframes combined

6 x 10 minute SII subframes combined

Colour combining the image

Colour combining the image

Aligning the colour image

Aligning the colour image

Colour weighting

Colour weighting

Stretching and saving as 16 bit TIFF file

Stretching and saving as 16 bit TIFF file

1st use of curves

1st use of curves

Cropping image

Cropping image

1st use of levels

1st use of levels

2nd use of curves

2nd use of curves

Gradient removal with

Gradient removal with

2nd use of levels

2nd use of levels

Increase contrast

Increase contrast

Local contrast enhancement in

Local contrast enhancement in

Noise reduction

Noise reduction

Colour balance and levels

Colour balance and levels

Final curves adjustment

Final curves adjustment

Cropped closeup

Cropped closeup