dugnsuz
25-04-2010, 10:10 PM
Hello all...
A wee while back I asked how others how they processed their Ha images taken on DSLRs. Some said they converted the combined image to greyscale, others said they split the combined RGB into its component channels, kept the Red one and discarded the others.
I wanted to see which method provided the best result.
Data was 9x15min subs, 300mm lens, f4 @ iso1600, Astronomik EOS clip-in Ha 12nm filter
Left hand image: RGB image stretched in Levels then converted to Greyscale.
Middle image: RGB image split into component channels, Red channel kept and stretched in Levels.
Last image: a layered blend of the 2 (75/25)
Obviously the Channel split image on the right is brighter, but it looks like a fair bit of subtle detail is blasted out - seems a layered blend of the 2 images might yield the best result (or a more aggresive stretch of the Greyscale converted image!?).
It looks to me like there should be a sweet spot between the 2 images.
All comments appreciated
A wee while back I asked how others how they processed their Ha images taken on DSLRs. Some said they converted the combined image to greyscale, others said they split the combined RGB into its component channels, kept the Red one and discarded the others.
I wanted to see which method provided the best result.
Data was 9x15min subs, 300mm lens, f4 @ iso1600, Astronomik EOS clip-in Ha 12nm filter
Left hand image: RGB image stretched in Levels then converted to Greyscale.
Middle image: RGB image split into component channels, Red channel kept and stretched in Levels.
Last image: a layered blend of the 2 (75/25)
Obviously the Channel split image on the right is brighter, but it looks like a fair bit of subtle detail is blasted out - seems a layered blend of the 2 images might yield the best result (or a more aggresive stretch of the Greyscale converted image!?).
It looks to me like there should be a sweet spot between the 2 images.
All comments appreciated