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Narrow Band Deconvolution

John Gill
in PixInsight
Hi,

I normally do a Deconvolution on the Ha image and then in LRGBcombination add the Ha, Oiii and Sii. My question is "Should Deconvolution be applied to the Oiii and Sii images and then LRGBcombination?"

Regards
John

Comments

  • BlockHeadBlockHead
    Hi John,

    You know..I really wonder how important deconvolution really is in NB imagery- 
    If you have enough signal, applying it to the Lumnance image alone is sufficient. 
    If think what you are really asking is how you can get the OIII and SII components to be sharpened...
    I think the answer is to make certain they are represented/included in the luminance. Sharpening 
    the color channels will have little effect on an LRGB type image. (In fact blurring the color components is a useful trick to minimize color noise). If you are doing just an RGB type image, you can always create a synthetic Lum to sharpen. You can also, as you suggest, sharpen each channel and just combine. BUT- it is really rare that there is enough signal to deconvolve nebular features. Normally people are concerned about stars.... but for me deconvolution is important to sharpen the object (which *might be stars* like in a cluster...but usually not). 

    From what I have seen, Some well chosen contrast enhancements go much more to the look people are trying to get. Deconvolution is really for displaying images at their full resolution..and even then it is such a incremental enhancement. 

    -the Blockhead
  • John Gill
    Thanks Blockhead....as always you explain stuff so well.
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