West Veil + Pickering's Triangle (HOO)

[STEVE333]

Wow, that has made a huge difference, much cleaner. A most excellent image, Steve.

Thanks "G" - I'll try to remember this for future images.

You are a long ways away from Santa Cruz, CA. Hope all is well with you there.

Steve

[jthommes]

Great image Steve!
What is the pixel math expression for "de-mottling"

[STEVE333]

Great image Steve!
What is the pixel math expression for "de-mottling"

Thanks Jim. The picture below shows the PixelMath setup for removing dark mottle. In practice you drag the New Instance (triangle) icon from PixelMath onto the image to be "repaired".



Any portion of the image with a "brightness" less than Thresh will be "repaired". The Stren term controls how aggressive the repair will be.

I normally start with the Thresh value set equal to the dark background. Run the process, check the results, then adjust Thresh up or down depending on whether you want more or less "demottling". Too high a value of Thresh will start removing low-level nebulosity.

Hope this helps,

Steve

[Baskevo]

Wow Steve. These are absolutely breath taking. Thank you for sharing, truly! Great job.

[jthommes]

Great image Steve!
What is the pixel math expression for "de-mottling"

Thanks Jim. The picture below shows the PixelMath setup for removing dark mottle. In practice you drag the New Instance (triangle) icon from PixelMath onto the image to be "repaired".



Any portion of the image with a "brightness" less than Thresh will be "repaired". The Stren term controls how aggressive the repair will be.

I normally start with the Thresh value set equal to the dark background. Run the process, check the results, then adjust Thresh up or down depending on whether you want more or less "demottling". Too high a value of Thresh will start removing low-level nebulosity.

Hope this helps,

Steve

Thanks Steve. Makes sense. I thought it would be something like this.

[ic_1101]

Excellent capture Steve! I do prefer your second version, stars are less prominent.
Thx for the PixelMath equation for removing dark mottle.