PixInsight Star Reduction via Midtones adjustments and Blending (by B. Blanshan)

This video explores Bill Blanshan's pixel math expressions for star reduction in PixInsight.  Bill's original introduction and explanation of his work happened as a guest on Luke Newbould's YouTube channel.  Please see all of the links below for the channels as well as a link to download Bill's process icons as shown in this video.

00:00 Introduction
01:30 Bill Blanshan (via Luke Newbould)
02:29: I got De-emphasized
05:00 The process icons to download
05:25 Dive into the technique
07:10 Mid-tones Transfer function
08:55 How it works
10:22 Starless Image
10:55 Hack the math
11:24 Deconstruct the expression
12:10 "de-brighten" the images
12:40 Invert the images
12:55 Divide the images
13:23 The reduced stars
16:10 Screen Blending mode
20:29 Apply to a color image (Demo)
22:30 Second method
23:50 Third method

#pixinsight #pixelmath #starreduction #adamblockstudios

The Process Icons do download:
https://drive.google.com/drive/folder...

Bill Blanshan's channel:
@anotherastrochannel2173

Luke Newbould's channel:
lukomatico

The original video (it is a good idea to watch this first!):
The BEST Star Reduction Tool EVER! & ...

The original version of Adam Block's star reduction technique (that is instructional for PixInsight users to learn stuff):
Star Reduction (De-Emphasis) in PixIn...
and the Script version:
Star Reduction (De-Emphasis) in PixIn...

REVIEWS!
https://www.adamblockstudios.com/cate...