Simulating Halation on a digitally-sourced file

StevenBills

Active member
Hi all,

By now you've most likely seen or heard of DP Steve Yedlin's Resolution demo (if not, stop here and watch it here: http://yedlin.net/ResDemo/ResDemoPt2.html).

Great insights there. Anyway, at around the 25 minute mark in part two, he starts talking about halation, and at ~29 minutes in he shows some "post" halation added to the Alexa.

The first two images below are from the 35mm film, and the third and fourth are from the Alexa (without and with Yedlin's halation algorithm added).

35mm halation.jpg

35mm halation2.jpg

Alexa without.jpg

Alexa with.jpg

So my question here is, what is going on in Yedlin's algorithm to reproduce this? My thought about how to replicate this is to duplicate the footage layer, turn it to black and white, then use levels (or similar) to just get the highlights, and then blur the highlights. Anybody have any ideas or insights into this?

SB
 
So here's my attempt. All I did was add a 10 px blur to the highlights and then color-balanced it to a warmer tone.

Without:

Alexa without.jpg

With:

Alexa with_custom.jpg

SB
 
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