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Activity Forums Adobe After Effects Hue and saturation based desaturation

  • Hue and saturation based desaturation

    Posted by Ryan Hill on June 18, 2006 at 11:52 pm

    I want to do a selective desaturation.

    I know about Leave Colour, but it isn’t complex enough to do what I want to do. (At least not on its own)

    I want to desaturate slightly, except for colour of a certain range of hue, and only for mid to low range of saturation. (IE: very bright colours will remain very bright, but sort-of bright colours will be dimmer, and dim colours will be grey)

    What should I use to do this?

    Ryan Hill replied 20 years, 2 months ago 3 Members · 5 Replies
  • 5 Replies
  • Justin Productions

    June 19, 2006 at 1:03 am

    I fairly think that Adjust > Curves would be the perfect effect for this.

    Maybe I’m wrong, but it’s my opinion.

    Hope that helped.

    Justin Productions
    Tangerin01@hotmail.com
    Adobe After Effects 6.5 Professional

  • Andrew Kramer

    June 19, 2006 at 1:23 am

    can’t you just use the “hue and saturation” effect, just change the chanel and change the range that you want of color, then adjust…
    Andrew

  • Ryan Hill

    June 19, 2006 at 2:05 am

    Huh. I never noticed that part. Hue/saturation is much more complex than I remembered. Maybe I can get it to do similar to what I’m looking for.

  • Ryan Hill

    June 19, 2006 at 2:28 am

    So I duplicated the layer three times.
    I used hue/saturation on the middle layer, selected a large portion of the hue spectrum and desaturated that. Then, so it wouldn’t desaturate very saturated things, I used shift channels on the top layer so RGB was replaced with saturation. Then I used it as a track matte on the desaturated layer. I tweaked all of this with levels at various places, most importantly on the top layer. And we’re good.

  • Ryan Hill

    June 20, 2006 at 12:17 am

    Oooh. And I found another nice tool, Channel Combiner, which I could use to convert RGB to HLS, apply curves like Justin suggested, then convert back again.

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