Question about Levels Eyedroppers

PA
Posted By
pixel_a_ted
Jul 7, 2008
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2891
Replies
5
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Closed
Many sites discuss using all three eyedroppers to set black, neutral and white levels. Suppose you use the rightmost eyedropper and click on a part of the image that is supposed to be white. This forces this part to be white (provided you defined the eyedropper function to be 255,255,255) and presumably adjusts all other areas in the image accordingly. If you then also use the leftmost eyedropper to click on a black area, it makes that area black and presumably also adjusts all other areas. You could also choose the middle eyedropper to set an area of the image to neutral, again adjusting all other areas.

Doesn’t the action with one eyedropper somehow undo or conflict with the adjustment made with another eyedropper? Are you supposed to just use one eyedropper per image?

Thanks.
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MR
Mike Russell
Jul 7, 2008
On Mon, 7 Jul 2008 10:38:33 -0700 (PDT), pixel_a_ted wrote:

Doesn’t the action with one eyedropper somehow undo or conflict with the adjustment made with another eyedropper? Are you supposed to just use one eyedropper per image?

Yes, they do. Setting either endpoint, for example, resets the middle control points. So set the middle gray point last.

There are some other restrictions – for example the gray dropper is disabled in Lab mode, which is unfortunate because Lab is capable of setting an excellent neutral.

Curvemeister removes these restrictions, and adds the ability to pin to arbitrary hues, multiple neutrals, and other features.
—
Mike Russell – http://www.curvemeister.com
R
ronviers
Jul 8, 2008
On Jul 7, 12:38 pm, pixel_a_ted wrote:
Many sites discuss using all three eyedroppers to set black, neutral and white levels. Suppose you use the rightmost eyedropper and click on a part of the image that is supposed to be white. This forces this part to be white (provided you defined the eyedropper function to be 255,255,255) and presumably adjusts all other areas in the image accordingly. If you then also use the leftmost eyedropper to click on a black area, it makes that area black and presumably also adjusts all other areas. You could also choose the middle eyedropper to set an area of the image to neutral, again adjusting all other areas.
Doesn’t the action with one eyedropper somehow undo or conflict with the adjustment made with another eyedropper? Are you supposed to just use one eyedropper per image?

Thanks.

Hi,
This article talks about that.
http://www.ronbigelow.com/articles/levels/levels2/levels2.ht m
R
ronviers
Jul 9, 2008
I don’t know what the deal is but I posted this reply about two years ago and it just now showed up.

wrote:
On Jul 7, 12:38 pm, pixel_a_ted wrote:
Many sites discuss using all three eyedroppers to set black, neutral and white levels. Suppose you use the rightmost eyedropper and click on a part of the image that is supposed to be white. This forces this part to be white (provided you defined the eyedropper function to be 255,255,255) and presumably adjusts all other areas in the image accordingly. If you then also use the leftmost eyedropper to click on a black area, it makes that area black and presumably also adjusts all other areas. You could also choose the middle eyedropper to set an area of the image to neutral, again adjusting all other areas.
Doesn’t the action with one eyedropper somehow undo or conflict with the adjustment made with another eyedropper? Are you supposed to just use one eyedropper per image?

Thanks.

Hi,
This article talks about that.
http://www.ronbigelow.com/articles/levels/levels2/levels2.ht m
MR
Mike Russell
Jul 9, 2008
On Tue, 8 Jul 2008 20:31:54 -0700 (PDT), wrote:

I don’t know what the deal is but I posted this reply about two years ago and it just now showed up.

LOL – I amswered the darn thing too just yesterday. Blast from the past. —
Mike Russell – http://www.curvemeister.com
A
addictionshary
Apr 23, 2013
Suppose you use the rightmost eyedropper and click on a part of the image that is supposed to be white.

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