CS4 transition problem

Discussion in 'Photoshop Tutorials' started by Misifus, Jan 8, 2010.

  1. Misifus

    Misifus Guest

    Hi, I've been using PS since PS5, but I've got a problem with CS4 that
    I'm not finding a solution to.

    In previous CS versions, I've been able to find the darkest and lightest
    points in an image using a temporary Threshold layer. I launch the
    Threshold layer, and in the dialog box, I move the slider the the left
    until only the blackest spots are left. Then, I can hold down the Shift
    key and sample those spots, by clicking on them with the data for each
    spot showing up in the info window.

    I do the same with the lightest spots. Of course it varies with
    different images, but often these spots serve as good black points and
    white points. At this time, I cancel the Threshold layer and add a
    Levels layer in which I can manipulate the individual R, G, and B
    channels to produce good black and white points in the image.

    My problem is that in CS4, I can't find a way to identify these points
    once I've located them. The old "hold down the Shift key and Click"
    doesn't work anymore, and I haven't found another way to do the same thing.

    I've already spent the money for CS4, but I'm so used to my earlier
    workflow, that I find myself reverting to CS3 just for that function.
    Is there something I'm overlooking?

    Misifus, Jan 8, 2010
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  2. Misifus

    tony cooper Guest

    I use this technique frequently. Open the "Color Sampler Tool" (In
    the Eyedropper tool group) and click that on your blackest point and
    your whitest point. That will place a symbol and number on those

    The third step is the Dave Cross method to find the gray (midtone)
    point. Add a new layer over the other layers, fill it with 50% Gray
    (a drop-down in Fill), change Blend Mode to Difference for this layer,
    then add a Threshold adjustment layer over this. Drag the slider all
    the way to the left (image turns white) and the back right until the
    first area of black appears. Mark this with the Color Sampler Tool.
    Dump the fill and threshold layers.

    Your image now has three numbered marks...black, white, gray. Correct
    with a Curves adjustment.

    Here's Dave Cross's method explained by Kelby:
    tony cooper, Jan 8, 2010
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  3. Misifus

    Misifus Guest

    Thank you. I was familiar with the rest of the story, the grey point
    and using curves, but I couldn't figure out what you've just given me.
    Thanks, again.

    Misifus, Jan 9, 2010
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