Color sampler onto curve layer?

I believe I knew how to do this but the brain cell that had the information must have died......
I BELIEVE I used to take the color sampler and put a sample on my image. Then I created a curves layer. AND, by holding some combination of shift/ctrl/alt and clicking the color sample, the values would transfer to the red,green, and blue layers of my curves layer. From there I could make adjustments...
In CS4 I'm trying to do this, and I can't get it to work... It isn't the same as using the eyedroppers on the curve OR the hand above the eyedroppers. It actually copied the color sample values onto the individual color channels..... How do I do this in CS4?

OK, I may just be having an extraordinarily stupid day, so bear with me..........
The url's in the previous reply don't work any more - I presume this is because the forums have been reorganized?
But, beyond that - here's what I RECALL doing in the past.......................
In my image, create a color sampler point using the color sampler tool.
Create curve adjustment layer and make that layer the current layer.
Go back to my image and press ctrl+shift and click on the color sample.
This would put the rgb values (puts a point on the curve) from the color sample on the red, green, and blue channels of the curves layer.
After reading the last couple replies, I did the same thing. And I went "back to my image" and clicked on
the color sample. I'm STILL not getting the values on my curve layer......
What am I missing 'cause this can't be as difficult as I'm making it.........?

Similar Messages

Using color sampler values with curves adjustment layer

Hi, I have just started trying to teach myself javascript. Based on preliminary research, it's become apparent that there are many functions in Photoshop that are either extremely cumbersome or impossible to code by hand without using the Script Listener.
My goal is as follows: first, I will manually load two photos as layers in a single document. Then I will manually place two or more color sampler points on the document. At this point I would like the script to create a curves adjustment layer (ideally clipped to layer 2) and place as individual channel anchor points the RGB data from the color sampler points on Layer 2, and then adjust the output of the points on each channel to the color sampler RGB values of layer 1.
As my first script, I realize this is probably going to be a lot of work.
I did find some code that returns the average value of manually placed color sampler points. Conceptually then, I would need to add code which creates a new curves adjustment layer and adds those RGB values (from a specific layer) as anchor points on the individual channels, and then hides one layer and looks at the RGB values of the color sampler points, and uses them as the output values for each anchor point.
Sounds simple enough from a conceptual standpoint.
I'm looking for some guidance on how to get started.
Which parts will I definitely need Scriptlistener for and will that be adequate to do the job?
How would you recommend I get started on this?
Thanks very much for any input.

The function I had provided was an example into which you would need to feed the values you got with Mike’s code.
The code below would create a Curves Layer as shown in the screenshot, but I’m not sure it would work reasonably for all cases.
// with code by mike hale;
// 2012, use it at your own risk;
// call the function to run the script
#target photoshop
createCurveAdjustmetFromColorSamplers();
// create a function fo hold most of the code
function createCurveAdjustmetFromColorSamplers(){
    // first add some condition checks
    // needs an open document in a color mode that supports layers
    if(app.documents.length == 0 || ( app.activeDocument.mode == DocumentMode.BITMAP || app.activeDocument.mode == DocumentMode.INDEXEDCOLOR ) ){
        alert('This script requires a document in Greyscale, RGB, CMYK, or Lab mode.');
        return;
    // check for at least two colorSamplers
    if(app.activeDocument.colorSamplers.length < 2 ){
        alert('This script requires at least two colorSamplers.');
        return;
    // last check for at least two layers - assume they will be on same level( not in layerSet )
    if(app.activeDocument.layers.length < 2 ){
        alert('This script requires at least two layers.');
        return;
    // create varaibles to hold the colorSampler's color property for each layer
    // for the bottom layer
    var outputArray = new Array();
    // for top layer - array could also be created this way
    var inputArray = [];
    // store the number of samples because it will be needed in more than one place
    var numberOfSamples = app.activeDocument.colorSamplers.length;
    // hide the top layer
    app.activeDocument.layers[0].visible = false;
    // collect the samples from the bottom layer
    for(var sampleIndex = 0; sampleIndex < numberOfSamples; sampleIndex++ ){
        outputArray.push(app.activeDocument.colorSamplers[sampleIndex].color);
    // turn the top layer back on
    app.activeDocument.layers[0].visible = true;
    // collect those samples
    for(var sampleIndex = 0; sampleIndex < numberOfSamples; sampleIndex++ ){
        inputArray.push(app.activeDocument.colorSamplers[sampleIndex].color);
    // make sure the top layer is the activeLayer
    app.activeDocument.activeLayer = app.activeDocument.layers[0];
// create arrays of the color values:
var theArray = [[0, 0, 0, 0, 0, 0]];
for (var m = 0; m < inputArray.length; m++) {
theArray.push([inputArray[m].rgb.red, outputArray[m].rgb.red, inputArray[m].rgb.green, outputArray[m].rgb.green, inputArray[m].rgb.blue, outputArray[m].rgb.blue]);
theArray.push([255, 255, 255, 255, 255, 255]);
// sort;
theArray.sort(sortArrayByIndexedItem);
// makeCurveAdjustmentLayer();
rgbCurvesLayer (theArray)
////// make rgb curves layer //////
function rgbCurvesLayer (theArray) {
// =======================================================
var idMk = charIDToTypeID( "Mk " );
    var desc5 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref2 = new ActionReference();
        var idAdjL = charIDToTypeID( "AdjL" );
        ref2.putClass( idAdjL );
    desc5.putReference( idnull, ref2 );
    var idUsng = charIDToTypeID( "Usng" );
        var desc6 = new ActionDescriptor();
        var idType = charIDToTypeID( "Type" );
            var desc7 = new ActionDescriptor();
            var idpresetKind = stringIDToTypeID( "presetKind" );
            var idpresetKindType = stringIDToTypeID( "presetKindType" );
            var idpresetKindDefault = stringIDToTypeID( "presetKindDefault" );
            desc7.putEnumerated( idpresetKind, idpresetKindType, idpresetKindDefault );
        var idCrvs = charIDToTypeID( "Crvs" );
        desc6.putObject( idType, idCrvs, desc7 );
    var idAdjL = charIDToTypeID( "AdjL" );
    desc5.putObject( idUsng, idAdjL, desc6 );
executeAction( idMk, desc5, DialogModes.NO );
// =======================================================
var idsetd = charIDToTypeID( "setd" );
    var desc8 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref3 = new ActionReference();
        var idAdjL = charIDToTypeID( "AdjL" );
        var idOrdn = charIDToTypeID( "Ordn" );
        var idTrgt = charIDToTypeID( "Trgt" );
        ref3.putEnumerated( idAdjL, idOrdn, idTrgt );
    desc8.putReference( idnull, ref3 );
    var idT = charIDToTypeID( "T   " );
        var desc9 = new ActionDescriptor();
        var idpresetKind = stringIDToTypeID( "presetKind" );
        var idpresetKindType = stringIDToTypeID( "presetKindType" );
        var idpresetKindCustom = stringIDToTypeID( "presetKindCustom" );
        desc9.putEnumerated( idpresetKind, idpresetKindType, idpresetKindCustom );
        var idAdjs = charIDToTypeID( "Adjs" );
            var list1 = new ActionList();
                var desc10 = new ActionDescriptor();
                var idChnl = charIDToTypeID( "Chnl" );
                    var ref4 = new ActionReference();
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idRd = charIDToTypeID( "Rd " );
                    ref4.putEnumerated( idChnl, idChnl, idRd );
                desc10.putReference( idChnl, ref4 );
                var idCrv = charIDToTypeID( "Crv " );
                    var list2 = new ActionList();
// add r points;
for (var m = 0; m < theArray.length; m++) {
          addCurvePoint (list2, theArray[m], 0)
                desc10.putList( idCrv, list2 );
            var idCrvA = charIDToTypeID( "CrvA" );
            list1.putObject( idCrvA, desc10 );
                var desc15 = new ActionDescriptor();
                var idChnl = charIDToTypeID( "Chnl" );
                    var ref5 = new ActionReference();
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idGrn = charIDToTypeID( "Grn " );
                    ref5.putEnumerated( idChnl, idChnl, idGrn );
                desc15.putReference( idChnl, ref5 );
                var idCrv = charIDToTypeID( "Crv " );
                    var list3 = new ActionList();
// add g points;
for (var m = 0; m < theArray.length; m++) {
          addCurvePoint (list3, theArray[m], 2)
                desc15.putList( idCrv, list3 );
            var idCrvA = charIDToTypeID( "CrvA" );
            list1.putObject( idCrvA, desc15 );
                var desc20 = new ActionDescriptor();
                var idChnl = charIDToTypeID( "Chnl" );
                    var ref6 = new ActionReference();
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idChnl = charIDToTypeID( "Chnl" );
                    var idBl = charIDToTypeID( "Bl " );
                    ref6.putEnumerated( idChnl, idChnl, idBl );
                desc20.putReference( idChnl, ref6 );
                var idCrv = charIDToTypeID( "Crv " );
                    var list4 = new ActionList();
// add b points;
for (var m = 0; m < theArray.length; m++) {
          addCurvePoint (list4, theArray[m], 4)
                desc20.putList( idCrv, list4 );
            var idCrvA = charIDToTypeID( "CrvA" );
            list1.putObject( idCrvA, desc20 );
        desc9.putList( idAdjs, list1 );
    var idCrvs = charIDToTypeID( "Crvs" );
    desc8.putObject( idT, idCrvs, desc9 );
executeAction( idsetd, desc8, DialogModes.NO );
return app.activeDocument.activeLayer;
////// add curve point //////
function addCurvePoint (theList, valueHor, theNumber) {
var desc11 = new ActionDescriptor();
var idHrzn = charIDToTypeID( "Hrzn" );
desc11.putDouble( idHrzn, valueHor[theNumber] );
var idVrtc = charIDToTypeID( "Vrtc" );
desc11.putDouble( idVrtc, valueHor[theNumber+1] );
var idPnt = charIDToTypeID( "Pnt " );
theList.putObject( idPnt, desc11 );
////// sort a double array, thanks to sam, http://www.rhinocerus.net/forum/lang-javascript/ //////
function sortArrayByIndexedItem(a,b) {
var theIndex = 0;
if (a[theIndex]<b[theIndex]) return -1;
if (a[theIndex]>b[theIndex]) return 1;
return 0;

CS4 - Color Sampler readout with Adjustment Layer selected?

I'm not sure if this is a setting, or a bug, or the way adobe intended it, but perhaps some of you may know.
In Photoshop CS4, I have a few color samplers around the stage. I notice that the color readouts require that I make some adjustments using a curves layer. I add the curves adjustment layer and start to make adjustments. The only problem is that while I have an adjustment layer selected (so I can make changes to it) my color sampler readouts in the info panel display blank.
In previous version of photoshop this was not the case as you could open the adjustment dialog without actually having that adjustment layer selected. I love the new adjustment layer panel, but its really frustrating having to make some changes to an adjustment layer and then select another layer to see what those changes did to the color samplers, and back and forth, and back and forth.
Does anyone have a fix for this? Is it a bug? Is there a reason that CS4 functions this way?

I'm not sure if this is a setting, or a bug, or the way adobe intended it, but perhaps some of you may know.
In Photoshop CS4, I have a few color samplers around the stage. I notice that the color readouts require that I make some adjustments using a curves layer. I add the curves adjustment layer and start to make adjustments. The only problem is that while I have an adjustment layer selected (so I can make changes to it) my color sampler readouts in the info panel display blank.
In previous version of photoshop this was not the case as you could open the adjustment dialog without actually having that adjustment layer selected. I love the new adjustment layer panel, but its really frustrating having to make some changes to an adjustment layer and then select another layer to see what those changes did to the color samplers, and back and forth, and back and forth.
Does anyone have a fix for this? Is it a bug? Is there a reason that CS4 functions this way?

Color sample reading funniness?

I am using CS4 and have been using PS since version 1.0. There is one thing about the way CS4 handles color samples that is different than previous version. If I have 3 different adjustment layers and check my color samples, the numbers will change depending which adjustment layer I am on. This doesn't make any sense and makes it harder to adjust color and tone. I am intersted in the final color with all of my adjustment layers combined. If I am trying to match color between files and I have a saturation adjustment layer and a curve adjustment layer above that, and I am keeping an eye on my color samples, if I adjust the saturation layer there is no easy way of seeing exactly what the numbers. While I am on the saturation layer the numbers night be 206,250,77, but then when I click on the curves layer the numbers are 219,251,96. So to really know what the numbers are you need to be on the top most layer. It was never like this before. I know this is normal opporation for CS4, but how are others dealin with this?
Another strange thing I found, and this is just with a particular file, but when I hover the color sample tool about an are I get different numbers under the eye dropper info and I do under my color sample point info. The shot is of a pair of jeans, and it's a pretty large file, around 26"x21"@300dpi. I have my eye dropper sample point set to 101. When I first hover the eye dropper abover the area I want to sample the reading in the upper left of the info pallete is 102,120,153 then as soon as I click the color sample point reading is 150,169,204. This was done on just the background layer, no other layer have yet been added. I even tried blurring the area to get rid of any texture, but still the same issue.
Well I just figure out what the issue is but I thought I would post this anyway. I found out if I zoomed into 100% first, then placed the sample point it worked like it is suppose to. I know that viewing both color and sharpness can vary slightly when your not at 100%, but I didn't think that it would effect the actual numbers?

I agree an altarable "Funny Factor" woud be a useful addition for CS5. Maybe a dial of some sort, turn it up and its funny, down and its not so funny.
Look at your eyedropper options there are checkboxes for Sample all layers and "sample size"

Persistent color sampler from cameraraw to XMP

The samplers created inside cameraraw plugin don't stick between cameraraw sessions, loosing the color values read before to compare afterwards.
For example, when I open images on photoshop as smart objects using cameraraw and create color samplers, and I re-edit the smart object layer (using cameraraw again) the samplers aren't there any more.
Some times the new color sampler position isn't same anymore and the reading of the color values change. And that betrays the potential of intelligent objects.
XMP would assume the position and the color values, and that could be even read later from photoshop script to pass it to the same color sample tool (but this would be another potential addition not regarding the problem here).
I invite you guys to vote 'Like' on this request, using this link (adobe login):
http://gsfn.us/t/4m13u

OK, I may just be having an extraordinarily stupid day, so bear with me..........
The url's in the previous reply don't work any more - I presume this is because the forums have been reorganized?
But, beyond that - here's what I RECALL doing in the past.......................
In my image, create a color sampler point using the color sampler tool.
Create curve adjustment layer and make that layer the current layer.
Go back to my image and press ctrl+shift and click on the color sample.
This would put the rgb values (puts a point on the curve) from the color sample on the red, green, and blue channels of the curves layer.
After reading the last couple replies, I did the same thing. And I went "back to my image" and clicked on
the color sample. I'm STILL not getting the values on my curve layer......
What am I missing 'cause this can't be as difficult as I'm making it.........?

Color Sampler Tool bug?

Am I nuts here, or is this something with my particular machine? I'm running Photoshop CS4 (11.0.1) and I'm seeing the following:
Create a new image.
Add a folder.
Add a mask to that folder (I've done this with a raster mask, not a vector)
Create an adjustment layer inside that folder (I've tried this with curves, hue/sat, and/or channel mixer).
Duplicate the folder, and invert the mask on the copy.
Highlight an adjustment layer (either one).
Put out a color sampler inside the area masked by the current folder/adjustment layer. This becomes sampler #1. This shows the current values (correctly).
Put out a color sampler OUTSIDE the area masked by the current folder/adjustment layer. This becomes sampler #2. This shows no values (correctly).
Highlight the adjustment layer in the second masked folder.
Both samplers now show no value (incorrect).
Delete sampler #1. The new #1 now shows the current values (correct).
Recreate the other sampler (now at #2). Sampler #2 does not show color values (correct).
Highlight the first adjustment layer again.
Both samplers now show no value (incorrect).
It appears that *all* color samplers are either using the masked area of sampler #1, or combining the masked area of all lower numbered samplers, to determine if they should calculate values. The workaround is to remove all samplers every time you switch masked folders (which can get a bit insane if you have a lot of masked folders). This is not the way it worked in CS3.
Can anyone else duplicate this issue? Or is this unique to my machine? I'm running a fresh install (less than a week old) on Mac OS X 10.5.8, and I've updated to PS 11.0.1.
Message was edited by: achbed
Added version information

Simply put: Color Samplers will report no information with a Color Adjustment layer selected if it is contained in a masked Group and if the #1 Color Sampler is in the masked region.
The cursor sampler WILL work however. Unfortunately, I often need the mouse elsewhere while making adjustments.
This makes working in masked groups quite bothersome so any help would be appreciated.

Marking points on a curves layer

ive always adjusted dynamic range by doing a CURVES layer
then alt-clicking on a photo to mark the points on the curve, then
stretching the points apart. that was cs3...
now in cs4 that no longer works; i cannot alt-click on photos
to mark points on a curve, i have to add a step of clicking on that
'pointer-finger' icon in the curves dialog in order to mark points
(personally the old way shouldve not been removed; 'adding' a step
to mark points is not really progress to me).
now that theyve added an extra step of having to click on the
finger-point icon to mark points on a curve, is there a way i can
add this icon to the configurator?
AND
is there a bit of coding which can allow someone at least to
mark a point on the curve AND mark that same point with a color
sampler point? that way i can see on the curve where i am as well
as see on the photo where i am; otherwise i have to mark it on the
curve than mark that same point again with the color sampler
point....this option shouldve been some ALT or CTL addon to marking
curve points, so one can do both at once. so can this be done with
a single configurator tool, marking both at once?
tx for anyone who finds the solution, unless there is some
way of marking points on a curve and im just overlooking it, all i
know is the old quick way no longer works...

I agree Gary that in some ways the new curves is worse than
the old CS3 modal curves dialog, for the reasons you have said. Did
you know that you can still bring up the old curves dialog? which
still has the command place points shortcut, and the control TAB
shortcut to switch between points - if you record an action in CS3
and read the action into CS4 yoyu will find it brings up the old
dialog. These actions can of course be assigned to F key shortcuts.
There is also a configurator panel that John Knack put on his blog,
which has buttons to do the same thing.
Incidentally its the command key and not the option key that
used to place points

Problem with Color Sampler Points

I'm using PSCS4 on a Mac Pro, and recently upgraded to Snow Leopard 10.6.3 from Leopard 10.5.8.
I regularly use color sampler points in Photoshop when adjusting curves. I seem to be having problems getting a sampler point to show up in the info palette when shift-clicking with the eye-dropper tool, or directly using the color sampler tool. I've also tried shift-clicking from within the Threshold command, but the points I click just don't seem to take a sample and show up. I never had this problem before. I'm bringing RAW, sRGB and ARGB digital images into PS from Bridge, and have tried 8 and 16 bit.
After trying for awhile, sometimes it just suddenly starts working again. For instance, I was writing this post after not being able to get PS to take samples. Then I went back and forth between the internet and PS, and it started working all of a sudden. Very odd.
Anyone else seeing this? Am I doing something wrong? Any workarounds?
Thanks, Lou

Thanks, Mark. You may be right, and I will try it.
I have my workspace setup saved, but I presume it is lumped in with all the other preferences. Is there a way to "Export" my saved workspace setup from Photoshop, so after I trash my preferences, I can reimport at least my workspace? I didn't see the ability to do that, but it may be hiding somewhere. I like my current dual monitor setup and prefer not to have to 'redo' it from scratch.
Thanks,
Lou

Recreating merged curves layer by guesswork

Hi folks, I have a picture I once added a curves adjustment layer to. Unfortunatley I don't have the .psd anymore, only a composite .png (the final image) and the source image.
I tried to recreate the curves adjustment layer on top of the source image and compare it to the final image, but I don't get anywhere close to it. I must say though, that generally speaking I have decent curves skills I would say, I intuitively know how they react and affect the output. But the curves layer I used back then involved independent R,G and B curves plus a RGB curve, with about 3 to 4 control points each.
So intuition and guesswork didn't get me anywhere, that's why I was wondering if there was something like a more strategic method defined by rules which would inevitably lead to the correct result if followed correctly ?
If not, is there a different way of recreating the final image from the source image?
Many thanks.

If its just one curve, you can probably do it. But all three, plus a master adjustment might prove too much if the change were drastic. Still worth a go. Even if you just place the 4 color samplers in quarter tones, you might have some luck.
As I said above, it doesn't matter whether it's 1 or 3 curves, because
the RGB channels are treated independently (both by color picker and the
curves layer). The master adjustment is more problematic, right,
but theoretically it shouldn't be a problem either, because two curves
can be "merged" ... well, not in Photoshop (I might suggest that as a
feature one day), but mathematically.
Curves are functions. Take an easy function like f(x) = 1.5*x + 2x
this equates to: f(x) = 1.75 * x
(where x = input and f(x) = output in Photoshop curves adjustment)
I have started working with this method and so far it looks promising,
hope it turns out right
I'll let you know
You inspired me to finally get at what Martin Evening was doing below. If you only had a gray strip in each channel...
http://photoshopnews.com/2007/09/05/how-to-express-blend-modes-as-curves/
Looks very interesting. I'll have a look at it one rainy day ...

In Katie's Cafe tutorial, how did she create her color sample?

In the Adobe Muse tutorial for Katie's Cafe. How was the color sample created. She just had us drag it onto our Muse document, but how was the color palette created initially so that it can be used in your Muse document?
Thanks!

I think I figured out the solution to the problem people are having. It has to do with the order that you do things when you try to bring in colors from somewhere else. If you try to just take colors from somewhere else (ie copy and past them) muse will not recognize them as swatches and even if you take the colors and put them in rectangles in muse and save them to a library muse will still not recognize them as swatches. What you have to do to create a color set like she did in the tutorial is as follows....
Copy/Paste your colors into muse
Make rectangle objects in muse that contain the colors
Open up the swatches window and click add swatch
Select one of the colors you added - click ok
Repeat this process for all the color rectangles you have made
Now you can use the selection tool to select all the colors you made and create a library with them that will work.
The issue people seem to be having (and that I myself had) is that when you just copy/paste colors into muse it does not automatically make a swatch for the new color. When she uses the swatch library in the demo it does add the swatches automatically. This happens because she went through the process of creating the swatches in muse first (which you are never shown) and not just copy/pasting the colors from some other program.

Color Matching using Color Sampler Tool?

Let's say I want to replace a sky in a landscape with a more interesting one with clouds. Is there a way to match the luminosity and hue of the replacement sky to the original landscape by using the color sampler tool? That is, to do the color matching by the number rather than by experimenting with various adjustment layers to get the match? Thanks!!

Perhaps you could put the new sky on top with luminosity blend mode. The color of the old sky would show through. But this would invariably require brushing.
Replace Color is a better option. In the dialog, set the source color (in sky with clouds) at the top. Destination color (sky without clouds) at the bottom.
Unfortunately this adjustment is not available as an adjustment layer. You'll want to keep the original image, perhaps as an underlying layer, in case you need to go back to it.

"color sampler tool" equivalent in color?

Hi,
Is there an equivalent to the 'color sampler tool' found in Photoshop in Color? I'm looking for a way to sample a pixel or small group of pixels (maybe a 5x5 square?) in a given frame and get numerical RGB data for that sample, but cant seem to find a tool in Color. Does a feature like this exist in Color (and if not, is there a workaround that would give me similar information)?
thanks in advance!

You can't get an "integrated" medially-dimensioned RGB value picker, but there are three single-pixel samplers available in the RGB scope display. They are explained in the manual as to use, etc.
These numbers are useless in 999,999 out of a million cases. COLOR is not Photoshop, and I don't know many colorists who paint by numbers. "Many" being the numeral "zero". Why, is because there is no "match" tool, and there is no method for directly entering values... only offsets, which is going to be a "poke it and see" kind of process. The only useful application for a COLOR pixel scrub is within Secondaries, which will place a cursor on the HSL curve adjustment windows, so that operator's aren't just stabbing wildly at that adjustment...
jPo

Color sampler in ActionScript 1

Hi everyone,
I am trying to create a color sampler in AS1. The reason why
I am using AS1 is that I develop for Handhelds Pocket PCs where the
FP7 is so bad that it cannot be used properly. As a result, our
only option if FP6 and AS1.
Basically, I am trying to find a way to get the RGB value
color from wherever the mouse goes.
Could someone guide me a little on which solution I should
use ?
Thanks

When you add an adjustment layer, the layer mask is automatically active. You need to activate the pixel (image) layer by clicking on it in the Layers panel.

Scripting colorsamplers to sample only active layer

In the menu bar of CS6 for the color sampler, it has a feature for sample all layers or current layer. While this feature allows you to sample forground and background colorrs this way, the info panel still shows the all layers color value. Is there any way to script the color sampler so that you can read the values of one particular layer without having to turn off visalility on all other layers?

Yes, toggling on and off the all the layer's visibility was one way I was thinking about getting around having to use a second document. I was also thinking about having the sample layer on top then have the script work below that layer. It would just be nice to be able to specify a particular layer for sampling such as:
var layerSample = docRef.sampleLayer.colorSamplers(pointLocationArray)
Here's a sample of what I'm playing with. It samples a reference image then randomly draws and places rectangles and applies a gradient based on the color samples of the reference image. Once the rectangles are drawn, further sampling would capture the retangles, so that's why it would be nice to be able to sample the background layer or some other layer.
http://www.flickr.com/photos/7872516@N05/8519085254/

Color Sampler not working outside my window! Urgent, please help!

I just installed Photoshop on my Surface Pro 3. I am doing a presentation in a few hours where I will need to be able to demonstrate the use of the Color Sampler outside the window. It doesn't work. It goes up to the edge of the workspace but does not sample beyond that. I've tried using the pen, the trackpad and the mouse. None of them work. If I try to do it on my Windows 8.1 desktop, it works fine. Help!

Just looked into this and have found a resolution. Always learning new tricks!! So forgive me I was wrong in the first post.
You CAN do it by clicking within the workspace and then dragging outside so continually holding down then letting go outside the workspace.
Colour sampling outside Photoshop | Shape Shed
Hope this helps!

Color sampler onto curve layer?

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