Converting CMYK color model vlaues (0-100) to liquid color volume using labview

Hellow all,
How I can convert CMYK color model vlaues (0-100) to liquid color volume using labview?
best regards

What does "liquid color volume" mean?
You should continue in your original message thread and not create a new one. CMYK colors mixing icon or vi

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'Convert CMYK Colors to RGB' still runs havoc in 9! (Plus a PDF version problem)

This post is to warn people about severe issues, and how to avoid them. Issues with the CMYK color setting in FM9.x have been reported here earlier, such as:
http://forums.adobe.com/message/1237696#1237696
http://forums.adobe.com/message/1237852#1237852
http://forums.adobe.com/message/1237165#1237165
However, I do not think this issue has been warned about anywhere near as much as it should have. And, as usual, Adobe is silent (they should have a big poster on their site warning about this issue! And they have even claimed that patches have "solved" the issues with CMYK).
Just recently, while experimenting with FM9 again, I had extreme problems, which, at first, seemed totally unrelated to this CMYK setting. But after having struggled extremely hard for many many many hours, I finally found out. Now is the time to inform others:
First a note about versions: FrameMaker 9.0p237, Acrobat Distiller 9.1, XP SP2
It looks perfectly okay on screen in FrameMaker, exactly as in FM8. But when saved as pdf, several things are "corrupted". Examples: no kerning after the letter 'T', such as the word 'Text'. Dotted leader for a right aligned tab disappears. Some objects from the master pages, such as a logo, become enclosed in a rectangle (a border of the frame/object), but it only happens on *some* body pages, whereas other body pages using the same master page are ok!!? Equations are formatted differently from the way they should, with the wrong font for number, etcetera.
Solutions:
1. When 'Save as PDF...', untick 'Convert CMYK Colors to RGB' in PDF Setup. Same setting is in the file's 'Format > Document > PDF Setup...'
A drawback with this method is that, as of Acrobat Distiller v9, it does not seem to respect the pdf version specified in the PDF job Options! I get PDF 1.6 with this method, despite my job option specifies version 1.5. (This happens also with FrameMaker 8 if Acrobat is v9.) So you *have* to optimize it in Acrobat in order to get a web friendly PDF (PDF 1.4 or 1.5).
or
2. Print to 'Adobe PDF'.
In this latter case, you can set the same 'PDF Setup' settings under the button 'Setup...', EXCEPT that there is no tick box for 'Convert CMYK Colors to RGB', and it does not matter what setting you have chosen in the file's 'Format > Document > PDF Setup...', it will be RGB conversion in any case. Make sure that after you exit the setting, the tick box for 'Print to File' is NOT ticked! This method respects the pdf version specified in the PDF job Options! I get PDF 1.5, which is what my job option specifies.
(For some reason, Acrobat/Reader does not render these two PDFs exactly the same, except in extreme magnification! Maybe it has to do with the different PDF versions of the files.)
In either case, the solution actually solves ALL problems I listed! Despite it seems to have absolutely nothing whatsoever to do with colors! Some day in the distant future, CMYK might actually work! But, for myself, I would prefer a proper color management instead...
Best Regards,
/Harald

Oops!! Not until now I discover that under 'Solutions' I happened to write 'untick' where it should be 'tick'! I.e, colors SHOULD be converted to RGB in order to circumvent the problems! I.e it runs havoc in v9 when CMYK colors are NOT converted to RGB! Don't know how I came to write the opposite, but probably I started out by describing the situation where the problems are seen rather than describing how to avoid them.
Equally strange is that nobody corrected me, but perhaps the mistake was so obvious? (But whether you see problems or not might depend on what fonts you use. So, under certain special circumstances, CMYK might actually work without these reported problems.)
I am also a bit surprised that others haven't reported the issue that the PDF version set in PDF job Options isn't respected when using 'Save As PDF' and Acrobat 9? (Or maybe someone has, but I have missed it.)

FM10 Crashes when Convert CMYK colors to RGB selected

Hi folks,
I have searched for info on this issue and found a couple of items but I'm still having problems doing what I need to do.
First off, FM 10 version is 10.0.2.419. PC is Dell E6420 laptop, Win 7 SP1, 8GB RAM, big hard drive. No existing Adobe software before installing TCS 3.0 from local files (copied from DVD).
At first I could not create a pdf (using File > Save as PDF) at all on this system (my old XP system still works fine with TCS 3.0). Instant crash and error messages (Internal error 10024, 7687848, 7688138, 10076935.). After reading the discussions, I cleared the check box for Convert CMYK colors to RGB, which allowed me to create the pdf. However, my colors are washed out completely. So I need to be able to select this check box without the crash.
Any suggestions?
Thanks!

(1)     Although FrameMaker 10 is a 32-bit application, there was no issue with it running under Windows 7 64-bit. You certainly don't need to run it under any XP mode!!!!
(2)     There were any number of save as PDF bugs in FrameMaker 10 that were fixed in various updates, but typically they were associated with when one didn't check that convert CMYK to RGB option (that uses the native Windows GDI for PostScript creation).
(3)     Rather than printing to File and distilling, try printing directly to the Adobe PDF PostScript printer driver instance.
          - Dov

Why Illustrator CS6 convert CMYK to RGB when I do "Add to switches" in Color menu?

1. Open Color menu and work with color in CMYK.
2. Do "Add to switches" (or "Создать новый образец" in Russian)
3. See that new color was added like RGB not like CMYK.
4. When I open parameters it show me HSB options.
5. I switch it to CMYK and push OK
6. Nothing cange - RGB in name and HSB in options.
Look like it's error.

I found what change it to normal way, but logicaly it's should not be a reason for autoconvert colors. If I choose CMYK and want add CMYK color it should be CMYK (in name minimum) and not RGB.
File->Documents Colors->CMYK(should be, but RGB was)
Right now options open like CMYK, not HSB. But if I want color in RGB it added like CMYK. Options like in CMYK, not HSB, again. Still look like error.

Why do Adobe Color CC and Indesign CC not convert CMYK to RGB the same?

I recently used Adobe Color CC to create a color theme that will be used for both print and web. I created the theme with approved CMYK values with the intent of saving the .ASE file to be imported into other CC apps. Corresponding RGB, Hex, Lab and HSB values are automatically created. Of course, we are using CMYK for print and RGB for web
A coworker had separately created the same exact CMYK theme in InDesign CC, and created RGB values from the same exact CMYK values I had used in Adobe Color.
The InDesign RGB values are quite different from the Adobe Color values.
Anyone know why the values are not the same, and moreover, which CMYK to RGB conversion values may be relied upon for accuracy?
EDIT: I guess the real question should be, What are the color management settings built-in to Adobe Color CC, and can they be duplicated in desktop Adobe CC applications?
Thanks very much

I found what change it to normal way, but logicaly it's should not be a reason for autoconvert colors. If I choose CMYK and want add CMYK color it should be CMYK (in name minimum) and not RGB.
File->Documents Colors->CMYK(should be, but RGB was)
Right now options open like CMYK, not HSB. But if I want color in RGB it added like CMYK. Options like in CMYK, not HSB, again. Still look like error.

Convert CMYK+SPOT (only selected bands) to RGB

Hello,
My context:
I am dealing with multi-band TIFF files - CMYK + one or more SPOT colors.
I am able to read the multi-band TIFF file using JAI and read the number of bands correctly.
Also, I can read the value for any band for any pixel.
For the SPOT colors I have Pantone CMYK equivalents.
The bands are 8 bit in size.
My problem:
I need to be able to show/hide one or more bands and display the result.
Is there a (mathematical) formula for converting CMYK+SPOT color bands to the RGB color space?
A simple example:
(CMYK scale 0-100)
All bands: C, M, Y, K, SPOT1 (C=100,M=100,Y=0,K=0), SPOT2(C=100,M=0,Y=100,K=0)
Bands selected: C, M, SPOT1
PixelX values: C = 50, M = 10, SPOT1=80
Can we calculate PixelX's RGB values to display on screen?
Is there any documentation I can read anywhere on the subject?
Thanks in advance,
Georgi

While I have never tried it, you might find this interesting: [cmyk to rgb|http://bytes.com/topic/java/answers/16180-rgb-cmyk].

Photoshop Save As PDF Settings Text loses 100% Black or Color Density is too High

I am taking a CMYK Photoshop file and saving it as a PDF for a magazine.
By request, the company has asked that the color density does not exceed 260%. In the output setings of the Save Adobe PDF dialog box, under color, I have:
Color Conversion: Convert to Destination
Destination: U.S. Web Uncoated v2 (told to me by the magazine to use)
Profile Inclusion Policy: Include Destination Profile
When I create the PDF, SUCCESS!!! it works where the color density is under 260%.
I verified in Acrobat Pro X by going to View / Tools / Print Production / Output Preview with the following settings:
Simulation Profile: U.S. Web Uncoated v2
Sample Size: 3x3
Total Area Coverage checked and set to 260%
HOWEVER, when I do this, the text goes from CMYK 0 0 0 100 to using all four colors. I have been recommended by the company to keep pure back on the text due to possible registration errors.
If I export out to PDF using the "PDF/X-1a" (inside photoshop pdf export), then I can get the text to keep 0 0 0 100 but the color density goes way over 260%.
Has anyone had this problem? I cannot get the color density to stay under 260% AND keep the text to 100% black.
Any help is always greatly appreciated.

Thank you Mylenium for your reply. What you have said makes sense but I am not sure how to implement it. I did a google search on Photoshop Multichannel mode and I did really find anything helpful or relevant.
I tried playing with the multichannel just the same. I made a copy of my photoshop document first (just in case I screwed up my file) and I converted it to multichannel mode from the current CMYK. (Image / Mode / Multichannel) Under "Channels" I looked at each layer (Cyan, Magenta, Yellow, and Black) individually and the text and other black areas in question were only on the black channel as it should be. Now that I am in multichannel mode, I cannot "Save As" a Photoshop PDF file so I had to do a Print to PDF option. I used the same export setting (or as close that I could tell) that I was using before and I still ended up with the same problem. My color density is under 260% but my black text is using 4 channels.
I also noticed that when I converted to Multichannel mode, the color of the image did change / shift a bit which also has me a bit worried.
Can you describe how I am to implement Multichannel mode to get my desired output? Also, can you elaborate on "custom channel for text blacks"?
I appreciate the help, thank you!

How to convert CMYK to RGB programmatically.

Hi,
I have a CMYK colorspace in indesign, i want to convert that as RGB color space, I got some codes, but I am getting incorrect data.
Some of the codes which I tried are given below
        double cyan = 35.0;
        double magenta = 29.0;
        double yellow = 0.0;
        double black = 16.0;
        cyan = Math.min(255, cyan + black); //black is from K
        magenta = Math.min(255, magenta + black);
        yellow = Math.min(255, yellow + black);
        l_res[0] = 255 - cyan;
        l_res[1] = 255 - magenta;
        l_res[2] = 255 - yellow;
@Override
    public float[] toRGB(float[] p_colorvalue) {
        float[] l_res = {0,0,0};
        if (p_colorvalue.length >= 4)
            float l_black = (float)1.0 - p_colorvalue[3];
            l_res[0] = l_black * ((float)1.0 - p_colorvalue[0]);
            l_res[1] = l_black * ((float)1.0 - p_colorvalue[1]);
            l_res[2] = l_black * ((float)1.0 - p_colorvalue[2]);
        return (l_res);
The values are C=35, M = 29, Y = 0, K = 16 in CMYK color space and the correct RGB values are R = 142, G = 148, B = 186.
In adobe indesign, using swatches we can change the mode to CMYK or to RGB.
But I want to do that programmatically, Can I get any algorithm to convert CMYK to RGB which will give the correct RGB values.
And one more question, if the alpha value for RGB is 1 then what will be the alpha value for CMYK?
Can anyone help me to solve these issues... Thanks in advance.

All you have to do is loop thru the swatches and change the space to RGB. Below is an AppleScript, but it shouldn't be too difficult to come up with the equivalent JavaScript. Your document's assigned RGB space will determine what RGB space the CMYK converts to, so if you are looking for sRGB, then Edit>Assign Profiles...>Assign Profile: sRGB
tell application "Adobe InDesign CS3"
tell document 1
repeat with a from 1 to count of every swatch
try
set space of color a to RGB
end try
end repeat
display dialog "All swatches have been converted to RGB color"
end tell
end tell

Converting CMYK PDF in InDesign to only hold 2 PMS / Black.

I've been given a PDF file to place in InDesign that has bleeds and needs to carry only three colors. PMS 185c, PMS 300c, and Black.
However the original PDF file the client sent has a logo on the cover and back cover that holds CMYK and a third PMS color. It's a pink PMS color (that I've been able to remove from the swatch panel), however when told to replace the color with PMS185, it still remains pink.
I've pulled the PDF file into Photoshop to fill the logo with the correct PMS 185 c red, however Photoshop auto converts the entire file into CMYK.
Is there a way to export the InDesign document as a PDF to only carry the three colors (replacing any left over colors / CMYK to just the two Pantones and Black)?
I've tried pulling the document into Illustrator as well, but it would require me to trace and redesign the logo in order to set it to PMS 185 c.
I just need a quick way to format all the colors to just Black for text, then PMS 185c and PMS 300c for the remaining images.

I've pulled the PDF file into Photoshop to fill the logo with the correct PMS 185 c red, however Photoshop auto converts the entire file into CMYK.
You need to create a spot channel in Photoshop for the red in the logo. It would look something like this where the image is only on the Black and 185 channel:
And not this which is probably what you have:
When you place the PSD with the spot channel in ID it will separate correctly like this:

Photoshop in Adobe RGB 16 bit don't fill a layer with paint bucket and a color 35.40.35.100.

I create a new file in RGB profile Adobe RGB 16bit
take the paint bucket and fill the layer with a color created by selector with the following parameters 35.40.35.100 CMYK and RGB corresponds to 24.20.18 the result is a full level of color 76.73.63.9 but in RGB corresponds to 24.20.18 because the values in cmyk not match ??

Could you please post screenshots (with the pertinent Panels visible) to illustrate the issue?
Are you not aware that you cannot reliably define a CMYK color in RGB because the transformation is performed through the Profile Connection Space (Lab) and depends on the involved Color Spaces/ICC profiles (edited) and the Color Settings?

Which color models do Premiere Pro and After Effects use?

hello,
I had a problem with a psd-file that I used in Premiere and AE: when I imported the AE-composition with the mentioned psd-file into my Premiere-sequence, where the psd-file was also used, the color of my psd-file looked different. It seemed that the two "instances" of my psd-file did use different color models.
On the Adobe-help-page I found an entry with the following info: "... After Effects works with the RGB (red, green, blue) color model. AdobePremiere Pro, however, works with the YUV color model. When you work with a dynamically linked composition, Adobe Premiere Pro either converts it to YUV or retains the RGB colors, depending on the output format." (http://help.adobe.com/en_US/premierepro/cs/using/WSbaf9cd7d26a2eabf53ab041041081290f-7fe8. html)
BUT: I found another entry in which it says that "... Premiere internally works with RGB..." (http://help.adobe.com/en_US/premierepro/cs/using/WS6693F22C-C06E-431a-A634-62343C65BA7B.ht ml#WSbaf9cd7d26a2eabf53ab041041081290f-7fbb)
Can somebody help me?

I believe Premiere Pro will keep the YUV color space on all YUV material (normally only video, still images are usually RGB) for as long as it can, all the way through the pipeline to export. But there are some things which can force an internal RGB conversion, like the addition of an effect which does not work in the YUV space. So far as I'm aware, once converted to the RGB space, it will stay there until an export forces a conversion to another color space.
So the PSD should start out as RGB and stay there both in AE and PP, until an export to a YUV format forces a conversion.
The difference you see between the programs may come about because AE is color managed, whereas PP is not.

Installing Mac OS 8.6 on iMac G3 (333 Mhz- "Fruit Colors" Model)?

Hello! I have an old iMac G3, the 333 Mhz model, that was a part of the "Fruit Colors" models that came out in the middle half of the 1999 model year. While going through and deleting some of the old files on my old iMac, I assume that I actually deleted some of the software that is responsible for the OS to function. (I thought that it could have been that I needed to reset the PRAM, and then I thought that the PRAM battery may have died... But I reset it and replaced the battery and it's still not working.) The next time I tried to use it, it proceeded to make the startup chime, but then it came up with the Macintosh emblem, followed by a question mark (This I know, means that it cannot find the OS, or all of what it needs for the OS to function). Now my problem is, how will I get 8.6 back onto it when I cannot even access the internet (I have misplaced the original install and restore CD's that came with it originally). I have thought about installing a OS X Panther onto it, but was wondering if I could do that even if I had OS 8.6 on it? Please help.

iMac 333 MHz
iMac Firmware Update 1.2
60384
iMac 266 MHz
iMac Firmware Update 1.2
60384
iMac 233 MHz
iMac Firmware Update 1.2
60384
from
http://docs.info.apple.com/article.html?artnum=86117
I'm not certain what "3.0.f3 built" means. I understand that you have a tray loading machine. A plastic tray comes out where you drop in a cd.
I'd guess you are OK.
Most people use these machines to run classic. Should be able to run any version of 9.x.
Robert

Converting RGB images (sRGB or Adobe RGB) to 709 color space.

I'm trying to determine the correct way to convert RGB images (sRGB or Adobe RGB) to 709 color space. I can't just use the "covert to profile" function to do this because it does not produce results that fall within the 16 to 235 range that 709 dictates. I've read that you can simply use the "Levels" adjustment and change the output levels to 16 to 235. While this would clearly compress the luminance to the correct range, I'm not entirely clear if the end result would be a proper conversion (i.e. if color and gamma, for example, would be technically correct.)
I noticed that converting the profile to "HDTV (Rec. 709)" does alter the image, so I'm wondering what the result would be if I did both this AND used the levels control to compress the output range to 16 to 235.
Thanks for any feedback on this.

(1)
http://en.wikipedia.org/wiki/Rec._709
(2)
http://en.wikipedia.org/wiki/Rec._601
The transfer functions for Rec.709 (1) refer to the range [0..1] or for 8 bits per pixel [0...255].
It seems that the clipping, black=16 and white=235 has to happen after the application of the
transfer function. If this should be true, then we don't have a level compression but a level
clipping at both ends, as already for Rec.601 (2), like here:
The ICC-Profile HDTV(Rec.709) in Photoshop contains the primaries and the white point
(both like that in sRGB) and the transfer functions for [0..1], coded by a LUT with high resolution,
as found by Profile Inspector. There is no clipping.
By the way, that`s the internal profile name, I don't know the file name of the profile.
Softproofing, source in sRGB, target HDTV(Rec.709), without clipping:
With numbers not preserved: no change of the appearance, as expected.
With numbers preserved: shows the effect of different effective gammas.
Your questions are very clear and I'm not sure whether my comments help. The information
in the internet is not convincing.
Best regards --Gernot Hoffmann

VideoSecu Video Converter with Current Model MacBook Pro?

I got this converter that I want to use to connect my current model 15" i5 MacBook Pro to my TV:
http://www.amazon.com/VideoSecu-Presentation-Converter-Laptop-1L7/dp/B000X3FAJU/ ref=sr150?ie=UTF8&s=electronics&qid=1227593643&sr=1-50
I have a Mini Displayport to VGA adapter. I have that plugged into the converter. The converter is USB powered. I am using a standard RCA video cable to connect to the video input of the TV. Once connected, I should be able to use my display preference panel, click "detect displays", and I should be up and running.
I have flipped the jumpers on this thing to every possible configuration and I can't, for the life of me get the video to display on my TV. Can anyone tell me what I'm missing, here?
I should be a simple "plug and play" thing, but I'm getting nothing but frustrated. Can someone help?
Thanks.

Problem solved.
My MacBook wasn't detecting the TV when I plugged the adapter and the converter into it. However, if the devices were plugged in and I restarted my computer, THEN the second display would be detected on start-up, and I'd be up and running. This solved part of my problem but, as you can probably guess, I wasn't completely satisfied. It still made no sense that I should have to restart my computer every time I want to connect it to my TV.
I talked to, both, VideoSecu and Apple and, ultimately, the problem lie not with the converter, but with the Mini Displayport-to-VGA adapter I was using. I bought a 3rd party (Dynex) adapter instead of the Apple one as it cost less and there didn't appear to be any functional difference between the two. Evidently, I was wrong in this assumption. If I used an Apple adapter, my computer would, immediately, detect the connected display without the need for a restart.
I have returned the Dynex adapter.

Problem in converting a simulink model in LabVIEW 2010

hello,
I have developed a Simulink model in MATLAB which I want to convert into equivalent LabVIEW VI's. The simulink model is as attached. The problem here is:-
LabVIEW is not able to convert all the mechanical blocks named Ankle revolute joint, Body , joint actuator and joint sensor into equivalent LabVIEW VI.
Is it possible to convert those blocks into equivalent LabVIEW VI's?
PS:- I am using LabVIEW 2010.
Attachments:
AAFO.PNG ‏19 KB

Hi Susheel,
RFC module interface parameters (import, export , tables) can only refer to data dictionary types. Hence if you currently have one of the parameters referring to a type defined in your function group main include or in a type pool, you need to create a SE11 data dictionary structure/ table type for that and then change the data type reference.
Cheers,
Aditya

Converting CMYK color model vlaues (0-100) to liquid color volume using labview

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