CMYK to RGB

Hi I have verious images that are in CMYK and need to be
converted to RGB. Does anyone know how to do this within
fireworks?

Linda,
We like to build our ads in a Vector program as I understand
that small text
prints more crisply when it is vector text... as opposed to
bitmap text.
As I understand it Elements is a bitmap program like
Photoshop.
Normally we edit our photo's in the bitmap edtiror then paste
them into a
vector program like Illustrator to add text, fills, borders,
etc... then PDF
before sending to the print shop.
Am I wrong about Elements?
Is there an Illustrator Lite that we could use with Photoshop
Elements?
thanks for any help.
"Linda Rathgeber **Adobe Community Expert**"
<[email protected]> wrote in
message news:eff00k$btj$[email protected]..
> tmb wrote:
>
>> Can't afford Photoshop & Illustrator for all the
sales force so were
>> hoping to use Fireorks but maybe the CMYK is a deal
killer... true?
>
> How about Photoshop elements?
>
>
http://www.adobe.com/products/photoshopelwin/
>
> --
> Linda Rathgeber [PVII] **Adobe Community
Expert-Fireworks**
>
>
http://www.projectseven.com
> Fireworks Newsgroup:
news://forums.projectseven.com/fireworks/
> CSS Newsgroup: news://forums.projectseven.com/css/
> Design Aid Kits:
http://www.webdevbiz.com/pwf/index.cfm
>

Similar Messages

I can convert almost things multiple times at the same time including CMYK to RGB (or sRGB), but not RGB to CMYK and not brighten/contrast. How?

I can convert almost things multiple times at the same time including CMYK to RGB (or sRGB), but not RGB to CMYK and not brighten/contrast. How?

If you want a relevant answer you may have to elaborate on what you actually mean. Posting screenshots might help, too.
In any case multiple conversions of an image are not advisable in general.

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

Convert cmyk to rgb in acrobat 7

Good morning,
I have a question about converting color spaces using Acrobat 7 Professional and Pitstop Pro.
I have some CMYK PDFs used for magazine printing that I need to convert to a 144 DPI RGB version for a digital edition.
I know most folks are concerned with RGB to CMYK but I need to do it in reverse...
If I do a Convert Color in Acrobat CMYK to RGB it looks a lot better than if I do it using an Action List command to Convert to RGB in Pitstop.
The Pitstop ones look almost posterized, way darker with significant color shifts
I would have thought Pitstop would use the Acrobat color engine to do the transformation to RGB but it seeems it knid of does it's own thing.
I do have sRGB selected in my Color Management Prefs in Acrobat.
It would be nice to make this RGB second version PDF with Pitstop and Distiller on our server so it runs more automated, less manual intervention...
thanks for any advice you have,
Pat

I think I stumbled across the solution... there are separate Color Management Preference controls for Pitstop.
I selected sRGB instead of the Enfocus Default RGB.

Coverting PMS Colors to CMYK or RGB

HI there, I have been given some PSM colors to use for a
website but cant find how to convert them to CMYK or RGB. Does
anyone know anything about PMS colors and how I would go about
converting?
1. Example: PMS 8520 Metallic Light Brown
Cheers
Mally

quote:
Originally posted by:
MalRom
HI there, I have been given some PSM colors to use for a
website but cant find how to convert them to CMYK or RGB. Does
anyone know anything about PMS colors and how I would go about
converting?
1. Example: PMS 8520 Metallic Light Brown
Cheers
Mally
Years ago, Pantone made a product called ColorWeb Pro that
had software and also a fan of ink samples and Pantone's
recommendations for CMYK and RGB (Web) values that would be the
best representation for each ink. For the Web, they'd researched
the ink colors and tried to account for variations in graphics
card, monitor, and printer hardware. Because of that variation,
there's really no hard and fast conversion you can use. (Plus, the
RGB colors that are best for the Web won't be the same as the CMYK
colors that are best for print.)
Pantone has a number of current products for color matching.
You might be better off contacting them and getting advice on what
product would work best for you.
Pantone Web site
For a metallic color, you might want to use a subtle gradient
to simulate a reflective effect, though.
Good luck!

Covert DocumentColorSpace CMYK to RGB?

All,
Is there a way to change a document's colorspace between CMYK and RGB?
I know the Document.documentColorSpace says 'read-only', but according to the documentation, it seems like the Application.open() method has the ability to open the document with a different colorspace, but doesn't seem to work... from the documentation:
var fileRef = filePath;
if (fileRef != null) {
     var optRef = new OpenOptions();
     optRef.updateLegacyText = true;
     var docRef = open(fileRef, DocumentColorSpace.RGB, optRef);

The way to change it:
You cannot change it when the document is open, but this should work:
- Open the document with the DocumentColorSpace.CMYK
- Create a script that opens a new blank document with a Document preset of DocumentColorSpace.RGB
- Create a copy function that copy's the data from one document to the other.
- Create a function that closes the original document but stores it's name and path in a variable.
- Create a save function that saves the new document under the same name and location, or if you like a different location.
Cheers
Daniel

CMYK to RGB conversion in photoshop

Hi,
I have synchronized my colour settings in bridge to be the same across all my Adobe software, it's currently on Europe Prepress 3 because that's what I've been taught is correct in Australia. I have a colour swatch of C:0 M:90 Y:15 K:0 and when I change the colour slider to RGB in photoshop is gives me the values: R:200 G:53 B:122 (not sure if this is a good way of converting the colours?)
My initial swatch:
When I key this exact RGB value online it gives me a much darker swatch:
So using multiple cmyk to rgb online converters (to compare) I key in my initial cmyk values and the rgb swatch it converts to is so much brighter and gives me the values R: 255 G:25 B:217
I know I'm doing something wrong. I hope someone can help me with this!
Thanks in advance!

This is about 1) different color spaces which will have different numbers for the same color, and 2) gamut limitations going from one space to another (some color spaces are bigger than others and can contain more saturated colors).
"Europe Prepress 3" is just a preset. It sets Adobe RGB as working RGB, and FOGRA39 as working CMYK. When you go online, however, you'll most likely get numbers corresponding to sRGB and US Web Coated (SWOP) v2, because these are the Photoshop defaults (but have no particular significance beyond that). IOW there are no such things as "RGB" and "CMYK" - only specific RGB color spaces and specific CMYK color spaces.
In different color spaces, such as sRGB vs. Adobe RGB, the same color is represented by different values. That's why you have to convert from one to the other.

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.

How do you Convert CMYK to RGB

I have a project that I need to convert all of the AI files from CMYK to RGB. This use to be very simple back-in-the-day by just choosing Filter > Convert to RGB. I know about Document Color Mode and Convert to RGB.
When I select all of the objects and choose RGB under Document Color Mode, I still see CMYK plates when I preflight the PDF. Depending on what the Document Color Mode is set on, I either have Convert to RGB grayed out or always available. The resulting file show up as CMYK in both Quark and ID along with CMYK plates when I preflight the PDF.
What am I missing here?
AI CC 2014

Can you be more specific? Which option are you interested in?

Why don't Adobe Color CC and InDesign CC 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?
Thanks very much

It's working for me (Web, PS, AE, ID, FL; not available in the Color Themes panel in Ai). Please click the triangle next to the color space to expand and view more data.

CMYK and RGB in one document

I do not understand why the RGB and CMYK dokument still needs to be separate?
So at the end decide how and in what format should I save my output result.
We have the era of CMS, and Illustrator has not changed thinking!???
Now every time If I create a style guide for different media I need to save separate documents, and make changes the tem, and when I want to change jet mess sync.
Please explain if I think impractically.
Eg:
The same applies to the choice of mixing color for the object.
If select object the color mixing of RGB, HSL, WEB etc ... let the mixture is automatically called when re-select the object.
If I wanted to replace the selected objects to a particular model of CMYK, RGB etc then I can select it and choose options from a palette of CMYK, RGB etc, will automatically convert on a mixing model.
Just add an option in isolates by RGB, CMYK etc. in my document if I necessarily want to isolate the CMYK or RGB object in my composition.
As it is well make in the preview window in "Recolor " function under the magnifying glass icon.
(sorry for poor English)

I support your point of view, Illustrator development team need to work to update Illustrator's Color Management System, that's why color profiles are.
We need to create color in Lab, RGB or CMYK in the same document.

CMYK and RGB with a laser printer

I'm using ID CS2 and a Konica Minolta bizhub C353P printer.
I was supplied with a pdf artwork file by a customer. I believe it's CMYK, but am not sure, as Document Properties in Acrobat doesn't give that information. Firstly, is there a simple way of checking whether a pdf file is CMYK or RGB?
I placed the pdf artwork into ID and printed the indd file, but found that the colours were not quite correct. So I imported the original pdf file into Photoshop and changed it from CMYK to RGB. I then saved it as a tiff file and placed it back in the indd file. The colours now printed correctly. Next question - is there a better way of converting a pdf file from CMYK to RGB and vice versa?
When I printed the indd file the print driver would only allow me to print in Composite RGB - Composite CMYK and all the other options were greyed out. However, if I printed to Acrobat, Composite CMYK and the other options were available. Now as I'm printing to a CMYK laser printer, I would have thought it better to print in Composite CMYK. Am I correct?
And can anyone suggest why the printer driver won't allow it?

Edward
here are some useful operations by Professional Acrobat 7:
How to analyze image color spaces in a PDF:
Tools > Print Production > Preflight > Digital Press (Color) >
Execute > Overview > Images.
How to convert images in a PDF (here DeviceCMYK to sRGB):
Tools > Print Production > Convert Colors > Device CMYK:
Convert > Profile > sRGB > Embed as Output Profile > Execute
IMO there is no choice for an input CMYK profile.
I don't know whether embedded profiles (not to be expected
for CMYK) or a global Output Intent are honoured.
How to edit images without loading the whole PDF in
Photoshop (which would rasterize everything):
Tools > Advanced Editing > TouchUp Object Tool > Right Mouse
Click on Image > Edit Image > (Opens Image in PhS) >
Edit here > Save > Close (Shows PDF with modified Image) >
Save As by new name.
Best regards --Gernot Hoffmann

CMYK and RGB Issues between PS and AI

I also posted this in the AI forum, not sure if people look at both. If this is taboo, sorry.
Greetings
I am using AI and PS CS5.
I have an eps in AI that is set for RGB. The colors are how I want them.
When I open the same eps in PS, PS thinks the file is CMYK. Whether I open the file as CMYK and convert to RGB or open at RGB, the colors shift. If I leave the file as CMYK, the colors are shifted.
I can confirm that when I convert the file in AI from RGB to CMYK, I can see the color shift. If I leave the file as RGB in AI, it looks how I want.
I cannot get the file to show in PS as the same color as what I see in AI.
I have confirmed that both AI and PS have color settings set to NA GP2.
I am hoping this is something simple and someone can help me out.
I hope this helps explain:
http://img170.imagevenue.com/img.php?image=576032284_colorshift_122_52 4lo.jpg
Basically, the file with AI in RGB mode looks how I want. The file with AI in CMYK mode looks different.
In PS, both RGB and CMYK color mode are the same as CMYK in AI.
I am not sure why PS does not show the RGB colors like AI does.
PS CS5 and AI CS5 are synched:
http://img157.imagevenue.com/img.php?image=586919644_colorsync_122_199 lo.jpg
I think this is a PS issue? Thanks in advance.

File -> Document Color Mode -> RGB is the default when the EPS is opened in AI. This displays what I want.
When the EPS is opened in PS, the default is CMYK. Whether I change it to RGB there or import as CMYK and then change the mode to RGB, the colors do not change. In PS, they look like what I see when in AI when the EPS is set to CMYK, if do this: File -> Document Color Mode -> CMYK.
So in PS, whether I have mode set to RGB or CMYK, it looks the same.
And in AI, based on the setting Document Color Mode, I can see the difference.
How do I get what I see in AI in RGB mode to appear in the same EPS in PS?
Thanks

Change swatches from CMYK to RGB

Okay so I've just realised that my documents are CMYK and have changed the settings to RGB (File > Document color mode > RGB and from the colour fly out menu) although I notice that when I hover my mouse over the colors in the swatches panel that it shows me the CMYK values.
Could someone please assist me with this as I'm not sure why this is happening.
Thanks in advance

to change color definitions--from the 'color' menu select the flyout menu in the upper right corner (indicated in attached pics) and change from cmyk to rgb

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.

PDF reduce file size filters and CMYK to RGB conversion

This doesn't seem to be on-topic to this forum, but I'm hoping someone here has the expertise to answer my question. We have some scripts which take a series of press-quality pdfs and use the "reduce file size" filter to prepare them for viewing on the web. We run these scripts on a 10.4 machine, and the filter works very well, reliably reducing file sizes of all sorts of pages.
When we tried to upgrade the machine, we discovered that the quartz filtering has changed in 10.5 and 10.6. While it's usually an improvement, getting maybe 5-10% better compression ratios, it has become unreliable in that about 5% of my files fail spectacularly -- they blow up to 3, 4, 5, 6 times the original size.
The other thing that happens is that the 10.5/10.6 filters munge the colors up. I found the solution to this -- in the ColorSynchUtility, make a duplicate of the Reduce File Size filter, and add a Color Management Component called Convert To Profile. This allows me to set a filter that converts the CMYK content to RGB. The problem is that there are about 40 choices of profiles, and it's not at all clear what I should use. Many of them have printer manufacturer's names in them, some say "Adobe", others have cryptic codes (probably referring to various RFCs and schemes). I've tried a couple of the ones that don't look like they are for printers, basically chosen at random. They all produce files of slightly different sizes for the reductions that go well, but on the files that blow up, some filters are better than others. (For example, I have a 5MB page which reduces to 1.4MB with the 10.4 filter, but blows up to 27MB with the "sRGB IE61966-2.1" profile, but only 12MB with the "Adobe RGB" profile.)
So I have 2 questions:
1) Is there any way to configure a 10.5/10.6 custom profile so that it behaves as reliably as the 10.4 "stock" PDF Reduce File Size works? It doesn't have to be the most wonderful compression algorithm out there, just so that it never or rarely has a file blow up in size.
2) For converting press documents to pdfs that are going to go on the web, what is a good "Convert to profile" to use of the 40-some choices on the pull-down menu?

Cathy,
You have posted your question in a forum dedicated to the Final Cut Studio application Color. It is a very specialized program to grade (adjust) the color in video/film images. We know nothing regarding PDFs.
Have you tried posting this on an Adobe support site?
Good luck,
x

CMYK to RGB

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