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Converting CMYK to RGB

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jaya Posted: Mon, Apr 21 2008 1:52

Hi

  Does anyone know how a drawing in CMYK can  be converted to RGB ? At present i am selecting each element of the drawing and manually converting it.Tried the Visual Basic 'File Converter' option, but it doesn't work.

I hope there is a better way as i have many images to convert. A solution to this will be greatly appreciated.

 Thanks
 Jaya

 

Top 25 Contributor
Stockholm, SWEDEN (Europe) Illustrator & Artist
Male
CorelDRAWMaster

 Hi Jaya,

Being a illustrator myself, drawing a lot, could you please let us know why your drawings take long time to convert to RGB?
You wrote this question in CorelDRAWX3. Does this mean you have a bitmap scanned image or anything else in your CorelDRAW document?
If your line drawing is a bitmap, jpg, tiff and so on?

For example when I have a linedrawing, sketch without several colours, that I like to convert from example RGB to CMYK or Grayscale and so on, I useally do like this.

If you have your image inside CorelDRAW then select your image and press the button called "Edit Bitmap" which will open Corel Photo-Paint. Or you open Corel Photo-Paint from start and from there open the image, drawing.

When you have your image in Photo-Paint, go to  the Menu bar and via  IMAGE >  Convert to RGB or whatever colour you like.
And then SAVE.

jaya replied on Mon, Apr 21 2008 4:37

Hi Stefan

    Thanks very much for your reply.

I guess i should have been more elaborate. I have this set of images which are vector drawings in the .cdr format. There are no bitmap images in them. Actually i have to convert them into the .svg format. However since they have CMYK color, it shows up as an error while saving to SVG. It says that there are 'Non RGB' colors in the file.Therefore i have been converting each color in each drawing manually into RGB. So, was looking for a way in which i can convert the whole image to RGB as then i can save them as .svg without errors. Cannot 'select all' and save as there are line drawings in the image which get filled up. Also, there are different colors in a single drawing.

Do let me know if  you have a solution to this.

Regards
Jaya

Top 25 Contributor
Pune, India
Male
CorelDRAWMaster

 Hi Jaya

I suggest you use the find & replace in CorelDRAW to change the color model from CMYK to RGB. You will have to search for CMYK color model& replace with RGB Color Model. Please note that the colors may change a bit because of color gamut.

Anand 

jaya replied on Mon, Apr 21 2008 23:27

Hi Anand

   Thanks for making life easier for me :)  This works well and i can now do the conversion fast.

Regards
Jaya

Top 25 Contributor
Pune, India
Male
CorelDRAWMaster

 My pleasure Jaya.

Hi, I saw how similar this thread is to my problem and I thought I would post to the end of it.

I am submitting a manuscript to a scientific journal and I made all of the figures (as always) in CorelDraw. Each figure is either vector or vector+bitmap and I made them all with CMYK. The journal only accepts RGB, so I used the 'find and replace' to replace all CMYK with RGB for both fills and outlines. However, when I export this to eps, the journal's software still reports that I have CMYK in the eps. How could that be? The 'find and replace' reports that it cannot find any CMYK objects and the eps is set to send bitmaps as RGB.

I would like to use eps rather than tif for the journal (those are my choices) because these tif files are enormous (200-300 megabytes) and I have to upload them to the journal through the journal's website. I am using CorelDraw X4 on Windows XP.

Thanks,

Eric

Top 50 Contributor
St. Albert Alberta Canada
Male

What did you do with the EPS export dialogue regarding bitmaps? The default is to export all bitmaps as CMYK.

EricB wrote:

<snip>

I am submitting a manuscript to a scientific journal and I made all of the figures (as always) in CorelDraw. Each figure is either vector or vector+bitmap and I made them all with CMYK. The journal only accepts RGB, so I used the 'find and replace' to replace all CMYK with RGB for both fills and outlines. However, when I export this to eps, the journal's software still reports that I have CMYK in the eps. How could that be? The 'find and replace' reports that it cannot find any CMYK objects and the eps is set to send bitmaps as RGB.

EDIT -- OOPS sorry -- I missed the last four words of your post where you said you set RGB for the bit maps in the EPS dialogue.

This whole CMYK/RGB  buisness has turned upside down in the last couple of years. Remember the good old days when it was unconditional that one had to send CMYK; now there are many instances like you encountered of unconditional requirement for RGB. IIt would be so nice if the w)orld would come together again on this--or at least inform the person which is required BEFORE doing the job!


Paul McGee St. Albert, Alberta, Canada

Hi,

Thanks for the reply- I have EPS export dialogue set to export as RGB. I should also note that there are four figures, two of which have no bitmaps, yet they still fail.

-Eric

Top 10 Contributor
Calgary, Alberta, Canada
Male
TAG - MacroMonster.com

CorelDRAW X4 Sp1 or lower forces RGB vector shapes to CMYK when creating EPS files. Don't shoot me! I am only the messenger... Smile

Don't believe? Open attached. See RGB colored shapes. Export to EPS. Then open eps back into in Draw. It is EZ test....

try publishing file as PDF using RGB archive preset. Then open in draw, RGB values preserved that way.

 

EricB:
...so I used the 'find and replace' to replace all CMYK with RGB for both fills and outlines. However, when I export this to eps, the journal's software still reports that I have CMYK in the eps.

 

Hi,

Thanks for the answer- ugh what a long time I spent uploading tifs!

Top 10 Contributor
Calgary, Alberta, Canada
Male
TAG - MacroMonster.com

Consider saving from CorelDraw as RGB PDF

Convert that PDF file to EPS using Acrobat Pro. RGB can be preserved in EPS that way.

 

EricB:

Hi,

Thanks for the answer- ugh what a long time I spent uploading tifs!

 

 

EricB replied on Wed, Dec 10 2008 17:38

I am flagging your post so that next time I have to go through this, I will have a way out.

Thanks so much for helping,

Eric

Eppers replied on Sun, Mar 13 2011 13:32

Hi there, 

i have similar problem. I import some jpg files and i want to convert them from rgb to cmyk mode. I try to use the find and replace option but it doesn't work. I choose find rgb models and change them to cmyk but it can't find any (but there are jpg bitmaps in RGB).  

I'm using X3 corel. 

Any help?

Thanks

EricB replied on Sun, Mar 13 2011 16:37

Are you making an encapsulated post-script file from Corel Draw, or is Corel Draw just not changing the properties of your jpeg?

If the former, you may be stuck in the same boat as me- I ended up having to use the Adobe pdf workaround mentioned by another poster, if the latter, I think you have to go in to a photo editor like Corel PhotoPaint, open each RGB jpeg, convert it to CMYK, save it, then go back to Corel Draw and re-insert the converted jpeg- I don't think CorelDraw will directly convert a jpeg's color scheme for you.

Hope that helps,

-E

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