Re: CMYK from Batik

[Patrick Egan]

Hi Thomas, Essentially what I am trying to do is to create some output from Batik that can be used to create an offset lithography printing plate. The image is really simple just black and red text with an embedded black and white png. Using PrintTranscoder I print to a PDF printer driver. These pdfs are always in the rgb colour space. When loaded into the imagesetting software RGB PDFs do not separate cleanly into CMYK process colours. RGB to CMYK conversion software may be the solution. I will look into what you said in your reply but my gut reaction is that CMYK JPEG is not the way to go. Thanks for the fast reponse. Patrick [EMAIL PROTECTED] wrote: Hi all, Jeremias Maerki <[EMAIL PROTECTED]> wrote on 01/24/2006 05:32:44 AM: AFAIK, none of the bitmap transcoders support the creation of a CMYK bitmap at the moment. This is correct, however if you were to check out the code in the "How to load an SVG resource into a java.awt.Image" thread. You would have essentially everything you need to construct get a CMYK BufferedImage from Batik (you will have to use the 'ColorModel' constructor for the BufferedImage, use the 'createCompatibleWritableRaster' to get an appropriate raster). The one word of caution I will give is that my experience with Java2D is that problems start to crop up once you get "off the beaten path" and rendering to a CMYK image is almost certainly off the beat path. Also I'm a little curious why a CMYK JPEG is any better than an RGB (well YCbCr) unless you have support for specifying CMYK colors. Which the above will _not_ give you. On 23.01.2006 17:03:39 Patrick Egan wrote: Thanks for your answer Jeremias, Can anyone tell me how to create a CMYK JPEG with the JPEGTranscoder. I believe that this involves the use of <color-profile> tag with a reference to an .icm file, but an example of both java and suitable svg source would help greatly. Thanks, Patrick Jeremias Maerki wrote: FRF = Frequently requested feature :-) No, the PDF output currently doesn't support CMYK. Only for CMYK JPEGs with an ICC profile the CMYK information can be preserved, but that's not what you're asking for. Furthermore, SVG is not really oriented towards CMYK. I can't talk for Batik, only for FOP (Batik uses FOP code for PDF output), but we currently can't specify colors with an ICC profile which is the only possible route to work with CMYK colors. And it may even be non-standard as far as I know. Given the amount of feature requests in the past I would have thought that someone finally sits down and starts implementing support for CMYK. But I guess we'll have to wait a little longer for that. On 09.01.2006 18:18:22 Patrick Egan wrote: Hello, I may be asking for the moon on a stick but is there any way to get CMYK colour output, preferably in pdf format from Batik ? I can get pdf output using PrintTranscoder and pdf printer driver (eg.PDF reDirect) but the pdfs are always in RGB and require a further conversion to CMYK before they can be used to make printing plates. Thanks, Patrick Jeremias Maerki --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- SML GRESHAM   Patrick Egan IT             SML Gresham Unit 2 RiverSide Industrial Estate Market Harborough Leicestershire LE16 7PT [EMAIL PROTECTED] [EMAIL PROTECTED] tel: fax: +44 (0)1858 439430 +44 (0)1858 439435     Important - This e-mail and the information that it contains may be confidential, legally privileged and protected by law. Access by the intended recipient only is authorised. Any liability (in negligence or otherwise) arising from any third party acting, or refraining from acting, on any information contained in this e-mail is hereby excluded. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Copyright in this e-mail and attachments created by us belongs to the author and also asserts the right to be identified as such and object to any misuse. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]