> I'm only guessing but it's unlikely that the pixels are changed. The ICC
> profile is for transforming the pixels for the output depending on the
> device. The original pixels stay the same.
If so, it will be quite easy to add ICC Profile into iText. Let's
do one for JPEG first. TIFF is bit complex. I will start work on that
after I collect enough feedback from mailinglist.
>
> Adding an ICC profile to an image is in my to-do list. Recently there was
> the case of a user with a TIFF with a CMYK image that would benefit from it
> (the TIFF also included the ICC profile).
>
> Best Regards,
> Paulo Soares
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]]
> > Sent: Wednesday, September 11, 2002 1:44
> > To: [EMAIL PROTECTED]
> > Subject: [iText-questions] ICC Profile
> >
> > Good morning folks:
> >
> > This thought actually came up when I was using Enfocus PitStop plugin for
> > Acrobat. Enfocus had some nice feature which you can select an image
> > object and change the color space to some ICC Profile. I had a look at the
> > actual PDF data. It seems that PitStop simply add the colorspace into page
> > resources dictionary, ie. /ColorSpace <</CS0 [/ICCBased 4 0 R]>> and then
> > changed the image xobject colorspace dictionary entry to point to the ICC
> > Profile object in PDF document.
> >
> > What I am not quite sure is whether PitStop do a reencoding of the image
> > data. I mean actually convert the image pixel colors according to the
> > Profile.
> >
> > Assuming PitStop leaves the converting process to Acrobat Viewer.
> >
> > This reminds me how iText can handle ICC Profile on Image objects.
> >
> > Image im = new Image(String fn);
> > im.applyICC(String ICCfilename);
> >
> > In the iText PDF engine, all we have to do is create a PdfICCBased object
> > which extends the PdfStream, insert that to page resource dictionary,
> > change the image colorspace dictionary to indirect reference to
> > PdfICCBased object.
> >
> > It is pretty easy to find out how many components in ICC
> > Profile: java.awt.color.ICC_Profile(String
> > filename).getNumComponents(). That will be enough for PdfICCBased stream
> > object.
> >
> > Of course these are all based on the assumption that actual image pixels
> > not changed.
> >
> > Anyone can give me some idea how PitStop apply the ICC Profile to image
> > xobject in Acrobat? Paulo, Leaonard?
> >
> >
> > --
> > With regards
> >
> > Phillip Pan
> > -----------
> >
> >
> >
> > -------------------------------------------------------
> > In remembrance
> > www.osdn.com/911/
> > _______________________________________________
> > iText-questions mailing list
> > [EMAIL PROTECTED]
> > https://lists.sourceforge.net/lists/listinfo/itext-questions
>
--
With regards
Phillip Pan
-----------
-------------------------------------------------------
In remembrance
www.osdn.com/911/
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