The colorspace seems to be set to DeviceRGB everywhere that I can find. Anyone have tips for controlling the final colors more consistently?
The only thing I have found is PDF's support for embedding a transfer function in the PDF (Does PDFBox support this?). If I am understanding this correctly, embedding a transfer function would tailor the PDF to some specific output device (ie, a particular monitor). I don't have that kind of control over the viewing/printing environment for the PDFs being generated so that probably won't work for me. Thanks in advance for any help on this. Buzzy On Tue, Sep 10, 2013 at 3:27 PM, Buzzy Spain <[email protected]> wrote: > Thanks, Lachezar. I think something else is going on; the images may be > just the most obvious issue. My black (Color.BLACK) text is picking as RGB > 5,6,7 rather than 0,0,0. A filled rectangle is also showing a color shift. > > barColor=new Color(179,26,51); // <--- renders as 181,52,58 > contentStream.setNonStrokingColor(barColor); > contentStream.fillRect( graphLeft, tableRowY, graphSize * barPercent, > Table.BAR_HEIGHT); > > > On Tue, Sep 10, 2013 at 2:25 PM, Lachezar Dobrev <[email protected]>wrote: > >> Possibly the images get compressed as JPEG or similar. >> I've had problems with other PDF generators too, occasionally when >> adding a Bar Code to the PDF it gets severely distorted. As it turns >> out the encoder compressed the image using JPEG, which results in >> severe errors in the image. >> >> 2013/9/10 Buzzy Spain <[email protected]>: >> > Hi all, >> > >> > I am trying to understand why the images I am writing into a pdf end up >> > with different rgb values than the input images. >> > >> > As an example, for one image, if I open the png file in MS Paint and >> use >> > the color picker I get RGB of (179,26,51). After writing that same >> image >> > to a page's content stream, saving the document, and then opening it in >> > Adobe Acrobat, if I use a color picker tool the RGB value is (181, 52, >> 58). >> > Other images have significant shifts in other channels. >> > >> > Can anyone provide any tips on how to address this? >> > >> > Thanks, >> > Buzzy >> > >> > ps. Code for adding images to document is below: >> > >> > BufferedImage image = ImageIO.read(new File("colorLegend.png")); >> > PDJpeg xImage = new PDJpeg(document, image, quality); >> > //PDPixelMap xImage = new PDPixelMap(document, image); // <--- doesn't >> > seem to help >> > contentStream.drawXObject(xImage, x, y, width, height); >> > >
