On 06.10.2007 01:11:09 kennardconsulting wrote: > > Jeremias, > > Thank you for your reply! What you suggest definitely sounds on the right > track! > > So my scenario is: I put colours/JPEGs in my XSL-FO, then in Adobe Reader > 8.1 they appear very washed out. Even without bringing in another tool (to > accurately measure the colour) I can see with my eyes they are different to > how they appear in, say, a Web browser. > > Here's a screenshot of what I see. It shows the same image in my browser and > in Adobe Reader after FOP: > > http://www.kennardconsulting.com/kc/media/washout.png > > So are you saying Adobe Reader 8.1 may be using uncalibrated colors? Is > there a way I can tell it to use calibrated colours?
No, actually Reader is correctly using calibrated colors and that's why the colors appear differently. The problem with calibrated color is that the whole device chain needs to be calibrated, too, to give an accurate representation of the color. Change some brightness or contrast setting on your monitor and you already have different colors. I'm really not a color expert, yet, but I strongly believe that what is happening on your side is completely correct (technically). I've also noticed the different color appearances in a number of cases, but so far nobody has been able to prove to me that we're currently doing something wrong. And I have been talking to a number of professionals in that area. > Or is there another tool other than Adobe Reader 8.1 I could try to view my > PDFs? If Adobe didn't get the color handling right, who would? In earlier versions I think it was possible to disable color management but that's not possible in 8.x anymore. You could use another PDF viewer which has no color management. There's a possibility that it would incorrectly display the colors like you expect them. :-) Another thing could be to disable the whole sRGB chain in FOP using a config setting so it would mimic the (wrong) behaviour of FOP 0.20.5. But that would involve some Java hacking. BTW, does your JPEG image contain an ICC color profile? If not, then you cannot be sure how the image will be handled by any displaying or printing application because all its colors are in the uncalibrated color space. Browsers don't care about color fidelity. But PDF tool chains have much higher requirements. Even if the JPEG had a color profile, the browser might still display the image without consulting the color profile, thus showing it wrongly. It's all very complicated.... Jeremias Maerki --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
