Diane sent me some files off-list, and the discrepancy between the JPEG size and the PDF size is now easily explained:
The JPEG images are CMYK JPEGs with an embedded ICC color profile. A 678KB JPEG file contains 480KB worth of color profile data which is duplicated in the PDF. The JPEG is simply embedded as is in the PDF plus the color profile has to be added separately. The color profile is flate compressed and encoded using ASCII85 while the JPEG image is embedded as is with no additional encoding using FOP's default settings. I can't tell off-hand if the color profile could be removed from the embedded JPEG file without damaging anything. At any rate there's currently no way to bring down the PDF size other than not using a color profile when saving the JPEG image. On 21.03.2007 09:19:10 Jeremias Maerki wrote: > > On 20.03.2007 11:35:38 Diane wrote: > > Jeremias Maerki <dev <at> jeremias-maerki.ch> writes: > > > > > > > > > > It depends on your settings. If 0.20.5 is run at default settings, I > > > would expect the PDF to be just under 2MB. A short test of my own > > > confirms that (one JPEG of 929'406 bytes results in a PDF of 930'622 > > > bytes). > > > Maybe not all your images are really JPEGs or maybe you configured an > > > ASCII85 filter for JPEG images or FOP, for some reason, decodes your > > > JPEG images which can make them bigger. Without seeing the resulting PDF > > > I cannot say what has happened on your side. > > > > > > > I'm running with a specific user config file with our clients proprietary > > fonts in, but I've just tried running through a stripped down file with one > > of > > their images and one from my phone camera. The phone camera image produces > > a > > PDF much closer in size. > > The images are being produced by a third party from within Photoshop - > > would > > this be where you would save in any ASCII filters? > > It really depends exactly on your configuration file and the images. If > you want you can send me those off-list and I'll check what the problem > is. I can only explain the increase in file size if those Photoshop > images are not real JPEG images or if somethin in the config file is set > accordingly. > > Jeremias Maerki Jeremias Maerki --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
