John Francis wrote: >Technically, EXIF refers to the whole of the image file format that >we usually just call a JPEG file, because the actual image stream >is typically stored using the JPEG File Interchange Format. >(For real geeks: EXIF is, itself, an extension of the TIFF format). > >When applications such as Photoshop talk about stripping EXIF data >from a file they're really talking about stripping particular sorts >of EXIF metadata (typically information on camera model, the date on >which the image was captured, shutter speed, aperture, ISO, location, >etc., etc.); the resulting file still conforms to the EXIF format, >and may well still include some other EXIF metatata.
That's a good point: I was always under the impression that the color space tag in EXIF was just that - a tag, rather than the full embedded profile data. I've long wondered why simply tagging files with their ICC profile (rather than embedding the profile) never seems to have caught on. (it's certainly possible, according to the Fraser/Murphy/Bunting Real World Color Management book.) I'm guessing that in most cases until recently the extra 3k or so of file size wasn't enough of an issue because most files for which a profile is important were for print rather than web display. -- Mark Roberts - Photography & Multimedia www.robertstech.com -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
