On Oct 11, 2006, at 9:04 AM, Dixon, Tom wrote:
Has anyone on the list done any work using Structures for reading and storing image header information of JPEG and TIFF images?, (and possibly others)
REALbasic structures will not work for this... the data is of variable length and only a few tags are required as part of the JPEG and TIFF specs.
I am primarily interested in reading this information so that specific pertinent data can be restored if the image is resaved using any of the existing RB plugins and or modules available. I am particularly interested in the ICC profile data, if a profile is embedded, if the image is merely tagged or is missing any profile indication at all.
If I remember correctly, copying the color profile would be pretty easy at least in the JPEG file. A JPEG file is broken into segments, and one of those segments is the profile although it does not have to be the same segment for every file. Then you would just identify the color profile segment and rebuild (write) the JPEG file with the segments you want.
I am a little unsure as to how to begin this and if someone else has already done the work then I would not tackle it at all ...regardless whether I had to pay a license fee for it or not.
I had worked on a project which would edit JPEG tag information, but I only got about 20% into the project before being distracted by something shiny... uh, I mean something else. I would be happy to help where I can though.
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