2005.08.04 15:08 "Re: [Tiff] tiff unknown field of tag", by Frank Warmerdam

On 8/4/05, Steven Woody <narkewoody@gmail.com> wrote:

i got back some scaned tiff's from a photo lab. openning with xv or gimp

just got a warning message: unkown field of tag 34665(0x8769). i want to know what's wrong with thoese files and how do a work around.

Steve,

Note, this is a warning not an error. It doesn't mean there is anything wrong with the file, just that there is stuff in the file that isn't recognised by libtiff as baseline tags.

below is the output of tiffinfo on a tiff file in question,

|...
`----

Well, it looks like you have trimmed the output at the interesting point. In particular, modern tiffinfo's attempt to report some basic information about unrecognised tags at the end of known tag processing.

for the tiffinfo output, i still has two questions desiring kind help from you.

1. what means "ICC Profile: <present>"? and what is ICC?

It is information related to color control. Do you really want to know more?

2. i noticed this file is uncompressed. so what's the benefit the lab save
tiff rather than a bmp? result in

Because a variety of extra metadata can be saved in it. Why would saving it in BMP be better than saving it in TIFF?

Best regards,
--

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