2005.08.04 23:42 "[Tiff] RE: NEWBIE HELP NEEDED: Efficiently changing orientation tags in multipage tiff files", by Bradley Feldman

2005.08.04 15:26 "Re: [Tiff] tiff unknown field of tag", by Steven Woody

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.


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.

but the applications was keeping pop warning message to borning me :) its not so good, isn't it?

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.

thank you. now i attache the full oupput,

| TIFFReadDirectory: Warning, /home/portfolio/scan/zmm/16-4.tif: unknown field with tag 34665 (0x8769) encountered.
| TIFF Directory at offset 0x8
|   Subfile Type: (0 = 0x0)
|   Image Width: 1580 Image Length: 2338
|   Resolution: 1800, 1800 pixels/inch
|   Bits/Sample: 8
|   Compression Scheme: None
|   Photometric Interpretation: RGB color
|   Date & Time: "2005:08:04 19:54:07"
|   Samples/Pixel: 3
|   Rows/Strip: 2338
|   Planar Configuration: single image plane
|   ICC Profile: <present>, 668992 bytes
|   Photoshop Data: <present>, 5624 bytes
|   XMLPacket (XMP Metadata):

| <?xpacket begin='锘� id='W5M0MpCehiHzreSzNTczkc9d'?>
| <x:xmpmeta xmlns:x='adobe:ns:meta/' x:xmptk='XMP toolkit 3.0-28, framework 1.6'>
| <rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns:iX='http://ns.adobe.com/iX/1.0/'>

|  <rdf:Description rdf:about='uuid:9b815c1e-04d4-11da-ba74-cb6dad60b069'
|   xmlns:pdf='http://ns.adobe.com/pdf/1.3/'>
|  </rdf:Description>

|  <rdf:Description rdf:about='uuid:9b815c1e-04d4-11da-ba74-cb6dad60b069'
|   xmlns:photoshop='http://ns.adobe.com/photoshop/1.0/'>
|   <photoshop:History></photoshop:History>
|  </rdf:Description>

|  <rdf:Description rdf:about='uuid:9b815c1e-04d4-11da-ba74-cb6dad60b069'
|   xmlns:tiff='http://ns.adobe.com/tiff/1.0/'>
|   <tiff:XResolution>18000000/10000</tiff:XResolution>
|   <tiff:YResolution>18000000/10000</tiff:YResolution>
|   <tiff:ResolutionUnit>2</tiff:ResolutionUnit>
|  </rdf:Description>

|  <rdf:Description rdf:about='uuid:9b815c1e-04d4-11da-ba74-cb6dad60b069'
|   xmlns:xap='http://ns.adobe.com/xap/1.0/'>
|   <xap:CreateDate>2005-08-04T19:54:07+08:00</xap:CreateDate>
|   <xap:ModifyDate>2005-08-04T19:54:07+08:00</xap:ModifyDate>
|   <xap:MetadataDate>2005-08-04T19:54:07+08:00</xap:MetadataDate>
|   <xap:CreatorTool>Adobe Photoshop CS Windows</xap:CreatorTool>
|  </rdf:Description>

|  <rdf:Description rdf:about='uuid:9b815c1e-04d4-11da-ba74-cb6dad60b069'
|   xmlns:xapMM='http://ns.adobe.com/xap/1.0/mm/'>
|   <xapMM:DocumentID>adobe:docid:photoshop:9b815c1d-04d4-11da-ba74-cb6dad60b069</xapMM:DocumentID>
|  </rdf:Description>

|  <rdf:Description rdf:about='uuid:9b815c1e-04d4-11da-ba74-cb6dad60b069'
|   xmlns:dc='http://purl.org/dc/elements/1.1/'>
|   <dc:format>image/tiff</dc:format>
|  </rdf:Description>

| </rdf:RDF>
| </x:xmpmeta>
| <?xpacket end='w'?>
| Software: Adobe Photoshop CS Windows
|  Tag 34665: 11762868


can you tell me more?

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?

sure, of course. please go on...


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

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

okay, now i understand the benefits.

steven woody (id: narke)

Pepper...is hot and scorches, just like the sun

        - Politiki kouzina (2003)