Missing TIFF tags flagged as required despite having default values

Question

Missing TIFF tags flagged as required despite having default values

marhop opened this issue 4 years ago · comments

ExifTool version: 11.99

Running exiftool -validate -warning -a on the attached file (source) raises two warnings:

Missing required TIFF IFD0 tag 0x0102 BitsPerSample
Missing required TIFF IFD0 tag 0x0128 ResolutionUnit

However, this is a very simple bilevel (black/white) TIFF file where the default values for BitsPerSample (1) and ResolutionUnit (2 = inch) given in the TIFF 6.0 specification are appropriate. According to the spec (pages 21, 26) in this case it is permitted to omit these tags.

What do you think? Are these tags really required for (bilevel) TIFF files?

Thanks,
Martin

Phil Harvey · Answer 1 · Fri May 15 2020 21:43:02 GMT+0800 (China Standard Time)

Hi Martin,

Great, thanks! This will be fixed in version 12.00

Phil

Martin Hoppenheit · Answer 2 · Fri May 15 2020 22:35:01 GMT+0800 (China Standard Time)

Nice, thank you for the quick reply! And for ExifTool in general, by the way. ;-) I've been using it for years, there's nothing better.

Best,
Martin

Phil Harvey · Answer 3 · Mon Jun 15 2020 09:54:16 GMT+0800 (China Standard Time)

Version 12.00 is out