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1. #Exiftool producers field and country field install
2. #Exiftool producers field and country field software
3. #Exiftool producers field and country field free
4. #Exiftool producers field and country field windows

As far as I know there is no list of all possible error messages of ImageMagick. I have marked every file as invalid that ImageMagick had at least one error message about, even if the error seems to be a minor one, like the encounter of an unknown TIFF field or incorrect contents of tags. Validation: Just to be fair, ImageMagick is not primarily about file validation, but instead about displaying, migrating and working on images.

#Exiftool producers field and country field install

Aside from the GUI output not being handy when dealing with many files, JHOVE is very easy to install and use, as one could just throw (drag & drop) files and folders at it and it will validate them all. Handling: As the GUI output never suited me, I have long ago begun to use JHOVE as a java library and have my own html output, which is very user-friendly. In forms of transparency, it is described on the JHOVE website which requirements a TIFF file must met to be well-formed or well-formed and valid. There are almost 70 known TIFF error and info messages in the JHOVE module, most of them carry their meaning within the message like “ TileLength not defined” and even a passer-by with a minimum of fantasy can imagine why information about the tile length might come in handy for an image. The findings are intelligible and the expectations for the file to follow the TIFF specification seem reasonable. Validation: JHOVE is my to-go-validator for TIFF files. In the following paragraphs, I introduce the tools I have used for this analysis in more detail: JHOVE For checkit_tiff and LibTIFF two colleagues helped me out and sent me the findings for me to analyse.

#Exiftool producers field and country field windows

I had some help with a suitable batch-script for ImageMagick and ExifTool, but at least I could easily run the tests on my windows machine (unlike checkit_tiff, for example, which requires Linux). In summary, I was able to analyse the test suite with six tools. Heinz from the German nestor format identification group has run the test suite for me Help for the batch-script from Mario from the German nestor format identification groupĪndreas, checkit_tiff developer from the SLUB Dresden has run the test suite for me Help for the batch-script via twitter from David Underdown and the ImageMagick people I selected the following tools for my test: Most tools are not out-of-the-box tools with a nice GUI like JHOVE, which can be used by you and me on a windows machine. Furthermore, the libtiff library offers many programs that can be integrated in other tools (see e. Some are listed in COPTR (search for “TIFF” and “validation”, though some tools like ExifTool do some validation and are not marked as validation tools). My research question: Is the JHOVE TIFF module really that good in comparison with other tools?Īnd, as a side-effect: Is TIFF validation really easy-peasy? TIFF validation toolsįirst, there seem to be plethora of tools to test TIFF-validity, analyse TIFF-tags and even repair common errors.

#Exiftool producers field and country field software

As the JHOVE validation tool is widespread in the digital preservation community and integrated in out-of-the-box digital preservation software like Rosetta and Preservica, the reliance of JHOVE is especially interesting for the formats we possibly all have in our archives, like TIFF images.

#Exiftool producers field and country field free

The statement of a validation tool usually is relied on without a second thought, although most validation tools are not free from false negatives and false positives.

As the analysis went on I had to admit that the reality is much more complicated. In theory, my goal is the same with this examination, except being focussed on TIFF, but my initial intention was admittedly biased: I wanted to prove that the JHOVE TIFF module indeed is infallible and that TIFF validation is, as I have always known, easy-peasy. My goal was to analyse if the JHOVE JPEG module is reliable, as we are basing our preservation decisions on it. Last fall, I have compared the validation tools JHOVE and Bad Peggy and how they both deal with JPEG validation (see OPF Blogpost ). Besides, the “myriad alternatives” often seem difficult to use for me on my windows machine with my limited experience with command-line-tools and batch-scripting. That’s why nobody uses the myriad alternatives to it, although it’s so easy to write a TIFF validator, I could almost do it myself.īut while my colleague Michelle and I are drafting a paper for the IDCC this february, it dawned on me: “Everybody” has never written about the infallibility of JHOVE in a paper or Blogpost so far, or has run a thorough test that I know of.

I have never doubted the JHOVE TIFF module.