JHOVE issues and error messages

compared with
Current by Roland Suri
on Mar 20, 2019 14:25.

(show comment)
Key
This line was removed.
This word was removed. This word was added.
This line was added.

Changes (2)

View Page History
** *Error analysis:* This error occurred on a TIF file. JHOVE expected to see either value: “1” or “65535” (based on the TIFF specification). Instead the value it was encountering was "2".
* Technical MD Extract:Fail - Error/s returned during metadata extraction (FocalPlaneResolutionUnit value out of range: 4)
** *Error analysis:* This error occurred on a TIF file. JHOVE expected to see a value in the range of: 1 - 3 (based on the TIFF specification). The value appearing is 4.
** *Error analysis:* This error occurred on a TIF file. JHOVE expected to see for tiff tag 37392, called FocalPlaneResolutionUnit, a value in the range of: 1 - 3 (based on the TIFF documentation of Aware Systems). The value appearing is 4. Also EXIF specifies the tag 41488 (also named "FocalPlaneResolutionUnit") with only 3 values. However, according to the newer TIFF/EP-specification (ISO 12234-2:2001), the FocalPlaneResolutionUnit is a SHORT with values 1,2,3,4, or 5. The TIFF/EP-specifikation is newer and is referenced in the Module Info of TIF-hul. The TIFF/EP-specification also makes more sense: The 4 stands for Millimeter and the 5 stands for Micrometer. Since the optical imaging chips became smaller, the imager resolution is stated in terms of number of pixels per micrometer according to ISO 12234-2:2001. Roland Suri (ETH Zurich) asked to correct the JHOVE Tiff module to accept the values 4 and 5 ([https://github.com/openpreserve/jhove/issues/387|https://github.com/openpreserve/jhove/issues/387] mit dem Titel «Incorret JHOVE Error „FocalPlaneResolutionUnit value out of range: 5“ #387»).
* Technical MD Extract:Fail - Error/s returned during metadata extraction (PhotometricInterpretation not defined,ImageWidth not defined,ImageLength not defined,Neither strips nor tiles defined,Neither strips nor tiles defined)
** *Error analysis:* This error occurred on a TIF file. File was missing critical information and so image did not render (however it was not clear from this error message that the issue would result in a file not rendering.)