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Last active July 29, 2020 20:15
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How to count the number of JPEG2000 files found to be valid using jpylyzer
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countValidJP2
jpylyzer *jp2 | grep --extended-regexp "<isValid format=\"jp2\">True</isValid>" | wc --lines
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comstock commented Jun 1, 2018 •
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  • Jpylyzer produces a detailed XML report for each analyzed file, and each valid file with produce a line that includes <isValid format="jp\">True</isValid>.
  • Piping the output through [grep](https://linux.die.net/man/1/grep] searching for all occurrences of <isValid format="jp\">True</isValid>will generate one line for each occurrence.
  • Piping the grep output through wc using the --lines switch will return a count of each file found <isValid format="jp\">True</isValid>.

Comparing the number of files found valid against the know number of JP2 files examined provides a quick method of QC: If the total number of JP2 files matches the number found to be valid, no additional QC is required.

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