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PCE
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DIFF Subgroup
G06V 30/16

Image preprocessing

Introduced: January 2022

Full Title

Full titles differ between systems:

IPC:

Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition > Character recognition > Image preprocessing

CPC:

Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition (scanning, transmission or reproduction of documents or the like H04N1/00) > Character recognition > Image preprocessing

Of 6 combined children, 4 exist in both systems.

2 codes are CPC-only extensions.

IPC defines codes here since 2022.

Child Classifications

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  • G06V 30/1607 CPC only CPC only
  • G06V 30/1613 CPC only CPC only
  • G06V 30/162 Quantising the image signal since 2022 IPC+CPC Available in IPC and CPC
  • G06V 30/164 Noise filtering since 2022 IPC+CPC Available in IPC and CPC
  • G06V 30/166 Normalisation of pattern dimensions since 2022 IPC+CPC Available in IPC and CPC
  • G06V 30/168 Smoothing or thinning of the pattern; Skeletonisation since 2022 IPC+CPC Available in IPC and CPC