Image preprocessing

Introduced: January 2022

Full Title

Full titles differ between systems:

IPC:

Arrangements for image or video recognition or understanding > Image preprocessing

CPC:

Arrangements for image or video recognition or understanding (character recognition in images or video G06V30/10) > Image preprocessing

Of 10 combined children, 9 exist in both systems.

1 codes are CPC-only extensions.

IPC defines codes here since 2022.

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G06V 10/22 by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition since 2022 +3 CPC IPC+CPC Available in IPC and CPC
G06V 10/24 Aligning, centring, orientation detection or correction of the image since 2022 +5 CPC IPC+CPC Available in IPC and CPC
G06V 10/25 Determination of region of interest [ROI] or a volume of interest [VOI] since 2022 IPC+CPC Available in IPC and CPC
G06V 10/255 CPC only CPC only
G06V 10/26 Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion since 2022 +2 CPC IPC+CPC Available in IPC and CPC
G06V 10/28 Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns since 2022 IPC+CPC Available in IPC and CPC
G06V 10/30 Noise filtering since 2022 IPC+CPC Available in IPC and CPC
G06V 10/32 Normalisation of the pattern dimensions since 2022 IPC+CPC Available in IPC and CPC
G06V 10/34 Smoothing or thinning of the pattern; Morphological operations; Skeletonisation since 2022 IPC+CPC Available in IPC and CPC
G06V 10/36 Applying a local operator, i.e. means to operate on image points situated in the vicinity of a given point; Non-linear local filtering operations, e.g. median filtering since 2022 IPC+CPC Available in IPC and CPC