Patent classifications
G
PHYSICS
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G06
COMPUTING OR CALCULATING; COUNTING
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G06V
IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
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10/00
Arrangements for image or video recognition or understanding
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G06V10/24
Aligning, centring, orientation detection or correction of the image
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G06V10/247
by affine transforms, e.g. correction due to perspective effects; Quadrilaterals, e.g. trapezoids
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