Patent ID: 11922683
Assignee: WHEELRIGHT LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 8:
9. A method of reading embossed and/or engraved markings on a sidewall of a tyre, the method comprising:
providing a digital image of the sidewall of the tyre;
unwarping the digital image;
generating a region of interest on the digital image;
applying a classifier to determine if the region of interest is a false positive, and if the region of interest is a false positive, discarding the region of interest, or if the region of interest is not a false positive, selecting the region of interest;
selecting an area of the digital image adjacent to the selected region of interest; and
applying a classifier to the area of the digital image adjacent to the selected region of interest to read the embossed and/or engraved markings,
wherein generating a region of interest on the digital image comprises:
generating a histogram of oriented gradients feature map of the digital image;
inputting the histogram of oriented gradients feature map into a trained neural network, wherein the trained neural network is configured to output a probability based on the input histogram of oriented gradients feature map that a region of pixels of the digital image contains the embossed and/or engraved markings; and
if the probability is at or above a predetermined threshold, accepting the region of pixels as the region of interest.