US 12,086,681 B2
Method for detecting and reading a matrix code marked on a glass substrate
Jean-Baptiste Laudereau, Paris (FR); and Vincent Nier, Paris (FR)
Assigned to SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
Appl. No. 18/042,722
Filed by SAINT-GOBAIN GLASS FRANCE, Courbevoie (FR)
PCT Filed Jul. 22, 2021, PCT No. PCT/EP2021/070592
§ 371(c)(1), (2) Date Feb. 23, 2023,
PCT Pub. No. WO2022/042961, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 20315389 (EP), filed on Aug. 24, 2020.
Prior Publication US 2023/0351130 A1, Nov. 2, 2023
Int. Cl. G06K 7/14 (2006.01)
CPC G06K 7/1417 (2013.01) 16 Claims
OG exemplary drawing
 
1. A computer implemented method for detecting and reading a barcode in an image of a marked glass substrate, said method taking as input a raster image of at least one portion of the marked glass substrate and providing as output an abstract image of said barcode, and said method comprising the following steps:
(a) computing a probability occurrence θ of said barcode in the raster image with a first trained convolutional artificial neural network;
(b) computing coordinates of representative points of a boundary of the barcode in the raster image according to a given threshold σ for the probability occurrence θ computed at step (a);
(c) cropping the raster image to the boundary of the barcode according to said coordinates computed at step (b), and
(d) computing with a second trained convolutional artificial neural network a tensor of probabilities for each pixel of the cropped raster image, said tensor being the abstract image of the barcode.