US 12,221,244 B2
Machine vision-based sheet labeling method and apparatus, device and storage medium
Ming Ge, Hangzhou (CN); Jingxue Shen, Hangzhou (CN); Jiang Wei, Hangzhou (CN); and Junwei Xu, Hangzhou (CN)
Assigned to Hangzhou Baizijian Technology Co., LTD, Hangzhou (CN)
Filed by Hangzhou Baizijian Technology Co., Ltd, Hangzhou (CN)
Filed on Jun. 7, 2024, as Appl. No. 18/737,279.
Claims priority of application No. 202310666092.6 (CN), filed on Jun. 7, 2023.
Prior Publication US 2024/0409264 A1, Dec. 12, 2024
Int. Cl. G06T 7/73 (2017.01); B65C 9/18 (2006.01); B65C 9/40 (2006.01); B65C 9/46 (2006.01); B65H 9/20 (2006.01); G06T 7/00 (2017.01)
CPC B65C 9/40 (2013.01) [B65C 9/18 (2013.01); B65C 9/46 (2013.01); B65H 9/20 (2013.01); G06T 7/001 (2013.01); G06T 7/74 (2017.01); B65C 2009/405 (2013.01); B65H 2301/5111 (2013.01); B65H 2553/51 (2013.01); G06T 2207/30108 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A machine vision-based sheet defect labeling method, comprising:
performing a defect inspection on a target sheet conveyed to a preset defect inspection position, wherein the target sheet continues to be conveyed towards a preset labeling position after passing the preset defect inspection position by being conveyed;
determining a defect label of the target sheet when a defect is present in the target sheet, wherein the defect label carries defect information represented by a two-dimensional barcode symbol comprising discontinuous dots, wherein the two-dimensional barcode symbol is generated by using DotCode technology; and
labeling the defect of the target sheet at the preset labeling position with the defect label of the target sheet;
wherein the determining a defect label of the target sheet when a defect is present in the target sheet comprises:
receiving the defect information of the target sheet when the defect is present in the target sheet according to a preset receiving frequency, wherein the preset receiving frequency is configured according to an accuracy of labeling defects of sheets on a production line; and
generating the defect label of the target sheet based on the defect information of the target sheet;
wherein the generating the defect label of the target sheet based on the defect information of the target sheet comprises:
performing encoding based on the defect information of the target sheet to generate defect code content of the target sheet; and
printing the defect code content of the target sheet on a label tape to obtain the defect label of the target sheet;
wherein the performing encoding based on the defect information of the target sheet to generate defect code content of the target sheet comprises:
in response to that both the target sheet and an adjacent sheet have defects, generating the defect code content of the target sheet by performing encoding based on the defect information of the target sheet and defect information of the adjacent sheet, wherein the adjacent sheet is a sheet that is adjacent to the target sheet in position and has been conveyed and reached the preset defect inspection position before the target sheet is conveyed and reaches the preset defect inspection position, and continues to be conveyed towards the preset labeling position after passing the preset defect inspection position; and
in response to that defects are present in a plurality of sheets in adjacent areas, merging defects of a plurality of adjacent sheets, and performing code printing and labeling for the plurality of adjacent sheets in one time, wherein the defect code content of the target sheet comprises the defect information of the target sheet and defect information of at least one of the plurality of adjacent sheet, the defect information comprises position information of the defect, and the position information of the defect is a coordinate position relative to the target sheet.