US 11,741,772 B2
Detection method, detection apparatus and detection process
Wuchang Qi, Shandong (CN); Xiaofeng Sun, Shandong (CN); Kai Zhang, Shandong (CN); and Li Jiang, Shandong (CN)
Assigned to WEIHAI HUALING OPTO-ELECTRONICS CO., LTD., Shandong (CN)
Appl. No. 16/966,479
Filed by WEIHAI HUALING OPTO-ELECTRONICS CO., LTD., Shandong (CN)
PCT Filed Apr. 29, 2019, PCT No. PCT/CN2019/085023
§ 371(c)(1), (2) Date Jul. 31, 2020,
PCT Pub. No. WO2020/103402, PCT Pub. Date May 28, 2020.
Claims priority of application No. 201811410212.1 (CN), filed on Nov. 23, 2018.
Prior Publication US 2021/0272406 A1, Sep. 2, 2021
Int. Cl. G06T 7/00 (2017.01); G07D 7/164 (2016.01); G06T 7/90 (2017.01); G07D 7/04 (2016.01)
CPC G07D 7/164 (2013.01) [G06T 7/90 (2017.01); G07D 7/04 (2013.01); G06T 2207/30124 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A detection method, comprising:
using a sensor for idle scanning to obtain a first output electrical signal, and performing feedback correction on the first output electrical signal to eliminate a noise of the first output electrical signal to obtain first correction data;
using the sensor to scan a correction specimen page to obtain a second output electrical signal, and performing the feedback correction on the second output electrical signal to eliminate a noise of the second output electrical signal to obtain second correction data;
calculating third correction data according to the first correction data, the second correction data and an electrical signal predetermined value;
using the sensor to scan a to-be-detected object to obtain a third output electrical signal; and
correcting the third output electrical signal according to the first correction data and the third correction data.