CPC G07D 7/164 (2013.01) [G06T 7/90 (2017.01); G07D 7/04 (2013.01); G06T 2207/30124 (2013.01)] | 20 Claims |
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.
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