Abstract: Provided are a method and an apparatus for detecting a thickness of paper, and a storage medium. The method includes: acquiring a first thickness image of a target paper; extracting at least one first thickness feature and at least one second thickness feature from the first thickness image in the first thickness image; performing average processing on gray values of multiple pixel points in the at least one first thickness feature to acquire a first gray value, and the average processing is performed on gray values of the multiple pixel points in the at least one second thickness feature to acquire a second gray value; when the first gray value is smaller than the second gray value of multiple pixel points in at least one second thickness feature, determining that a thickness of a region, corresponding to the at least one second thickness feature, on the target paper has changed.

Abstract: Provided are a method and an apparatus for detecting a thickness of parer, and a storage medium. The method includes: acquiring a first thickness image of a target paper; extracting at least one first thickness feature and at least one second thickness feature from the first thickness image in the first thickness image; performing average processing on gray values of multiple pixel points in the at least one first thickness feature to acquire a first gray value, and the average processing is performed on gray values of the multiple pixel points in the at least one second thickness feature to acquire a second gray value, when the first gray value is, smaller than the second gray value of multiple pixel points in at least one second thickness feature, determining that a thickness of a region, corresponding to the at least one second thickness feature, on the target paper has changed.

Abstract: A magnetic image sensor is provided. The magnetic image sensor includes: a permanent magnet, arranged to generate a magnetic field; at least one magnetic induction chip, and each magnetic induction chip converts the magnetic field to at least one electrical signal; a signal processing chip, arranged to receive the at least one electrical signal of each magnetic induction chip and successively output the at least one electrical signal converted by each magnetic induction chip; a signal sampling hold circuit, arranged to perform signal sampling on electrical signals output by the signal processing chip, and perform signal hold on a electrical signal output by the signal processing chip every time before receiving the next electrical signal output by the signal processing chip; and an interface component, arranged to output the electrical signal output by the signal sampling hold circuit.

Abstract: A device and method for detecting a film thickness are provided. The device includes: a common electrode, a detection electrode, a common electrode voltage generating circuit, and a detection electrode signal processing circuit. A detection channel for a film to be detected is formed between a first common surface and a first detection surface. The common electrode voltage generating circuit is configured to generate a voltage on the common electrode, as to induce an effective signal voltage on the detection electrode. The detection electrode signal processing circuit includes: a reset voltage time sequence control circuit, a time sequence control circuit for transferring the effective signal voltage on the detection electrode and a differential amplifier.