Patent ID: 11877061
Assignee: FUJIFILM CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. A signal processing device comprising:
a blurring detection sensor;
a memory; and
a processor configured to execute:
processing of calculating an amount of direct current component from an output signal of the blurring detection sensor and extracting the amount of direct current component, as a first feature amount relating to an offset;
processing of integrating the output signal;
processing of calculating a gradient of an accumulated integral value of the output signal from a value obtained by integrating the output signal and extracting the gradient of the accumulated integral value, as a second feature amount relating to the offset;
processing of calculating ½ of a sum of the first feature amount and the second feature amount, as the offset;
processing of calculating an absolute value of a difference between the first feature amount and the second feature amount;
processing of measuring a time, during which the absolute value of the difference between the first feature amount and the second feature amount is kept equal to or less than a first threshold value, in a case where the absolute value is equal to or less than the first threshold value;
processing of storing the offset in the memory in a case where the time during which the absolute value is kept equal to or less than the first threshold value is equal to or greater than a second threshold value; and
processing of subtracting the offset stored in the memory from the output signal.