Signal processing device, signal processing method, signal processing program, imaging apparatus and lens apparatus

A signal processing method for processing a signal which is output from a blurring detection sensor in progress of exposure of an imaging element, the signal processing method comprising:

• processing of generating a second signal obtained by performing high-pass filter processing on a first signal which is output from the blurring detection sensor;
• and
• processing of calculating an amount of blurring on the basis of the first signal or the second signal,
• wherein in the processing of calculating the amount of blurring, a signal to be used for calculating the amount of blurring is switched on the basis of an exposure time of the imaging element and an elapsed time for calculation in the high-pass filter processing.

A non-transitory, computer-readable tangible recording medium which records thereon a program that causes, when read by a computer, the computer to execute:

• processing of acquiring a signal which is output from a blurring detection sensor in progress of exposure of an imaging element;
• processing of generating a second signal obtained by performing high-pass filter processing on a first signal which is output from the blurring detection sensor;
• and
• processing of calculating an amount of blurring on the basis of the first signal or the second signal,
• wherein in the processing of calculating the amount of blurring, a signal to be used for calculating the amount of blurring is switched on the basis of an exposure time of the imaging element and an elapsed time for calculation in the high-pass filter processing.