JP2015136019A5

JP2015136019A5 -

Info

Publication number: JP2015136019A5
Application number: JP2014006225A
Authority: JP
Filing date: 2014-01-16
Publication date: 2017-02-16
Anticipated expiration: 2034-01-16

Description

上記課題を解決するために、本発明に係る装置は、複数の像ブレ補正手段により画像のブレを補正する像ブレ補正装置であって、振れ検出手段から出力された振れ検出信号をデジタルフィルタにより低周波信号と高周波信号に分離する信号分離手段と、前記高周波信号から第１補正量を算出し、かつ前記低周波信号から第２補正量を算出するか、または前記低周波信号から第１補正量を算出し、かつ前記高周波信号から第２補正量を算出する算出手段と、前記信号分離手段を制御する制御手段と、を備える。
前記制御手段は、前記高周波信号から前記算出手段が前記第１補正量を算出して前記複数の像ブレ補正手段のうちの第１像ブレ補正手段に出力し、かつ前記低周波信号から前記算出手段が前記第２補正量を算出して前記複数の像ブレ補正手段のうちの第２像ブレ補正手段に出力する第１制御と、前記低周波信号から前記算出手段が前記第１補正量を算出して前記第１像ブレ補正手段に出力し、かつ前記高周波信号から前記算出手段が前記第２補正量を算出して前記第２像ブレ補正手段に出力する第２制御とを切り替える際に、前記デジタルフィルタの演算結果として保持されている中間値を変更して前記第１補正量および第２補正量の信号を連続的に変化させる制御を行う。 In order to solve the above problems, the device according to the present invention, there is provided a image blur correction apparatus for correcting image blur by a plurality of image blur correction means, de a shake detection signal output from the shake detection means digital filter And a signal separation means for separating the signal into a low frequency signal and a high frequency signal, a first correction amount is calculated from the high frequency signal and a second correction amount is calculated from the low frequency signal, or a first correction amount is calculated from the low frequency signal. It calculates a correction amount, and comprises calculation means for calculating a second correction amount from said high-frequency signal, and a control means for controlling the pre-SL signal separating means.
The control means calculates the first correction amount from the high frequency signal and outputs the first correction amount to the first image blur correction means of the plurality of image blur correction means , and the calculation from the low frequency signal. A first control unit that calculates the second correction amount and outputs the second correction amount to a second image blur correction unit of the plurality of image blur correction units; and the calculation unit calculates the first correction amount from the low-frequency signal. When calculating and outputting to the first image blur correcting unit, and switching the second control from which the calculating unit calculates the second correction amount based on the high-frequency signal and outputs the second correction amount to the second image blur correcting unit. Then, control is performed to continuously change the signals of the first correction amount and the second correction amount by changing the intermediate value held as the calculation result of the digital filter.

Claims

An image blur correction apparatus for correcting image blur by a plurality of image blur correction means,
A signal separating means for separating the low frequency signal and a high frequency signal by the shake digital filter the outputted vibration detection signal from the detection means,
A first correction amount is calculated from the high frequency signal and a second correction amount is calculated from the low frequency signal, or a first correction amount is calculated from the low frequency signal and a second correction amount is calculated from the high frequency signal. a calculation means for calculating,
And a control means for controlling a pre-SL signal separating means, and
The control means calculates the first correction amount from the high frequency signal and outputs the first correction amount to the first image blur correction means of the plurality of image blur correction means , and the calculation from the low frequency signal. A first control unit that calculates the second correction amount and outputs the second correction amount to a second image blur correction unit of the plurality of image blur correction units; and the calculation unit calculates the first correction amount from the low-frequency signal. When calculating and outputting to the first image blur correcting unit, and switching the second control from which the calculating unit calculates the second correction amount based on the high-frequency signal and outputs the second correction amount to the second image blur correcting unit. An image blur correction apparatus that performs control to continuously change signals of the first correction amount and the second correction amount by changing an intermediate value held as a calculation result of the digital filter.

The signal separation means has switching means for switching the output destination of the low frequency signal and the high frequency signal by a control signal from the control means,
The calculation means includes first calculation means for calculating the first correction amount from the low frequency signal or high frequency signal acquired from the switching means, and the second from the low frequency signal or high frequency signal acquired from the switching means. The image blur correction apparatus according to claim 1, further comprising a second calculation unit that calculates a correction amount.

The digital filter has a high-pass filter characteristic or a low-pass filter characteristic, and the signal separation means calculates a difference between the shake detection signal and the output signal of the digital filter,
The calculation means obtains an output signal of the digital filter or the difference signal to calculate the first correction amount, and obtains an output signal of the digital filter or the difference signal to obtain the first correction amount. The image blur correction apparatus according to claim 1, further comprising a second calculation unit configured to calculate a second correction amount.

An integration means for converting the angular velocity signal of the shake into an angle signal or a position signal;
4. The image blur correction according to claim 1, wherein the signal separation unit acquires a signal from the integration unit as the shake detection signal and separates the signal into a low frequency signal and a high frequency signal. apparatus.

An optical apparatus comprising the image blur correction device according to claim 1.

An imaging apparatus comprising the image blur correction apparatus according to claim 1.

The control means changes to the first control when the zoom magnification of the photographing optical system is greater than or equal to a threshold value, and changes to the second control when the zoom magnification of the photographing optical system is smaller than the threshold value. The imaging device according to claim 6.

A control method executed by an image blur correction apparatus that corrects image blur by a plurality of image blur correction means,
Signal separating means controlled by the control means, a signal separation step for separating a low frequency signal and a high frequency signal by the shake digital filter the outputted vibration detection signal from the detection means,
The calculating means calculates a first correction amount from the high-frequency signal and calculates a second correction amount from the low-frequency signal, or calculates a first correction amount from the low-frequency signal and calculates from the high-frequency signal It includes a calculation step of calculating a second correction amount, and
In the calculating step, the control unit outputs the first correction amount calculated by the calculating unit from the high-frequency signal to a first image blur correcting unit of the plurality of image blur correcting units , and the low frequency A first control in which the calculation means outputs the second correction amount to a second image blur correction means of the plurality of image blur correction means from a signal; and the first control means that the calculation means calculates from the low frequency signal. When switching between the second control for outputting the correction amount to the first image blur correcting unit and outputting the second correction amount calculated by the calculating unit from the high-frequency signal to the second image blur correcting unit, A control method for an image blur correction apparatus, wherein control is performed to continuously change signals of the first correction amount and the second correction amount by changing an intermediate value held as a calculation result of the digital filter. .