Unintentional hand movement canceling device and imaging apparatus
View Patent ↗Provided is an unintentional hand movement canceling device, comprising: swing detecting means detecting a swing of an image; and a correction quantity generating means generating a correction quantity to calculate a correction position based on a swing quantity detected by the swing detection means, a damping coefficient of a swing quantity for controlling a characteristic of a non-corrected residue percent at a swing frequency and a damping center for controlling a centering velocity at which a correction position is caused to move to an initial position before correction, the correction quantity having a variable characteristic of a non-corrected residue percent at a frequency of the swing and a variable centering velocity at which a correction position is caused to move to an initial position before correction, wherein the correction quantity generating means includes means updating the damping center based on a preset damping coefficient of the damping center.
1. An unintentional hand movement canceling device, comprising:
a swing detecting unit ( 18 ), ( 20 ) arranged to detect a swing of an image; and
a correction quantity generating unit ( 20 ) arranged to generate a correction quantity S n to calculate a correction position based on a swing quantity V n detected by the swing detection unit ( 18 ), ( 20 ), a damping coefficient K of a swing quantity for controlling a characteristic of a non-corrected residue percent at a swing frequency and a damping center C of the swing quantity, the correction quantity having a variable characteristic of a non-corrected residue percent at a frequency of the swing and a variable damping center of a swing quantity, wherein
the correction quantity S n is represented by a function f(S n−1, V n , K, C), where the function has S n−1 , V n , K and C as its elements, and S n−1 is a correction quantity in a preceding frame, V n is the swing quantity, K is the damping coefficient of the swing quantity and C is the damping center of the swing quantity, wherein
the function f(S n−1 , V n , K, C) is represented by the following equation:
S n =K· (S n−1 −C)+ V n +C.
2. The unintentional hand movement canceling device according to claim 1 , wherein
the damping center C of the swing quantity is updated based on C=K c ·C each time the correction quantity S n is updated, where K c is a damping coefficient of the damping center.
3. An imaging apparatus, comprising:
a swing detecting unit ( 18 ), ( 20 ) arranged to detect a swing of an image; and
a correction quantity generating unit ( 20 ) arranged to generate a correction quantity S n to calculate a correction position based on a swing quantity V n detected by the swing detection unit ( 18 ), ( 20 ), a damping coefficient K of a swing quantity for controlling a characteristic of a non-corrected residue percent at a swing frequency and a damping center C of the swing quantity, the correction quantity having a variable characteristic of a non-corrected residue percent at a frequency of the swing and a variable damping center of a swing quantity, wherein
the correction quantity S n is represented by a function f(S n−1 , V n , K, C), where the function has S n−1 , V n , K and C as its elements, and S n−1 is a correction quantity in a preceding frame, V n is the swing quantity, K is the damping coefficient of the swing quantity and C is the damping center of the swing quantity, wherein
the function f(S n−1 , V n , K, C) is represented by the following equation:
S n =K· ( S n−1 −C )+ V n +C.
4. The imaging apparatus according to claims 3 , wherein the damping center C of the swing quantity is updated based on C=K c ·C each time the correction quantity S n is updated, where K c is a damping coefficient of the damping center.