# US 2019/0174062 A1 · Image stabilization apparatus, optical apparatus, and image stabilization method

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- Number: US 2019/0174062 A1
- Document ID: US20190174062A1
- Status: Published application
- Kind: A1
- Application number: 16/270,651
- Filed: 2019-02-08
- Published: 2019-06-06
- Earliest claimed: 2016-08-12
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Shimpei Miyahara
- Web page: https://patentgrep.com/patent/US20190174062A1

## CPC

- H04N 23/6815: {by distinguishing pan or tilt from motion}
- G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing
- H04N 23/68: for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N 23/6811: {based on the image signal}
- H04N 23/6812: {based on additional sensors, e.g. acceleration sensors}
- H04N 23/685: {performed by mechanical compensation}
- G03B 2205/0007: Movement of one or more optical elements for control of motion blur
- G03B 2217/005: Blur detection
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

An image stabilization apparatus includes a processor programmed to function as a first acquirer configured to acquire angular velocity data of an angular velocity sensor, a second acquirer configured to acquire data relating to a position of a correction lens to be driven so as to correct a blur in a captured image, a third acquirer configured to acquire a motion vector calculated based on the captured image, and an estimator configured to estimate an offset component of the angular velocity sensor based on the angular velocity data, the data relating to the position, and the motion vector. The data relating to the position is generated based on the angular velocity data.

## Claims

### Claim 1

An image stabilization apparatus comprising a processor programmed to function as:
a first acquirer configured to acquire angular velocity data of an angular velocity sensor;
a second acquirer configured to acquire data relating to a position of a correction lens to be driven so as to correct a blur in a captured image;
a third acquirer configured to acquire a motion vector calculated based on the captured image; and
an estimator configured to estimate an offset component of the angular velocity sensor based on the angular velocity data, the data relating to the position, and the motion vector,
wherein the data relating to the position is generated based on the angular velocity data.

### Claim 2 (depends on 1)

The image stabilization apparatus according to claim 1, wherein the processor further functions as:
a low-pass filter configured to cut off a high-frequency component from position data of the correction lens based on a detection result of a position detector configured to detect the position of the correction lens, and
a high-pass filter configured to cut off a low-frequency component from data based on the angular velocity data,
wherein the data relating to the position is generated based on an output signal from the low-pass filter and an output signal from the high-pass filter, and
wherein cutoff frequencies of the high-pass filter and the low-pass filter are set based on acquisition sampling of the data relating to the position.

### Claim 3 (depends on 1)

The image stabilization apparatus according to claim 1, wherein the data relating to the position is generated based only on the angular velocity data.

### Claim 4 (depends on 1)

The image stabilization apparatus according to claim 1, wherein the processor further functions as a determiner configured to determine whether the imaging apparatus is panning, based on the angular velocity data and the motion vector,
wherein when the determiner determines that the imaging apparatus is panning, the estimator does not update estimating processing, and when the determiner determines that the imaging apparatus is not panning, the estimator updates the estimating processing.

### Claim 5 (depends on 1)

An optical apparatus including the image stabilization apparatus according to claim 1.

### Claim 6

An image stabilization method comprising:
a first acquiring step configured to acquire angular velocity data of an angular velocity sensor;
a second acquiring step configured to acquire data relating to a position of a correction lens to be driven so as to correct a blur in a captured image;
a third acquiring step configured to acquire a motion vector calculated based on the captured image; and
an estimating step configured to estimate an offset component of the angular velocity sensor based on the angular velocity data, the data relating to the position, and the motion vector,
wherein the data relating to the position is generated based on the angular velocity data.