Camera device and shake correction method

Patent metadata

Field	Value
Publication number	US-2018288299-A1
Application number	US-201815923601-A
Country	US
Kind code	A1
Filing date	Mar 16, 2018
Priority date	Mar 31, 2017
Publication date	Oct 4, 2018
Grant date	—

Abstract

A camera device includes a lens on which subject light is incident, an imaging element that images an image based on the subject light, a shake sensor that detects shake of the camera device, a shake correction mechanism that holds a holder which holds the imaging element and performs shake correction on a captured image captured by the imaging element through driving of the holder, a characteristic estimator that estimates characteristics of the lens based on a detection value of the shake sensor and a shake correction amount of the shake correction mechanism, and a controller that causes the shake correction mechanism to drive the holder by using the detection value of the shake sensor and an estimation result of the characteristics of the lens.

First claim

1 . A camera device which is a fixed to a fixing target surface, and is provided in a place in which shaking occurs on the fixing target surface, the camera comprising:
a lens on which subject light is incident; an imaging element that images an image based on the subject light; a shake sensor that detects shake of the camera device; a shake correction mechanism that holds a holder which holds the imaging element, and performs shake correction on a captured image captured by the imaging element through driving of the holder based on a detection value of the shake sensor; a characteristic estimator that estimates characteristics of the lens based on the detection value of the shake sensor and a shake correction amount of the shake correction mechanism; and a controller that causes the shake correction mechanism to drive the holder by using the detection value of the shake sensor and an estimation result of the characteristics of the lens.

2 . The camera device of claim 1 , further comprising:
a shake correction amount calculator that calculates the shake correction amount of the shake correction mechanism based on the captured image on which the shake correction is performed; and a residual shake amount calculator that calculates a residual shake amount on the captured image on which the shake correction is performed based on the calculated shake correction amount and the detection value of the shake sensor, wherein the characteristic estimator determines whether or not it is necessary to estimate the characteristics of the lens based on the calculated residual shake amount on the captured image.

3 . The camera device of claim 2 , further comprising:
a coefficient calculator that calculates a coefficient for converting the detection value of the shake sensor into the shake correction amount of the shake correction mechanism by using the estimation result of the characteristics of the lens when the calculated residual shake amount on the captured image becomes a predetermined minimum value.

4 . The camera device of claim 2 ,
wherein the characteristic estimator repeatedly estimates the characteristics of the lens based on the residual shake amount on the captured image after the shake correction is performed by the shake correction mechanism by using the estimation result of the characteristics of the lens until the calculated residual shake amount on the captured image becomes a predetermined minimum value.

5 . The camera device of claim 1 ,
wherein the shake sensor is attached to a housing of a lens unit including the lens.

6 . A shake correction method using a camera device which is fixed to a fixing target surface and is provided in a place in which shaking occurs on the fixing target surface, the method comprising:
detecting shake of the camera device; a step of imaging an image based on subject light by an imaging element; performing shake correction on a captured image captured by the imaging element through driving of a holder which holds the imaging element based on a detection value of the detected shake of the camera device; estimating characteristics of a lens on which the subject light is incident based on the detection value of the detected shake of the camera device and a shake correction amount of the captured image; and driving the holder in the shake correction by using the detection value of the detected shake of the camera device and an estimation result of the characteristics of the lens.

Assignees

• Panasonic Ip Man Co Ltd
• Panasonic Ip Man Co Ltd

Inventors

• Wada Jyouji
• Iiizumi Masaomi
• Yamada Hideaki
• Ohara Masamichi
• Shimaoka Takayuki

Classifications

• H04N23/685 Primary

  performed by mechanical compensation · CPC title

• H04N23/6812 Primary

  based on additional sensors, e.g. acceleration sensors · CPC title

• H04N5/2328 Primary

  Electricity · mapped topic

• H04N5/23258

  Electricity · mapped topic