Camera shake correction device, camera shake correction method and imaging device

A camera shake correction device comprising:

• a detection unit configured to detect movement of an imaging device, and to output motion data representing the detected movement;
• an object-region extraction unit configured to extract a target object region from a photographed image obtained by an imaging unit in the imaging device, and to output position data of the extracted object region for each frame of the photographed image;
• a correction unit configured to perform camera shake correction on the photographed image based on the position data of the object region and the motion data;
• and
• a discrimination unit configured to receive the position data of the extracted object region for each frame and the motion data, and, to detect movement of the imaging device between adjacent frames based on the position data of the object region for each frame and on the motion data, and to determine whether the movement of the imaging device is camera shake,
• wherein said correction unit performs the camera shake correction processing on the camera shake based on the determination of the discrimination unit, wherein the discrimination unit determines that movement of the imaging device is camera shake upon detecting, based on the position data of the object region for each frame and the motion data, movement of the imaging device that causes the object region to move outward from an imaging region of the imaging unit, whereas the discrimination unit determines that the movement of the imaging device is not camera shake upon detecting movement of the imaging device causing the object region to move inward within the imaging region of the imaging unit.

An imaging device comprising:

• an imaging unit configured to photograph a subject, and output a photographed image;
• and
• a correction unit configured to detect camera shake of the imaging device based on the photographed image, to perform camera shake correction processing, and to output a valid photographed image which is a partial image of the photographed image, said correction unit comprising:
• a detection unit configured to detect movement of the imaging device, and to output motion data representing the movement;
• an object-region extraction unit configured to extract a target object region from a photographed image obtained by the imaging unit in the imaging device, and to output position data of the extracted object region for each frame of the photographed image;
• a discrimination unit configured to receive the position data of the extracted object region for each frame and the motion data, and, based on the position data of the object region for each frame and the motion data, to detect movement of the imaging device between adjacent frames, and to determine whether the movement of the imaging device is camera shake, and
• an extraction unit configured to perform camera shake correction for the photographed image on the basis of the discrimination result of the discrimination unit, to extract a valid photographed image from the photographed image, and to output the valid photographed image,
• wherein the discrimination unit determines that movement of the imaging device is camera shake upon detecting, based on the position data of the object region for each frame and the motion data, the movement of the imaging device that causes the object region to move outward from an imaging region of the imaging unit, whereas the discrimination unit determines that movement of the imaging device is not camera shake upon detecting the movement of the imaging device causing the object region to move inward within the imaging region of the imaging unit.

A camera shake correction method comprising the steps of:

• detecting movement of an imaging device, and outputting motion data representing the movement;
• extracting a target object region from a photographed image obtained by an imaging unit in the imaging device;
• and
• performing camera shake correction of the photographed image, the camera shake correction on the photographed image is performed based on a moving direction of the target object region in the photographed image wherein when the moving direction of the target object image is outward of the photographed image, the correction unit performs the camera shake correction but when the moving direction of the target object image is inward of the photographed image, the correction unit does not perform the camera shake correction.