Image blur correction device and control method

An image blur correction device comprising:

• at least one processor and a memory holding a program which makes the processor function as:
• a feature point tracking unit configured to track a feature point in a captured image and to calculate coordinate information of the feature point as feature point tracking information;
• a three-dimensional coordinate estimating unit configured to estimate a positional relationship including a depth between a subject and an imaging apparatus as three-dimensional coordinates of the feature point on the basis of the feature point tracking information and position attitude information of the imaging apparatus calculated on the basis of shake information relating to shake of the imaging apparatus;
• a control unit configured to control a degree of contribution of the feature point to the estimation of the three-dimensional coordinates;
• a correcting unit configured to correct the position attitude information of the imaging apparatus according to a result of the estimation of the three-dimensional coordinates of the feature point;
• and
• a target position calculating unit configured to calculate a target position of a shake corrector used to correct image blur caused by shake of the imaging apparatus based on the shake information and the position attitude information,
• wherein the control unit controls the degree of contribution according to a reliability of the feature point tracking information or a parallax amount between captured images.