Image blur correction apparatus, optical apparatus, and method thereof

摘要

An image blur correction apparatus includes an shooting state detecting portion that determines a shooting state of a first shooting state or a second shooting state based on an angular velocity signal, and a controller that performs an image blur correction using characteristics depending on a determination result of the shooting state determining portion, and the shooting state determining portion determines that the first shooting state has started when the angular velocity signal exceeds a first threshold value and exceeds a second threshold value having an opposite sign of the first threshold value within a predetermined time after exceeding the first threshold value, and determines that the first shooting state is continuously maintained when the angular velocity signal exceeds a third threshold value and exceeds a fourth threshold value that has an opposite sign of the third threshold value within the predetermined time after exceeding the third threshold value.

主权项

1. An image blur correction apparatus comprising:
a microcomputer configured to execute:
a shooting state determining task that determines a shooting state of one of a first shooting state or a second shooting state based on an angular velocity signal;an image blur correction task that performs an image blur correction using characteristics depending on a determination result of the shooting state determining task;a first shooting start state determining task that determines that the first shooting state has started:
when, within a first predetermined period after the angular velocity signal exceeds a first positive threshold value, the angular velocity signal falls below a second negative threshold value; anda first shooting end state determining task that determines, while in the first shooting state, that the first shooting state has ended:
when, during a second predetermined period after the angular velocity signal does not exceed a third positive threshold value, the angular velocity signal does not fall below a fourth negative threshold value for an entire time of the second predetermined period, andwherein the third positive threshold value is smaller than the first positive threshold and the absolute value of the fourth negative threshold value is smaller than the absolute value of the second negative threshold value.