Focusing control device, imaging device, focusing control method, and focusing control program

A focusing control method comprising:

• a focusing position determination step of causing an imaging element imaging a subject through a focus lens to image the subject for each position of the focus lens while moving the focus lens movable in an optical axis direction and determining a focusing position of the focus lens based on a captured image signal obtained through the imaging;
• a face detection step of performing face detection processing on the captured image signal obtained by imaging the subject with the imaging element;
• an eye detection step of performing eye detection processing on the captured image signal obtained by imaging the subject with the imaging element;
• a specific region determination step of, based on a face region detected in the face detection step from a first captured image signal obtained through imaging with the imaging element at an arbitrary time and an eye region detected in the eye detection step from a second captured image signal obtained through imaging with the imaging element at a time before the arbitrary time, determining a specific region indicating a region to be focused in the captured image signal;
• and
• a drive step of driving the focus lens to a focusing position determined in the focusing position determination step based on a signal of the specific region determined in the specific region determination step in the captured image signal.

A computer readable medium storing a focusing control program which causes a computer to execute:

• a focusing position determination step of causing an imaging element imaging a subject through a focus lens to image the subject for each position of the focus lens while moving the focus lens movable in an optical axis direction and determining a focusing position of the focus lens based on a captured image signal obtained through the imaging;
• a face detection step of performing face detection processing on the captured image signal obtained by imaging the subject with the imaging element;
• an eye detection step of performing eye detection processing on the captured image signal obtained by imaging the subject with the imaging element;
• a specific region determination step of, based on a face region detected in the face detection step from a first captured image signal obtained through imaging with the imaging element at an arbitrary time and an eye region detected in the eye detection step from a second captured image signal obtained through imaging with the imaging element at a time before the arbitrary time, determining a specific region indicating a region to be focused in the captured image signal;
• and
• a drive step of driving the focus lens to a focusing position determined in the focusing position determination step based on a signal of the specific region determined in the specific region determination step in the captured image signal.