Focus adjustment operation detection device, focus adjustment operation detection method, focus adjustment operation detection program, imaging device main body, and imaging device

A focus adjustment operation detection device comprising:

• an image sensor configured to image an optical image passed through an imaging lens, the image sensor having an imaging surface divided into a plurality of divided areas each of which includes a first phase difference detection pixel and a second phase difference detection pixel;
• and
• at least one processor configured to:
• detect a phase difference for each divided area based on an output of the first phase difference detection pixel and an output of the second phase difference detection pixel;
• calculate correlation between a signal of the first phase difference detection pixel and a signal of the second phase difference detection pixel when calculating the phase difference and determine that the phase difference is reliable in a case where the calculated correlation is equal to or greater than a threshold value;
• and
• detect whether or not a focus adjustment operation of the imaging lens is performed based on an amount of the phase difference of each divided area whose phase difference is determined to be reliable.

A focus adjustment operation detection device comprising:

• an image sensor configured to image an optical image passed through an imaging lens, the image sensor having an imaging surface divided into a plurality of divided areas each of which includes a phase difference detection pixel;
• and
• at least one processor configured to:
• detect a phase difference for each divided area based on an output of the phase difference detection pixel;
• analyze an image to be imaged by the imaging sensor and detect a moving body in a divided area to be imaged;
• detect whether or not a focus adjustment operation of the imaging lens is performed based on an amount of change in the phase difference for each divided area, wherein the divided area in which the moving body is detected is excluded in the detection of whether or not the focus adjustment operation of the imaging lens is performed.

A focus adjustment operation detection device comprising:

• an image sensor configured to image an optical image passed through an imaging lens, the image sensor having an imaging surface divided into a plurality of divided areas each of which includes a phase difference detection pixel;
• and
• at least one processor configured to:
• detect a phase difference for each divided area based on an output of the phase difference detection pixel;
• detect luminance for each divided area;
• extract a divided area in which a change in the luminance per unit time is equal to or greater than a first threshold value to estimate the divided area in which a moving body is present;
• and
• detect whether or not a focus adjustment operation of the imaging lens is performed based on an amount of change in the phase difference for each divided area, wherein the divided area which is estimated that the moving body is present therein is excluded in the detection of whether or not the focus adjustment operation of the imaging lens is performed.

A focus adjustment operation detection method comprising:

• detecting a phase difference for each divided area of an image to be imaged by an image sensor which is configured to image an optical image passed through an imaging lens and has an imaging surface divided into a plurality of divided areas each of which includes a phase difference detection pixel, based on an output of the phase difference detection pixel;
• detecting a change in an angle of view;
• and
• detecting whether or not a focus adjustment operation of the imaging lens is performed based on an amount of change in the phase difference for each divided area, in a case where the detected angle of view is maintained at a constant value.

A focus adjustment operation detection method comprising:

• detecting a phase difference for each divided area of an image to be imaged by an image sensor which is configured to image an optical image passed through an imaging lens and has an imaging surface divided into a plurality of divided areas each of which includes a first phase difference detection pixel and a second phase difference detection pixel, based on an output of the phase difference detection pixel;
• determining whether or not the phase difference for each divided area is reliable, wherein correlation between a signal of the first phase difference detection pixel and a signal of the second phase difference detection pixel is calculated and it is determined that the phase difference is reliable in a case where the calculated correlation is equal to or greater than a threshold value;
• and
• detecting whether or not a focus adjustment operation of the imaging lens is performed based on an amount of the phase difference of each divided area whose phase difference is determined to be reliable.

A focus adjustment operation detection method comprising:

• detecting a phase difference for each divided area of an image to be imaged by an image sensor which is configured to image an optical image passed through an imaging les and has an imaging surface divided into a plurality of divided areas each of which includes a phase difference detection pixel, based on an output from the phase difference detection pixel;
• and
• analyzing the image to be imaged by the imaging sensor to detect a moving body in a divided area to be imaged;
• detecting whether or not a focus adjustment operation of the imaging lens is performed based on an amount of change in the phase difference for each divided area, wherein the divided area in which the moving body is detected is excluded in the detecting of whether or not the focus adjustment operation of the imaging lens is performed.

A focus adjustment operation detection method comprising:

• detecting a phase difference for each divided area of an image to be imaged by an image sensor which is configured to image an optical image passed through an imaging les and has an imaging surface divided into a plurality of divided areas each of which includes a phase difference detection pixel, based on an output from the phase difference detection pixel;
• and
• detecting luminance for each divided area;
• extracting a divided area in which a change in the luminance per unit time is equal to or greater than a first threshold value to estimate the divided area in which a moving body is present;
• and
• detecting whether or not a focus adjustment operation of the imaging lens is performed based on an amount of change in the phase difference for each divided area, wherein the divided area which is estimated that the moving body is present therein is excluded, in the detecting of whether or not the focus adjustment operation of the imaging lens is performed.

A non-transitory computer-readable recording medium causing a computer to realize a focus adjustment operation detection function in a case where a command stored in the recording medium is read by the computer, the focus adjustment operation detection function comprising the functions of:

• detecting a phase difference for each divided area of an image to be imaged by an image sensor which is configured to image an optical image passed through an imaging lens and has an imaging surface divided into a plurality of divided areas each of which includes a phase difference detection pixel, based on an output of the phase difference detection pixel;
• detecting a change in an angle of view;
• and
• detecting whether or not a focus adjustment operation of the imaging lens is performed based on an amount of change in the phase difference for each divided area, in a case where the detected angle of view is maintained at a constant value.

A non-transitory computer-readable recording medium causing a computer to realize a focus adjustment operation detection function in a case where a command stored in the recording medium is read by the computer, the focus adjustment operation detection function comprising the functions of:

• detecting a phase difference for each divided area of an image to be imaged by an image sensor which is configured to image an optical image passed through an imaging lens and has an imaging surface divided into a plurality of divided areas each of which includes a first phase difference detection pixel and a second phase difference detection pixel, based on an output of the phase difference detection pixel;
• determining whether or not the phase difference for each divided area is reliable, wherein correlation between a signal of the first phase difference detection pixel and a signal of the second phase difference detection pixel is calculated and it is determined that the phase difference is reliable in a case where the calculated correlation is equal to or greater than a threshold value;
• and
• detecting whether or not a focus adjustment operation of the imaging lens is performed based on an amount of the phase difference of each divided area whose phase difference is determined to be reliable.

A non-transitory computer-readable recording medium causing a computer to realize a focus adjustment operation detection function in a case where a command stored in the recording medium is read by the computer, the focus adjustment operation detection function comprising the functions of:

• detecting a phase difference for each divided area of an image to be imaged by an image sensor which is configured to image an optical image passed through an imaging les and has an imaging surface divided into a plurality of divided areas each of which includes a phase difference detection pixel, based on an output from the phase difference detection pixel;
• and
• analyzing the image to be imaged by the imaging sensor to detect a moving body in a divided area to be imaged;
• detecting whether or not a focus adjustment operation of the imaging lens is performed based on an amount of change in the phase difference for each divided area, wherein the divided area in which the moving body is detected is excluded in the detecting of whether or not the focus adjustment operation of the imaging lens is performed.

A non-transitory computer-readable recording medium causing a computer to realize a focus adjustment operation detection function in a case where a command stored in the recording medium is read by the computer, the focus adjustment operation detection function comprising the functions of:

• detecting a phase difference for each divided area of an image to be imaged by an image sensor which is configured to image an optical image passed through an imaging les and has an imaging surface divided into a plurality of divided areas each of which includes a phase difference detection pixel, based on an output from the phase difference detection pixel;
• and
• detecting luminance for each divided area;
• extracting a divided area in which a change in the luminance per unit time is equal to or greater than a first threshold value to estimate the divided area in which a moving body is present;
• and
• detecting whether or not a focus adjustment operation of the imaging lens is performed based on an amount of change in the phase difference for each divided area, wherein the divided area which is estimated that the moving body is present therein is excluded, in the detecting of whether or not the focus adjustment operation of the imaging lens is performed.