Image pickup apparatus, control method, and non-transitory computer-readable storage medium with aberration and object information acquisition for correcting automatic focus detection

A control method for an image pickup apparatus capable of executing automatic focus detection of an imaging optical system, the control method comprising the steps of:

• acquiring aberration information of the imaging optical system;
• acquiring object information of an object in a focus detecting area;
• determining, based on the aberration information, whether it is necessary to obtain color information, angular information, and spatial frequency information of the object;
• calculating, based on the aberration information of the imaging optical system and the object information, a correction value used to correct a difference between a focus state of a captured image and a result of the automatic focus detection, caused by the aberration of the imaging optical system;
• and
• correcting the result of the automatic focus detection using the correction value.

A non-transitory computer-readable storage medium storing a program that enables a computer to execute a method that includes the steps of:

• executing automatic focus detection of an imaging optical system;
• acquiring aberration information of the imaging optical system;
• acquiring object information of an object in a focus detecting area;
• determining, based on the aberration information, whether it is necessary to obtain color information, angular information, and spatial frequency information of the object;
• calculating, based on the aberration information of the imaging optical system and the object information, a correction value used to correct a difference between a focus state of a captured image and a result of the automatic focus detection, caused by the aberration of the imaging optical system;
• and
• correcting the result of the automatic focus detection using the correction value.

An image pickup apparatus capable of executing automatic focus detection of an imaging optical system, the image pickup apparatus comprising:

• a first acquisition unit configured to acquire aberration information of the imaging optical system;
• a second acquisition unit configured to acquire object information of an object in a focus detecting area;
• a determination unit configured to determine, based on the aberration information, whether it is necessary to obtain color information of the object;
• a calculation unit configured to calculate, based on the aberration information of the imaging optical system and the object information, a correction value used to correct a difference between a focus state of a captured image and a result of the automatic focus detection, caused by the aberration of the imaging optical system;
• and
• a correction unit configured to correct the result of the automatic focus detection using the correction value,
• wherein the determination unit determines that it is unnecessary to obtain the color information when an amount of the chromatic aberration in the aberration information is smaller than a predetermined value.

A control method for an image pickup apparatus capable of executing automatic focus detection of an imaging optical system, the control method comprising the steps of:

• acquiring aberration information of the imaging optical system;
• acquiring object information of an object in a focus detecting area;
• determining, based on the aberration information, whether it is necessary to obtain color information of the object;
• calculating, based on the aberration information of the imaging optical system and the object information, a correction value used to correct a difference between a focus state of a captured image and a result of the automatic focus detection, caused by the aberration of the imaging optical system;
• and
• correcting the result of the automatic focus detection using the correction value,
• wherein the determining step determines that it is unnecessary to obtain the color information when an amount of the chromatic aberration in the aberration information is smaller than a predetermined value.

A non-transitory computer-readable storage medium storing a program that enables a computer to execute a method that includes the steps of:

• executing automatic focus detection of an imaging optical system;
• acquiring aberration information of the imaging optical system;
• acquiring object information of an object in a focus detecting area;
• determining, based on the aberration information, whether it is necessary to obtain color information of the object;
• calculating, based on the aberration information of the imaging optical system and the object information, a correction value used to correct a difference between a focus state of a captured image and a result of the automatic focus detection, caused by the aberration of the imaging optical system;
• and
• correcting the result of the automatic focus detection using the correction value,
• wherein the determining step determines that it is unnecessary to obtain the color information when an amount of the chromatic aberration in the aberration information is smaller than a predetermined value.