Image processing apparatus and method configured to calculate defocus amount of designated area
AssigneeCanon Kabushiki Kaisha
InventorHideya Takanashi
Life of this patent
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Abstract
An image processing apparatus includes a focus detector configured to detect a focus state of a focus detection area by detecting a shift amount between a pair of image signals of an object image, a memory configured to store an image photoelectrically converted and output from an image pickup device, the focus detection area, and the image signals, a setting unit configured to set a designated area in the image stored in the memory, a calculating unit configured to calculate a defocus amount of the designated area using the pair of image signals corresponding to the designated area among the image signals stored by the memory, and a display unit configured to display the defocus amount of the designated area.
Claims14
An image processing apparatus comprising:
- an image pickup device configured to photoelectrically convert an object image;
- a focus detector configured to detect a focus state of a focus detection area by detecting a phase difference between a pair of image signals of the object image;
- a controller configured to record in a memory an image generated from output of the image pickup device that is processed for recording, and information on pairs of image signals for focus detection corresponding to the recorded image;
- and
- a setting unit configured to set a designated area designated by a user in the image recorded in the memory and reproduced;
- wherein the controller calculates a defocus amount of the designated area using information on a pair of image signals corresponding to the designated area among the information on pairs of image signals recorded in the memory, and displays information related to the defocus amount of the designated area.
An image processing method of an image processing apparatus having an image pickup device configured to photoelectrically convert an object image, comprising:
- detecting a focus state of a focus detection area by detecting a phase difference between a pair of image signals of the object image;
- recording in a memory an image generated from output of the image pickup device that is processed for recording, and information on pairs of image signals for focus detection corresponding to the recorded image;
- detecting a designated area designated by a user in the image recorded in the memory and reproduced;
- calculating a defocus amount of the designated area using information on a pair of image signals corresponding to the designated area among the information on pairs of image signals recorded in the memory;
- and
- displaying information related to the defocus amount of the designated area.
A non-transitory computer-readable storage medium storing a program that enables a processor to execute an image processing method of an image processing apparatus having an image pickup device configured to photoelectrically convert an object image, comprising:
- detecting a focus state of a focus detection area by detecting a phase difference between a pair of image signals of the object image;
- recording in a memory an image generated from output of the image pickup device that is processed for recording, and information on pairs of image signals for focus detection corresponding to the recorded image;
- detecting a designated area designated by a user in the image recorded in the memory and reproduced;
- calculating a defocus amount of the designated area using information on a pair of image signals corresponding to the designated area among the information on pairs of image signals recorded in the memory;
- and
- displaying information related to the defocus amount of the designated area.
Dependencies are inferred from the claim text.