Focus control device, imaging device, endoscope system, and method for controlling focus control device
AssigneeOlympus Corporation
InventorKoichiro YOSHINO
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Abstract
A focus control device includes a processor including hardware, the processor being configured to implement: an area setting process that sets a plurality of areas, each including a plurality of pixels, on a captured image acquired by an imaging section, an evaluation value calculation process that calculates an AF (Autofocus) evaluation value for each of the plurality of set areas, a bright spot influence rate calculation process that calculates a bright spot influence rate for each of the plurality of set areas, based on whether or not the area includes a high luminance portion determined to have a size equal to or larger than a given size, and focus control based on the AF evaluation value and the bright spot influence rate.
Claims17
A focus control device comprising:
- a processor comprising hardware,
- the processor being configured to implement:
- an area setting process that sets a plurality of areas, each including a plurality of pixels, on a captured image acquired by an imaging section;
- an evaluation value calculation process that calculates an AF (Autofocus) evaluation value for each of the plurality of set areas;
- a bright spot influence rate calculation process that calculates a bright spot influence rate for each of the plurality of set areas, based on whether or not the area includes a high luminance portion determined to have a size equal to or larger than a given size;
- and
- focus control based on the AF evaluation value and the bright spot influence rate.
A focus control device comprising:
- a processor comprising hardware,
- the processor being configured to implement:
- an evaluation value calculation process that calculates an AF (Autofocus) evaluation value based on a captured image acquired by an imaging section;
- and
- focus control based on the AF evaluation value,
- wherein when a high luminance portion is a group of contiguous high luminance pixels, the processor performs the focus control with contribution of the AF evaluation value calculated based on a pixel other than the high luminance pixel to the focus control set to be first contribution, and with the contribution of the AF evaluation value calculated based on the high luminance portion determined to have a size smaller than a given size to the focus control set to be the first contribution.
A method for controlling a focus control device, the method comprising:
- setting a plurality of areas, each including a plurality of pixels, on a captured image acquired by an imaging section;
- calculating an AF (Autofocus) evaluation value for each of the plurality of set areas;
- calculating a bright spot influence rate for each of the plurality of set areas, based on whether or not the area includes a high luminance portion determined to have a size equal to or larger than a given size;
- and
- performing focus control based on the AF evaluation value and the bright spot influence rate.
A method for controlling a focus control device, the method comprising:
- calculating an AF (Autofocus) evaluation value based on a captured image acquired by an imaging section;
- and
- performing focus control based on the AF evaluation value,
- wherein when a high luminance portion is a group of contiguous high luminance pixels, in the focus control based on the AF evaluation value, the focus control is performed with contribution of the AF evaluation value calculated based on a pixel other than the high luminance pixel to the focus control set to be first contribution, and with the contribution of the AF evaluation value calculated based on the high luminance portion determined to have a size smaller than a given size to the focus control set to be the first contribution.
Dependencies are inferred from the claim text.