Focus adjusting device and focus adjusting program with control unit to guide a light image based upon detected distributions
AssigneeNikon Corporation
InventorHayato Hokoi
Life of this patent
Estimating the term…
Abstract
A focus adjusting device which includes an edge detection unit that detects edges of a subject image for each color component forming an image including the subject image; a distribution detection unit that detects distributions of a focalized state and an unfocused state of the image based on the edges detected by the edge detection unit; and a control unit that moves a lens based on the distributions detected by the distribution detection unit, wherein the subject image is incident from an optical system having the lens, the control unit moves the lens, and thus the subject image is focused on.
Claims14
An image forming apparatus comprising a focus adjusting device, the focus adjusting device performing functions of:
- detecting an edge included in a subject from image data generated by an imager that images the subject;
- creating a map showing distributions of a focalized state and an unfocused state based on color component amounts of the detected edge;
- moving a lens, that guides a light image to the imager, toward a direction so as to focus on an imaging surface of the imager based on the created map;
- and
- detecting distributions of a focalized state and an unfocused state based on a ratio of color component amounts of an edge detected by the detecting.
An image forming apparatus comprising a focus adjusting device, the focus adjusting device performing functions of:
- detecting an edge included in a subject from image data generated by an imager that images the subject;
- creating a map showing distributions of a focalized state and an unfocused state based on a line spread function of the detected edge;
- and
- moving a lens, that guides a light image to the imager, toward a direction so as to focus on an imaging surface of the imager based on the created map.
An image forming apparatus comprising a focus adjusting device, the focus adjusting device performing functions of:
- detecting an edge included in a subject from image data generated by an imager that images the subject;
- creating a map showing distributions of a focalized state and an unfocused state based on color component amounts of the detected edge;
- and
- moving a lens, that guides a light image to the imager, toward a direction so as to focus on an imaging surface of the imager based on the created map,
- wherein the map includes an index indicating a direction for moving the lens obtained by the color component amounts of the detected edge and a value relating to a defocus amount obtained by the color component amounts of the detected edge.
Dependencies are inferred from the claim text.