Digital camera
First Claim
1. A digital camera comprising:
- an image-capturing unit that receives light transmitted through a photographic optical system and outputs image signals;
a lens drive unit that moves a focus lens constituting the photographic optical system along an optical axis;
an evaluation value calculation unit that calculates a focal point evaluation value that changes in correspondence to a position assumed by the focus lens based upon the image signals;
a focal adjustment unit that executes an AF search by repeatedly engaging the image-capturing unit and the evaluation value calculation unit in operation as the focus lens is made to move along the optical axis by the lens drive unit, detecting a focus match position based upon resulting focal point evaluation values and driving the focus lens to the focus match position;
a face recognition unit that recognizes a face of a person in an image by analyzing the image signals;
a distance calculation unit that determines an approximate distance to the face based upon the size of the recognized face; and
a lens position determining unit that determines a focus lens position to be set as a start point of the AF search by the focal adjustment unit based upon the approximate distance to the face having been determined by the distance calculation unit.
1 Assignment
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Accused Products
Abstract
A digital camera includes: an image-capturing unit that receives light transmitted through a photographic optical system and outputs image signals; a lens drive unit that moves a focus lens constituting the photographic optical system along an optical axis; an evaluation value calculation unit that calculates a focal point evaluation value that changes in correspondence to a position assumed by the focus lens based upon the image signals; a focal adjustment unit that executes an AF search by repeatedly engaging the image-capturing unit and the evaluation value calculation unit in operation as the focus lens is made to move along the optical axis by the lens drive unit, detecting a focus match position based upon resulting focal point evaluation values and driving the focus lens to the focus match position; a face recognition unit that recognizes a face of a person in an image by analyzing the image signals; a distance calculation unit that determines an approximate distance to the face based upon the size of the recognized face; and a lens position determining unit that determines a focus lens position to be set as a start point of the AF search by the focal adjustment unit based upon the approximate distance to the face having been determined by the distance calculation unit.
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Citations
13 Claims
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1. A digital camera comprising:
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an image-capturing unit that receives light transmitted through a photographic optical system and outputs image signals;
a lens drive unit that moves a focus lens constituting the photographic optical system along an optical axis;
an evaluation value calculation unit that calculates a focal point evaluation value that changes in correspondence to a position assumed by the focus lens based upon the image signals;
a focal adjustment unit that executes an AF search by repeatedly engaging the image-capturing unit and the evaluation value calculation unit in operation as the focus lens is made to move along the optical axis by the lens drive unit, detecting a focus match position based upon resulting focal point evaluation values and driving the focus lens to the focus match position;
a face recognition unit that recognizes a face of a person in an image by analyzing the image signals;
a distance calculation unit that determines an approximate distance to the face based upon the size of the recognized face; and
a lens position determining unit that determines a focus lens position to be set as a start point of the AF search by the focal adjustment unit based upon the approximate distance to the face having been determined by the distance calculation unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification