Representation of depth of field in camera
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsMasato Yamamoto, Toshimasa Yamanaka, Masahiro Nakajima, Yutaka Ohsawa
Life of this patent
Estimating the term…
Abstract
In representing a depth of field in a camera, the depth of field is displayed on the basis of the magnitude of a field depth feeling Df which corresponds to human feeling. The field depth feeling Df is obtained by proccesing at least one of a depth of field on calculation, an object distance, a lens hypen-focal length, a diameter of permissible circle of confusion, a lens aperture value and a lens focal length.
Claims38
A method of representing a depth of field in a camera, wherein a field depth factor Df is obtained;
- said method of representing comprising the steps of processing a calculated depth of field with respect to a predetermined set of photographic parameters, modifying said calculated depth of field, for said predetermined set of photographic parameters, in accordance with at least one of an object distance, a lens hyper-focal length, a diameter of a permissible circle of confusion, a lens aperture value and a lens focal length, to obtain said field depth factor Df for said predetermined set of photographic parameters, and displaying depth of field on the basis of the magnitude of the field depth factor Df that has been obtained.
A device for representing a depth of field in a camera which comprises:
- calculating means for calculating a field depth factor Df with respect to a predetermined set of photographic parameters, said field depth factor being obtained by processing a calculated depth of field, and modifying said calculated depth of field, for said predetermined set of photographic parameters, in accordance with at least one of an object distance, a lens hyper-focal length, a diameter of a permissible circle of confusion, a lens aperture value and a lens focal length;
- and
- display means for displaying depth of field on a basis of a magnitude of the obtained field depth factor Df.
A method of representing depth of field in a camera comprising the steps of obtaining the field depth factor with respect to a predetermined set of photographic parameters, by processing a calculated depth of field with respect to said set of predetermined photographic parameters, and modifying said calculated depth of field, for said predetermined set of photographic parameters, in accordance with at least one of an object distance, a lens hyper-focal length, a diameter of a permissible circle of confusion, a lens aperture value and a lens focal length, such that the field depth factor bears a predetermined relation to the calculated depth of field;
- and displaying the depth of field corresponding to the magnitude of the obtained field depth factor.
Apparatus for representing depth of field in a camera, said apparatus comprising:
- calculating means for calculating a field depth factor, with respect to a predetermined set of photographic parameters, said field depth factor obtained by processing, via said calculating means, a calculated depth of field for said predetermined set of photographic parameters, and modifying said calculated depth of field, for said predetermined set of photographic parameters, in accordance with at least one of an object distance, a lens hyper-focal length, a diameter of a permissible circle of confusion, a lens aperture value, and a lens focal length, said field depth factor having a predetermined relation to said calculated depth of field;
- and
- display means for displaying the depth of field corresponding to the magnitude of the obtained field depth factor.
A method of representing depth of field in a camera, wherein a field depth factor comprises an indication corresponding to the actual finished condition of a picture, if a picture is taken under a predetermined set of photographic parameters, and wherein the field depth factor is obtained by the steps of processing a calculated depth of field for said predetermined set of photographic parameters, modifying said calculated depth of field, for said predetermined set of photographic parameters, in accordance with at least one of a plurality of parameters influencing depth of field, and displaying an indication of the depth of field corresponding to the magnitude of the field depth factor obtained.
Apparatus for representing depth of field in a camera, said apparatus comprising:
- means for calculating a field depth factor by processing a calculated depth of field, with respect to a predetermined set of photographic parameters and modifying said calculated depth of field for said predetermined set of photographic parameters, in accordance with at least one of a plurality of parameters influencing depth of field, said field depth factor having a predetermined relation to said calculated depth of field and comprising an indication corresponding to an actual finished condition of a picture, if the picture were taken under said predetermined set of photographic parameters and
- means for displaying a depth of field corresponding to a magnitude of said field depth factor.
A device for representing a depth of field in a camera which comprises:
- calculation means for calculating a field depth factor Df with respect to a predetermined set of photographic parameters, said field depth factor being obtained by processing a value substantially equivalent to a calculated depth of field for said predetermined set of photographic parameters, and modifying said calculated value for said predetermined set of photographic parameters in accordance with at least one of an object distance, a lens hyper-focal length, a diameter of a permissible circle of confusion, a lens aperture value and a lens focal length;
- and
- display means for displaying depth of field on a basis of a magnitude of the field depth factor Df.
Apparatus for representing depth of field in a camera, said apparatus comprising:
- calculating means for calculating a field depth factor, said field depth factor obtained by processing, with respect to a predetermined set of photographic parameters, via said calculating means, a calculated depth of field, and modifying said calculated depth of field, at said predetermined set of photographic parameters, in accordance with at least one of an object distance, a lens hyper-focal length, a diameter of a permissible circle of confusion, a lens aperture value and a lens focal length, said field depth factor being different from said calculated depth of field while having a predetermined relation to said calculated depth of field;
- and
- display means for displaying depth of field corresponding to the magnitude of the obtained field depth factor.
Dependencies are inferred from the claim text.