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US 6,184,925 B2Granted
Lens having color correction data
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsNobuaki Abe, Sachio Hasushita
Life of this patent
Estimating the term…
Abstract
A lens having color correction data includes a memory in which the color correction data necessary to make the color of an image of an object to be recorded, formed by the lens, coincident with the color of the object perceived through the naked eye is stored.
Claims12
A digital camera having a camera body and a photographing lens detachably attached to said camera body,
- said photographing lens comprising:
- a memory medium that stores lens-characteristic color correction data characteristic of the photographing lens necessary to make the color of a lens-formed image of an object to be recorded, formed by the photographing lens, coincident with the color of the object as perceived by a naked human eye,
- and said camera body comprising:
- an image pickup device for converting the lens-formed image formed by said photographing lens to digital image data;
- an image pickup color component data memory including pick-up characteristic color component data characteristic of the image pickup device,
- a recording device for recording the digital image data on a recording medium;
- and
- a controller which writes the lens-characteristic color correction data characteristic of the photographing lens read from the memory medium of said photographing lens to said recording medium, together with said digital image data,
- said memory medium in said lens and said lens-characteristic color correction data therein being physically separate from said image pickup color component data memory in said camera body and said pick-up characteristic color component data therein.
6 more elements
A digital camera having a camera body and a photographing lens detachably attached to said camera body, in which
- the photographing lens comprises a lens-characteristic memory medium that stores lens-characteristic color correction data characteristic of the lens, necessary to make the color of a lens-formed image coincident with the color of the same image as perceived by a naked human eye, and an input/output interface for communicating with the camera body;
- and
- the camera body comprises an input/output interface for communicating with the photographing lens;
- an image pickup device for converting the lens-formed image formed by said photographing lens to digital image data;
- a pickup-characteristic memory medium that stores pickup-characteristic color correction data characteristic of the image pickup device, necessary to make the color of the digital image data coincident with the color of the same image as perceived by a naked human eye, a generating circuit for converting the color correction data of both said lens-characteristic memory medium and of said pickup-characteristic memory medium, and a controller which corrects said digital image data based on the converted color correction data of both said lens-characteristic memory medium and of said pickup-characteristic memory medium,
- said memory medium in said lens and said lens-characteristic color correction data therein being physically separate from said pickup-characteristic memory medium in said camera body and said pick-up characteristic color correction data therein.
3 more elements
Dependencies are inferred from the claim text.