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US 2002/0154241 A1Published application
Video camera system with interchangeable lens assembly
AssigneeCanon Kabushiki Kaisha
InventorHiroto Ohkawara
Life of this patent
Estimating the term…
Abstract
A video camera system having a camera(128) and an interchangeable lens assembly(127) attachable to and detachable from the camera. A distance measurement frame is set by a distance measurement frame controller(129) on photographer's line-of-sight position information detected by line-of-sight detecting units(135 to 140), and a focal-point evaluation value is extracted by an AF signal processing circuit(113) from an image signal corresponding to the distance measurement frame. The line-of-sight position information, focal-length evaluation value,etc, are transmitted to the lens assembly(127). A zoom lens (102) and focusing lens(105) are controlled by the lens assembly(127).
Claims36
A camera having an interchangeable lens assembly capable of processing an image signal, comprising:
- image sensing means for converting an image of a subject to an image signal and outputting a picture represented by the image signal;
- pointing means for pointing to any position in the picture;
- area setting means for setting a prescribed area at said any position pointed to by said pointing means;
- extracting means for extracting a prescribed signal component from an image signal contained in the first-mentioned image signal and corresponding to the prescribed area set by said area setting means, and generating an evaluation value relating to an imaged state of said picture;
- and
- transmitting means for transmitting information relating to the prescribed area, information representing status of said area setting means and the evaluation value to the lens assembly.
3 more elements
A camera having an interchangeable lens assembly capable of processing an image signal, comprising:
- image sensing means for converting an image of a subject to an image signal and outputting a picture represented by the image signal;
- pointing means for pointing to any position in the picture;
- first area setting means for setting a first focal-point detecting area at said any position pointed to by said pointing means;
- second area setting means for setting a second focal-point detecting area at a prescribed position in said picture;
- selecting means for selecting said first area setting means or said second area setting means;
- extracting means for extracting a prescribed signal component from an image signal contained in the first-mentioned image signal and corresponding to a focal-point detection area set by said first area setting means or second area setting means, whichever has been selected by said selecting means;
- and
- transmitting means for transmitting information relating to the focal-point detection area, information representing status of said first area setting means, the evaluation value and selection information from said selecting means to the lens assembly.
5 more elements
A lens assembly capable of being attached to and detached from a camera, comprising:
- drive means for driving a lens possessed by the lens assembly;
- receiving means for receiving, from the camera, an evaluation value relating to an imaged state of a picture imaged by the camera, information relating to a set area in the picture and information representing operation of the set area;
- and
- control means for controlling said drive means based upon the evaluation value, the information relating to the set area and the information representing the operation of the set area received by said receiving means.
1 more element
An interchangeable lens-type video camera system comprising a camera and an interchangeable lens assembly, said camera including:
- image sensing means for converting an image of a subject to an image signal and outputting a picture represented by the image signal;
- pointing means for pointing to any position in the picture;
- area setting means for setting a prescribed area at said any position pointed to by said pointing means;
- extracting means for extracting a prescribed signal component from an image signal contained in the first-mentioned image signal and corresponding to the prescribed area set by said area setting means, and generating an evaluation value relating to the imaged state of said picture;
- transmitting means for transmitting information relating to the prescribed area, information representing status of said area setting means and the evaluation value to the lens assembly;
- and said lens assembly including:
- receiving means for receiving information related to the prescribed area, information relating to status of said area setting means and the evaluation value from said camera;
- drive means for driving a lens possessed by said lens assembly;
- control means for controlling said drive means based upon the information relating to the prescribed area, the information representing the status of said area setting means and the evaluation value received by said receiving means.
6 more elements
An interchangeable lens-type video camera system comprising a camera and an interchangeable lens assembly, said camera including:
- image sensing means for converting an image of a subject to an image signal and outputting a picture represented by the image signal;
- pointing means for pointing to any position in the picture;
- first area setting means for setting a first focal-point detecting area at said any position pointed to by said pointing means;
- second area setting means for setting a second focal-point detecting area at a prescribed position in said picture;
- selecting means for selecting said first area setting means or said second area setting means;
- extracting means for extracting a prescribed signal component from an image signal contained in the first-mentioned image signal and corresponding to a focal-point detection area set by said first area setting means or second area setting means, whichever has been selected by said selecting means;
- and
- transmitting means for transmitting information relating to the focal-point detection area, information representing status of said first area setting means, the evaluation value and selection information from said selecting means to the lens assembly;
- said lens assembly including:
- receiving means for receiving information relating to the focal-point detection area, information representing status of said first area setting means, the evaluation value and selection information from said camera;
- drive means for driving a lens possessed by said lens assembly;
- and
- control means for controlling said drive means based upon the information relating to the focal-point detection area, information representing status of said first area setting means, the evaluation value and selection information from said camera received by said receiving means.
10 more elements
A camera having an interchangeable lens assembly capable of processing an image signal, comprising:
- image sensing means for converting an image of a subject to an image signal and outputting a picture represented by the image signal;
- pointing means for pointing to any position in the picture;
- and
- transmitting means for transmitting an image signal outputted by said image sensing means and information relating to said any position pointed to by said pointing means to said lens assembly.
1 more element
A camera having an interchangeable lens assembly capable of processing an image signal, comprising:
- image sensing means for converting an image of a subject to an image signal and outputting a picture represented by the image signal;
- pointing means for pointing to any position in the picture;
- selecting means for selecting on/off of operation of said pointing means;
- and
- transmitting means for transmitting, to said lens assembly, an image signal outputted by said image sensing means and information relating to said any position in the picture pointed to by said pointing means when said pointing means is on or information relating to a predetermined prescribed position when said pointing means is off.
2 more elements
A lens assembly capable of being attached to and detached from a camera for converting an image of a subject to an image signal and outputting a picture represented by the image signal, said lens assembly comprising:
- drive means for driving a lens possessed by the lens assembly;
- receiving means for receiving the image signal and information relating to a set area in the picture from said camera;
- area setting means for setting a prescribed area in dependence upon the information relating to the set area received by said receiving means;
- extracting means for extracting a prescribed signal component from an image signal contained in the first-mentioned image signal receiving by said receiving means and corresponding to the prescribed area set by said area setting means, and generating an evaluation value relating to the imaged state of said picture;
- and
- control means for controlling said drive means in dependence upon the evaluation value generated by said extracting means.
3 more elements
An interchangeable lens-type video camera system comprising a camera and an interchangeable lens assembly, said camera including:
- image sensing means for converting an image of a subject to an image signal and outputting a picture represented by the image signal;
- pointing means for pointing to any position in the picture;
- and
- transmitting means for transmitting an image signal outputted by said image sensing means and information relating to said any position pointed to by said pointing means to said lens assembly;
- and
- said lens assembly includes:
- drive means for driving a lens possessed by the lens assembly;
- receiving means for receiving the image signal and information relating to said any position in the picture from said camera;
- area setting means for setting a prescribed area in dependence upon the information relating to said any position received by said receiving means;
- extracting means for extracting a prescribed signal component from an image signal contained in the first-mentioned image signal receiving by said receiving means and corresponding to the prescribed area set by said area setting means, and generating an evaluation value relating to the imaged state of said picture;
- and
- control means for controlling said drive means in dependence upon the evaluation value generated by said extracting means.
9 more elements
An interchangeable lens-type video camera system comprising a camera and an interchangeable lens assembly, said camera including:
- image sensing means for converting an image of a subject to an image signal and outputting a picture represented by the image signal;
- pointing means for pointing to any position in the picture;
- selecting means for selecting on/off of operation of said pointing means;
- and
- transmitting means for transmitting, to said lens assembly, an image signal outputted by said image sensing means and information relating to said any position in the picture pointed to by said pointing means when said pointing means is on or information relating to a predetermined prescribed position when said pointing means is off;
- and
- said lens assembly includes:
- drive means for driving a lens possessed by said lens assembly;
- receiving means for receiving the image signal, the information relating to said any position in the picture or information relating to the prescribed position from said camera;
- area setting means for setting a focal-point detection area in dependence upon the information relating to said any position or information relating to the prescribed position received by said receiving means;
- extracting means for extracting a prescribed signal component from an image signal contained in the first-mentioned image signal receiving by said receiving means and corresponding to the prescribed area set by said area setting means, and generating an evaluation value relating to the imaged state of said picture;
- and
- control means for controlling said drive means in dependence upon the evaluation value generated by said extracting means.
10 more elements
Dependencies are inferred from the claim text.