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US 5,424,774 AGranted
Image sensing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTsutomu Takayama, Yasuyuki Yamazaki
Life of this patent
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Abstract
An image sensing apparatus includes an image sensing circuit, an inverting circuit for inverting a polarity of an output of the image sensing circuit, and a correcting circuit for correcting a black reference level of the output of the image sensing circuit in accordance with an operation of the inversion circuit.
Claims22
An image sensing apparatus comprising;
- image sensing means;
- clamp means for clamping a predetermined portion of an output of said image sensing means to a predetermined reference level;
- inverting means for selectively inverting a polarity of an output of said clamp means;
- and
- varying means for varying said reference level of said clamp means in accordance with an operation of said inverting means.
2 more elements
An image sensing apparatus comprising:
- color image sensing means for correcting an optical image into an electrical signal and generating a plurality of color signals;
- clamp means for clamping a predetermined portion of an output of said image sensing means to a predetermined reference level;
- inversion processing means for selectively inverting said plurality of color signals;
- and
- level changing means for changing said reference level of said clamp means in accordance with an operation of said inversion processing means.
2 more elements
An image sensing apparatus comprising:
- image sensing means for converting subject light into an electrical signal and outputting a plurality of color signals;
- white balance control means for automatically controlling a white-balance condition of said color signals based on an output of a color temperature detecting means;
- negative/positive inverting means;
- mode selecting means for selecting a negative/positive inversion mode;
- and
- fixing means for fixing the white-balance condition regardless of said white-balance control means when the negative/positive inversion mode is selected.
3 more elements
An image sensing apparatus comprising:
- image sensing means;
- level control means for setting a predetermined portion of an output of said image sensing means to a predetermined reference level;
- inverting means for selectively inverting a polarity of an output of said level control means;
- and
- varying means for varying said reference level of said level control means in accordance with an operation of said inverting means.
2 more elements
Dependencies are inferred from the claim text.