Image sensing apparatus and method of controlling the apparatus
AssigneeCanon Kabushiki Kaisha
InventorKimitaka Arai
Life of this patent
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Abstract
This invention makes it possible to provide a technique for suppressing a decrease in resolution of a sensed image even when an image sensor on which solid-state image sensing elements with different sensitivities are arranged is used. A demosaic unit obtains a color component of a given pixel, sensed at the first sensitivity, by performing interpolation calculation using color components of pixels each of which is adjacent to the given pixel and is sensed at the first sensitivity. The demosaic unit also obtains a color component of a given pixel, sensed at the second sensitivity, by performing interpolation calculation using color components of pixels each of which is adjacent to the given pixel and is sensed at the second sensitivity.
Claims15
An image sensing apparatus including an image sensor on which solid-state image sensing elements which sense color components at a first sensitivity and solid-state image sensing elements which sense color components at a second sensitivity higher than the first sensitivity are alternately, two-dimensionally arranged, comprising:
- a first calculation unit that obtains a color component of a given pixel, sensed at the first sensitivity, by performing interpolation calculation using color components of pixels each of which is adjacent to the given pixel and is sensed at the first sensitivity, in a color image based on an image signal output from the image sensor;
- a second calculation unit that obtains a color component of a given pixel, sensed at the second sensitivity, by performing interpolation calculation using color components of pixels each of which is adjacent to the given pixel and is sensed at the second sensitivity, in the color image output from the image sensor;
- and
- a unit that outputs the color image in which color components of all pixels are determined by said first calculation unit and said second calculation unit.
A method of controlling an image sensing apparatus including an image sensor on which solid-state image sensing elements which sense color components at a first sensitivity and solid-state image sensing elements which sense color components at a second sensitivity higher than the first sensitivity are alternately, two-dimensionally arranged, comprising:
- a first calculation step of obtaining a color component of a given pixel, sensed at the first sensitivity, by performing interpolation calculation using color components of pixels each of which is adjacent to the given pixel and is sensed at the first sensitivity, in a color image based on an image signal output from the image sensor;
- a second calculation step of obtaining a color component of a given pixel, sensed at the second sensitivity, by performing interpolation calculation using color components of pixels each of which is adjacent to the given pixel and is sensed at the second sensitivity, in the color image output from the image sensor;
- and
- a step of outputting the color image in which color components of all pixels are determined in the first calculation step and the second calculation step.
Dependencies are inferred from the claim text.