Image capturing apparatus and control method thereof
AssigneeCanon Kabushiki Kaisha
InventorsHideki Ikedo, Ken Sasaki
Life of this patent
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Abstract
An image capturing apparatus comprises a plurality of light-receiving circuits, each outputting a pulse signal in response to a photon being incident; a plurality of counter circuits that count the respective pulse signals output by the plurality of light-receiving circuits; and a correction circuit that corrects counts from the plurality of counter circuits and outputs the corrected counts as image data. The correction circuit calculates a correction coefficient on the basis of counts obtained by the plurality of counter circuits in a state where pulse widths of the pulse signals differ or under conditions where generation frequencies of the pulse signals differ, and performs the correction using the correction coefficient.
Claims15
An image capturing apparatus, comprising:
- a plurality of light-receiving circuits, each outputting a pulse signal in response to a photon being incident;
- a plurality of counter circuits that count the respective pulse signals output by the plurality of light-receiving circuits;
- and
- a correction circuit that corrects counts from the plurality of counter circuits and outputs the corrected counts as image data,
- wherein the correction circuit calculates a correction coefficient on the basis of counts obtained by the plurality of counter circuits in a state where pulse widths of the pulse signals differ or under conditions where generation frequencies of the pulse signals differ, and performs the correction using the correction coefficient.
A method of controlling an image capturing apparatus, the apparatus comprising a plurality of light-receiving circuits that each outputs a pulse signal in response to a photon being incident and a plurality of counter circuits that count the respective pulse signals output by the plurality of light-receiving circuits, and the method comprising:
- correcting counts from the plurality of counter circuits;
- and
- outputting the corrected counts as image data,
- wherein the correcting calculates a correction coefficient on the basis of the counts obtained by the plurality of counter circuits in a state where pulse widths of the pulse signals differ or under conditions where generation frequencies of the pulse signals differ, and
- the correcting is performed using the correction coefficient.
A non-transitory computer-readable medium in which is stored a program for causing a computer of an image capturing apparatus, the apparatus including a plurality of light-receiving circuits that each outputs a pulse signal in response to a photon being incident and a plurality of counter circuits that count the respective pulse signals output by the plurality of light-receiving circuits, to execute a method of controlling the image capturing apparatus, wherein the method comprising:
- correcting counts from the plurality of counter circuits;
- and
- outputting the corrected counts as image data,
- wherein the correcting calculates a correction coefficient on the basis of the counts obtained by the plurality of counter circuits in a state where pulse widths of the pulse signals differ or under conditions where generation frequencies of the pulse signals differ, and
- the correcting is performed using the correction coefficient.
Dependencies are inferred from the claim text.