Image processing apparatus and image capture apparatus
First Claim
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1. An image processing apparatus for processing an image signal, comprising:
- integration means for acquiring the image signal during each detection period having a length equal to or longer than one cycle of flicker occurring on an image under illumination of a fluorescent lamp, and for integrating the acquired image signal in a unit of time equal to one horizontal synchronization period or longer; and
flicker detection means for estimating a flicker component on the basis of a frequency analysis result obtained in the unit of each detection period by using an integral result obtained by the integration means.
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Abstract
An image processing apparatus for processing an image signal includes an integrator configured to acquire the image signal during each detection period having a length equal to or longer than one cycle of flicker occurring on an image under illumination of a fluorescent lamp, and to integrate the acquired image signal in a unit of time equal to one horizontal synchronization period or longer; and a flicker detector configured to estimate a flicker component on the basis of a frequency analysis result obtained in the unit of each detection period by using an integral result obtained by the integrator.
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Citations
14 Claims
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1. An image processing apparatus for processing an image signal, comprising:
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integration means for acquiring the image signal during each detection period having a length equal to or longer than one cycle of flicker occurring on an image under illumination of a fluorescent lamp, and for integrating the acquired image signal in a unit of time equal to one horizontal synchronization period or longer; and
flicker detection means for estimating a flicker component on the basis of a frequency analysis result obtained in the unit of each detection period by using an integral result obtained by the integration means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An image capture apparatus for capturing an image by using an XY address type of solid-state image capture device, comprising:
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integration means for acquiring an image signal obtained by image capture, during each detection period having a length equal to or longer than one cycle of flicker occurring on an image under illumination of a fluorescent lamp, and for integrating the acquired image signal in a unit of time equal to one horizontal synchronization period or longer; and
flicker detection means for estimating a flicker component on the basis of a frequency analysis result obtained in the unit of each detection period by using an integral result obtained by the integration means.
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13. An image processing method for detecting flicker occurring on an image under illumination of a fluorescent lamp, comprising:
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acquiring an image signal during each detection period having a length equal to or longer than one cycle of the flicker;
integrating the acquired image signal in a unit of time equal to one horizontal synchronization period or longer; and
estimating a flicker component on the basis of a frequency analysis result obtained in the unit of each detection period by using an integral result obtained by the integrating step.
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14. An image processing apparatus for processing an image signal, comprising:
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an integrator configured to acquire the image signal during each detection period having a length equal to or longer than one cycle of flicker occurring on an image under illumination of a fluorescent lamp, and to integrate the acquired image signal in a unit of time equal to one horizontal synchronization period or longer; and
a flicker detector configured to estimate a flicker component on the basis of a frequency analysis result obtained in the unit of each detection period by using an integral result obtained by the integrator.
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Specification