Image processing method, image processing apparatus, and image pickup apparatus for correcting degradation component of image
AssigneeCanon Kabushiki Kaisha
InventorKoshi Hatakeyama
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Abstract
An image processing method includes the steps of obtaining an image generated by an image pickup system, and performing correction processing for the image by utilizing an image restoration filter generated or selected based on an optical transfer function of the image pickup system. The image restoration filter is a filter configured to reduce a phase degradation component of the image.
Claims10
An image processing method comprising the steps of:
- obtaining an image generated by an image pickup system;
- and
- performing correction processing for the image by performing convolution of an image restoration filter on the image, the image restoration filter being generated or selected based on an optical transfer function of the image pickup system,
- wherein the image restoration filter is configured to reduce, of a phase degradation component and an amplitude degradation component of the image, the phase degradation component, which is an asymmetric image component corresponding to an asymmetric point spread function of the image pickup system, without reducing the amplitude degradation component, the reduction of the phase degradation component increasing symmetry of the phase degradation component.
An image processing apparatus configured to process an image generated by an image pickup system, the image processing apparatus comprising a correction unit configured to perform correction processing for the image by performing convolution of an image restoration filter on the image, the image restoration filter being generated or selected based on an optical transfer function of the image pickup system,
- wherein the image restoration filter is configured to reduce, of a phase degradation component and an amplitude degradation component of the image, the phase degradation component, which is an asymmetric image component corresponding to an asymmetric point spread function of the image pickup system, without reducing the amplitude degradation component, the reduction of the phase degradation component increasing symmetry of the phase degradation component.
An image pickup apparatus comprising:
- an image pickup system configured to generate an image through a photoelectric conversion of an object image formed by an image pickup optical system;
- and
- an image processing apparatus configured to process an image generated by an image pickup system, the image processing apparatus comprising a correction unit configured to perform correction processing for the image by performing convolution of an image restoration filter on the image, the image restoration filter being generated or selected based on an optical transfer function of the image pickup system,
- wherein the image restoration filter is configured to reduce, of a phase degradation component and an amplitude degradation component of the image, the phase degradation component, which is an asymmetric image component corresponding to an asymmetric point spread function of the image pickup system, without reducing the amplitude degradation component, the reduction of the phase degradation component increasing symmetry of the phase degradation component.
A non-transitory recording medium that stores an image processing program that enable a computer to execute an image processing method,
- wherein the image processing method includes the steps of:
- obtaining an image generated by an image pickup system;
- and
- performing correction processing for the image by performing convolution of utilizing an image restoration filter on the image, the image restoration filter being generated or selected based on an optical transfer function of the image pickup system,
- wherein the image restoration filter is configured to reduce, of a phase degradation component and an amplitude degradation component of the image, the phase degradation component, which is an asymmetric image component corresponding to an asymmetric point spread function of the image pickup system, without reducing the amplitude degradation component, the reduction of the phase degradation component increasing symmetry of the phase degradation component.
Dependencies are inferred from the claim text.