Image correction according to transmission characteristics of image sensing optical system
First Claim
1. An image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing apparatus comprising:
- a storage unit adapted to store relative positional information of an optical axis of said optical system and a reference point of an effective range of said image sensing element and a function representing transmission characteristics of said optical system in advance;
a correction value calculation unit adapted to calculate a correction value for correcting an image sensed by said image sensing unit using the relative positional information and the function; and
an image correction unit adapted to correct the sensed image based upon the correction value.
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Abstract
In an image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by the optical system into an electric signal, a group of correction data, which is calculated on the basis of relative positional information of an optical axis of the optical system and a center of an effective range of the image sensing element, for correcting an image sensed by the image sensing unit is read out from a storage unit, and the image is corrected based upon the group of correction data read out from the storage unit. A minimum value of the group of correction data is associated with a position substantially coinciding with the optical axis position on the image sensing element or a position between the optical axis of the optical system and the center and closer to the optical axis.
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Citations
31 Claims
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1. An image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing apparatus comprising:
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a storage unit adapted to store relative positional information of an optical axis of said optical system and a reference point of an effective range of said image sensing element and a function representing transmission characteristics of said optical system in advance;
a correction value calculation unit adapted to calculate a correction value for correcting an image sensed by said image sensing unit using the relative positional information and the function; and
an image correction unit adapted to correct the sensed image based upon the correction value. - View Dependent Claims (2, 3, 4, 5, 13)
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6. An image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing apparatus comprising:
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a storage unit adapted to store in advance a group of correction data, which is calculated on the basis of relative positional information of an optical axis of said optical system and a reference point of an effective range of said image sensing element, for correcting an image sensed by said image sensing unit; and
an image correction unit adapted to correct the sensed image based upon the group of correction data. - View Dependent Claims (7, 8, 9, 10, 11, 12, 14)
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15. An image processing method for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing method comprising:
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reading relative positional information of an optical axis of said optical system and a reference point of an effective range of said image sensing element and a function representing transmission characteristics of said optical system from a storage unit;
calculating a correction value for correcting an image sensed by said image sensing unit using the read relative positional information and the function; and
correcting the image sensed by said image sensing unit based upon the correction value. - View Dependent Claims (19)
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16. An image processing method for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing method comprising:
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reading out a group of correction data, which is calculated on the basis of relative positional information of an optical axis of said optical system and a reference point of an effective range of said image sensing element, for correcting an image sensed by said image sensing unit from a storage unit; and
correcting the image based upon the group of correction data read out from said storage unit. - View Dependent Claims (17, 18, 20)
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21. An image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing apparatus comprising:
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an acquisition unit adapted to acquire positional deviation information in a manufacturing process between said optical system and said image sensing element;
a storage unit adapted to store image correction values in advance; and
an image correction unit adapted to correct the image based upon said positional deviation information in a manufacturing process and said image correction value. - View Dependent Claims (22, 23)
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24. An image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing apparatus comprising:
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a storage unit adapted to store correction values for correcting an image sensed by said image sensing unit calculated on the basis of positional deviation information in a manufacturing process between said optical system and said image sensing element; and
an image correction unit adapted to correct the sensed image based upon the correction values. - View Dependent Claims (25)
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26. An image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing apparatus comprising:
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a storage unit adapted to store a plurality of different correction values, corresponding to light amount of a subject, for correcting an image sensed by said image sensing unit on the basis of positional deviation information in a manufacturing process between said optical system and said image sensing element, wherein a position corresponding to a minimum value of the correction values in an effective range of said image sensing element is off the center of the effective range.
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27. An image processing apparatus for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing apparatus comprising:
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a storage unit adapted to store a first group of correction data for correcting an image sensed by said image sensing unit on the basis of positional deviation information in a manufacturing process between said optical system and said image sensing element; and
a calculation unit adapted to calculate a plurality of second groups of correction data corresponding to a light amount of a object at a time of image sensing operation using said first group of correction data, wherein a position corresponding to a minimum value of said first group of correction data in an effective range of said image sensing element is off the center of the effective range.
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28. An image processing method for processing an image sensed by an image sensing unit which includes an optical system and an image sensing element for converting a subject image formed by said optical system into an electric signal, the image processing method comprising:
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acquiring positional deviation information in a manufacturing process between said optical system and said image sensing element;
storing image correction values in advance; and
correcting the image based upon said positional deviation information in a manufacturing process and said image correction values. - View Dependent Claims (29, 30, 31)
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Specification