Image processing apparatus and image processing method with deconvolution processing for image blur correction
View Patent ↗An image processing method includes a restore step of performing blur restoration for image data, an acquisition step of acquiring image-related information stored together with the image data, and an extraction step of extracting the range of object distances at which the blur restoration is performed, based on the image-related information. In the restore step, blur restoration is performed for the image data in the range of object distances extracted in the extraction step.
1. An image processing apparatus comprising:
a restore unit which performs blur restoration for image data obtained by an image capture unit which photo-electrically converts light from an object which has entered through an imaging lens;
and
a setting unit which sets a range of an object distance at which the blur restoration is performed, based on information associated with the imaging lens and an object distance of an object in the image data;
wherein said restore unit performs deconvolution processing as blur restoration for the image data in the range of object distance.
2. The apparatus according to claim 1 , further comprising a display control unit which performs control to display the image data having undergone blur restoration by said restore unit on a display unit.
3. The apparatus according to claim 1 , wherein the setting unit sets the range of an object distance based on information includes at least one of information associated with focus detection operation before image capture, object movement information, and precision information of focus detection operation.
4. The apparatus according to claim 1 , wherein said restore unit performs blur restoration by restoration processing based on an optical transfer characteristic between the imaging lens and said image capture unit.
5. The apparatus according to claim 1 , further comprising a focus detection unit which acquires information associated with an object distance,
wherein is information associated with focus detection operation of said focus detection unit before image capture.
6. The apparatus according to claim 1 , further comprising a display unit which displays the image obtained by said image capture unit,
wherein the setting unit sets the range of an object distance based on information indicating a display state of an image displayed by said display unit.
7. The apparatus according to claim 1 , wherein the setting unit sets the range of an object distance within distances that allow blur restoration.
8. The apparatus according to claim 1 , wherein the setting unit sets the range of an object distance so as to include an object having a range exhibiting the smallest out-of-focus amount.
9. An image processing method comprising the steps of:
performing blur restoration for image data obtained by an image capture unit which photo-electrically converts light from an object which has entered through an imaging lens;
and
setting a range of object distance at which the blur restoration is performed, based on information associated with the imaging lens and an object distance of an object in the image data
wherein in the step of restoring, deconvolution processing is performed as blur restoration for the image data in the range of an object distance.