Image processing apparatus, imaging apparatus, image processing method, storage medium, and lens apparatus
AssigneeCanon Kabushiki Kaisha
InventorTakashi Oniki
Life of this patent
Estimating the term…
Abstract
An image processing apparatus includes an acquirer configured to acquire a captured image generated through imaging by an optical system, a reconstruction processor configured to reconstruct a discretized point spread function of the optical system using coefficient data used to approximate the point spread function, and a sharpening processor configured to perform unsharp mask processing for the captured image based on information on the reconstructed point spread function. A discretization interval of the reconstructed point spread function is different from a pixel pitch in an image sensor used for the imaging.
Claims15
An image processing apparatus comprising:
- an acquirer configured to acquire a captured image generated through imaging by an optical system;
- a reconstruction processor configured to reconstruct a discretized point spread function of the optical system using coefficient data used to approximate a point spread function;
- and
- a sharpening processor configured to perform unsharp mask processing for the captured image based on information on the reconstructed point spread function,
- wherein a discretization interval of the reconstructed point spread function is different from a pixel pitch in an image sensor used for the imaging.
An image processing method comprising the steps of:
- acquiring a captured image generated through imaging by an optical system;
- reconstructing a discretized point spread function of the optical system using coefficient data used to approximate a point spread function;
- and
- performing unsharp mask processing for the captured image based on information on the reconstructed point spread function,
- wherein a discretization interval of the reconstructed point spread function is different from a pixel pitch in an image sensor used for the imaging.
A non-transitory computer readable storage medium for storing a computer program that enables a computer to execute an image processing method,
- wherein an image processing method includes the steps of:
- acquiring a captured image generated through imaging by an optical system;
- reconstructing a discretized point spread function of the optical system using coefficient data used to approximate a point spread function;
- and
- performing unsharp mask processing for the captured image based on information on the reconstructed point spread function,
- wherein a discretization interval of the reconstructed point spread function is different from a pixel pitch in an image sensor used for the imaging.
A lens apparatus attachable to an imaging apparatus having an image sensor and configured to communicate with the imaging apparatus, the lens apparatus comprising:
- an optical system;
- and
- a memory configured to store coefficient data used to approximate a point spread function of the optical system and a discretization coefficient used to adjust a discretization interval in reconstructing a point spread function so that the discretization interval is different from a pixel pitch in the image sensor,
- wherein the imaging apparatus reconstructs the discretized point spread function using the coefficient data and the discretization coefficient transmitted from the lens apparatus, and performs unsharp mask processing for a captured image generated through imaging by the optical system based on information on the reconstructed point spread function.
Dependencies are inferred from the claim text.