Image processing method, imaging apparatus using the same, image processing apparatus, 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 according to an image height.
Claims15
An image processing apparatus comprising:
- at least one memory storing instructions;
- and
- at least one processor that implements the stored instructions to execute a plurality of tasks, including:
- an acquiring task that acquires a captured image generated through imaging using an optical system;
- a reconstruction task that reconstructs a discretized point spread function of the optical system using coefficient data used to approximate the point spread function;
- and
- a sharpening task that performs an 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 according to an image height.
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 the 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 according to an image height.
A non-transitory computer readable storage medium storing a computer program executable by a computer to execute an image processing method comprising the steps of:
- acquiring a captured image generated through imaging using an optical system;
- reconstructing a discretized point spread function of the optical system using coefficient data used to approximate the 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 according to an image height.
A lens apparatus attachable to an imaging apparatus having including an image sensor and configured to communicate with the imaging apparatus, the lens apparatus comprising:
- an optical system;
- and
- a memory storing 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 the point spread function so that the discretization interval is different according to an image height,
- 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.