Image processing apparatus, image processing method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorRitsuko Otake
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Abstract
In one or more embodiments, an image processing apparatus obtains a shade image representing shade components included in a multi-valued image obtained by capturing an image of a document. The shade components depend on an image capture environment. The apparatus binarizes a pixel value of a target pixel in the multi-valued image based on a pixel value of a corresponding pixel in the shade image at coordinates identical to those of the target pixel to generate a pixel value representing white or black. One or more image processing methods and storage mediums are also provided herein.
Claims11
An image processing apparatus comprising:
- an obtaining unit configured to obtain a shade image representing shade components included in a multi-valued image obtained by capturing an image of a document, the shade components depending on an image capture environment;
- and
- a generating unit configured to binarize a pixel value of a target pixel in the multi-valued image based on a pixel value of a corresponding pixel in the shade image at coordinates identical to those of the target pixel to generate a pixel value representing white or black.
An image processing method comprising:
- obtaining a shade image representing shade components included in a multi-valued image obtained by capturing an image of a document, the shade components depending on an image capture environment;
- and
- binarizing a pixel value of a target pixel in the multi-valued image based on a pixel value of a corresponding pixel in the shade image at coordinates identical to those of the target pixel to generate a pixel value representing white or black.
A non-transitory computer readable storage medium storing a program for causing a computer to perform an image processing method, the image processing method comprising:
- obtaining a shade image representing shade components included in a multi-valued image obtained by capturing an image of a document, the shade components depending on an image capture environment;
- and
- binarizing a pixel value of a target pixel in the multi-valued image based on a pixel value of a corresponding pixel in the shade image at coordinates identical to those of the target pixel to generate a pixel value representing white or black.
Dependencies are inferred from the claim text.