Image processing apparatus and image processing method
AssigneeCanon Kabushiki Kaisha
InventorHirokazu Tamura
Life of this patent
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Abstract
Edge enhancement processing is executed by obtaining a sum of whiteness degrees around a target pixel, to which edge enhancement is to be applied, and by adjusting the amount of edge enhancement such that the degree of edge enhancement decreases as the sum of whiteness degrees increases, and the degree of edge enhancement increases as the sum of whiteness degrees decreases. A whiteness degree is a value indicating the extent to which a pixel is close to white, and a sum of whiteness degrees indicates the extent to which the color around the target pixel is whitish.
Claims14
An image processing apparatus with a function of applying edge enhancement to input image data, comprising:
- a unit that obtains whiteness degrees around a target pixel;
- a determination unit that determines a correction value for the edge enhancement in accordance with the whiteness degrees;
- and
- a unit that applies edge enhancement processing to the target pixel at intensity corresponding to the correction value.
An image processing method with a function of applying edge enhancement to input image data, comprising:
- obtaining whiteness degrees around a target pixel;
- determining a correction value for the edge enhancement in accordance with the whiteness degrees;
- and
- applying edge enhancement processing to the target pixel at intensity corresponding to the correction value.
A non-transitory computer-readable medium storing a program for causing a computer to execute an image processing method for applying edge enhancement to input image data, the method comprising:
- obtaining whiteness degrees around a target pixel;
- determining a correction value for the edge enhancement in accordance with the whiteness degrees;
- and
- applying edge enhancement processing to the target pixel at intensity corresponding to the correction value.
Dependencies are inferred from the claim text.