IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD
First Claim
Patent Images
1. An image processing device comprising:
- a vertical step edge area determination unit that determines a vertical step edge area of an image;
a horizontal step edge area determination unit that determines a horizontal step edge area of the image; and
an interpolation unit that performs an interpolation on a the vertical step edge area and the horizontal step edge area,wherein the vertical step edge area determination unit calculates an absolute value of a difference between a vertical interpolation value of a target pixel and a value of a pixel vertically adjacent to the target pixel and determines the vertical step edge area based on a relationship between a maximum value and a minimum value of the absolute value of an upper peripheral pixel with respect to the target pixel and the maximum value and the minimum value of the absolute value of a lower peripheral pixel with respect to the target pixel.
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Abstract
An image processing device and method can perform interpolation that reduces overshoot and ringing on a step edge while maintaining high frequency components. The image processing device includes a vertical step edge area determination unit that determines a vertical step edge area of an image, a horizontal step edge area determination unit that determines a horizontal step edge area of the image, and an interpolation unit that performs an interpolation based on the vertical step edge area and the horizontal step edge area.
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Citations
18 Claims
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1. An image processing device comprising:
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a vertical step edge area determination unit that determines a vertical step edge area of an image; a horizontal step edge area determination unit that determines a horizontal step edge area of the image; and an interpolation unit that performs an interpolation on a the vertical step edge area and the horizontal step edge area, wherein the vertical step edge area determination unit calculates an absolute value of a difference between a vertical interpolation value of a target pixel and a value of a pixel vertically adjacent to the target pixel and determines the vertical step edge area based on a relationship between a maximum value and a minimum value of the absolute value of an upper peripheral pixel with respect to the target pixel and the maximum value and the minimum value of the absolute value of a lower peripheral pixel with respect to the target pixel. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image processing method comprising:
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determining a vertical step edge area of an image; determining a horizontal step edge area of the image; and performing an interpolation based on the vertical step edge area and the horizontal step edge area, wherein determining the vertical step edge area includes calculating an absolute value of a difference between a vertical interpolation value of a target pixel and a value of a pixel vertically adjacent to the target pixel, and determining the vertical step edge area based on a relationship between a maximum value and a minimum value of the absolute value of an upper peripheral pixel with respect to the target pixel and the maximum value and the minimum value of the absolute value of a lower peripheral pixel with respect to the target pixel. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An image processing device comprising:
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a vertical step edge area determination unit that determines a vertical step edge area of an image; a horizontal step edge area determination unit that determines a horizontal step edge area of the image; and an interpolation unit that performs an interpolation on a the vertical step edge area and the horizontal step edge area, wherein the interpolation unit performs a vertical interpolation using a result of a first interpolation in which overshoot and ringing do not occur or a result of a second interpolation different from the first interpolation based on the vertical step edge area, and performs a horizontal interpolation using the result of the first interpolation or the result of the second interpolation based on the horizontal step edge area. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification