Image processing apparatus, image processing method, and recording medium
First Claim
1. An image processing apparatus comprising:
- a filter processing unit configured to perform filter processing that emphasizes high-frequency components of an input image;
a value limit calculation unit configured to calculate value limits that define a range of pixel values for converting a gradation of the image using a result of the filter processing;
a limitation unit configured to limit the filter-processed pixel values based on the value limits; and
a conversion unit configured to convert the pixel values so that the image having pixel values limited by the limitation unit is adjusted to a converted gradation of different graduation level than the input image.
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Abstract
An image processing apparatus includes a filter processing unit configured to perform filter processing that emphasizes high-frequency components of an input image, a value limit calculation unit configured to calculate value limits that define a range of pixel values for converting a gradation in the image using a result of the filter processing, a limitation unit configured to limit the filter-processed pixel values based on the value limits, and a conversion unit configured to convert the pixel values so that the image having pixel values limited by the limitation unit is adjusted to a converted gradation of different graduation level than the input image. An image processing method and program are also disclosed.
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Citations
12 Claims
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1. An image processing apparatus comprising:
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a filter processing unit configured to perform filter processing that emphasizes high-frequency components of an input image; a value limit calculation unit configured to calculate value limits that define a range of pixel values for converting a gradation of the image using a result of the filter processing; a limitation unit configured to limit the filter-processed pixel values based on the value limits; and a conversion unit configured to convert the pixel values so that the image having pixel values limited by the limitation unit is adjusted to a converted gradation of different graduation level than the input image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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performing filter processing that emphasizes high-frequency components of an input image; calculating value limits that define a range of pixel values for converting a gradation of the image using a result of the filter processing; limiting the filter-processed pixel values based on the value limits; and converting the pixel values so that the image having limited pixel values is adjusted to a converted gradation of different graduation level than the input image. - View Dependent Claims (12)
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Specification