Image processing apparatus
AssigneeSharp Kabushiki Kaisha
InventorXiaomang Zhang
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Abstract
An image processing apparatus for processing RGB image data output from an image capturing element including a primary-color filter, includes: a middle-high range luminance component compensation section for compensating for a middle-high range luminance component of a low-frequency luminance signal generated based on the RGB image data such that the low-frequency luminance signal has substantially an ideal frequency luminance characteristic which is lower than or equal to a predetermined frequency.
Claims20
An image processing apparatus for processing RGB image data output from an image capturing element including a primary-color filter, comprising:
- a low frequency luminance signal generator generating a low frequency luminance signal based on the RGB image data;
- and
- a middle-high range luminance component compensation section for compensating for a middle-high range luminance component of the low-frequency luminance signal such that the low-frequency luminance signal has substantially an ideal frequency luminance characteristic which is lower than or equal to a predetermined frequency.
An image processing apparatus for processing RGB image data output from an image capturing element including a primary-color filter, comprising:
- a low frequency luminance signal generator generating a low frequency luminance signal based on the RGB image data;
- a middle-high range luminance component compensation section for compensating for a middle-high range luminance component of the low-frequency luminance signal, said middle-high range luminance component compensation section including a middle-high range luminance component extracting section for extracting a middle-high range luminance component from the RGB image data, the extracted middle-high range luminance component having a zero amplitude at an angular frequency ω=π and a maximum amplitude at an angular frequency ω between π/2 and π, and
- a synthesis section for adding the extracted middle-high range luminance component to the low frequency luminance signal.
A method of processing RGB image data output from an image capturing element including a primary-color filter comprising the steps of:
- generating a first luminance signal from the RGB image data;
- generating a second luminance signal having a middle-high range luminance component from the RGB image data;
- and
- correcting the second luminance signal by extracting a middle-high range luminance component from the first luminance signal and adding the extracted middle-high range luminance component to the second luminance signal.
Dependencies are inferred from the claim text.