Image processing apparatus
First Claim
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1. An image processing apparatus for processing complementary color image data output from an image capturing element including a complementary-color filter, comprising:
- a signal generator for generating a low frequency luminance signal based on a complimentary color image data; and
a middle-high-range luminance component compensation section for compensating for a middle-high-range luminance component representing an intermediate range between a middle range and a high range of a low-frequency luminance signal, generated based on the complementary color image data such that the low-frequency luminance signal has substantially an ideal frequency characteristic which is lower than or equal to a predetermined frequency, wherein the middle-high-range luminance component is combined with a middle-range luminance component and a high-range luminance component.
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Abstract
An image processing apparatus for processing complementary color image data output from an image capturing element including a complementary-color filter is provided. The apparatus comprises 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 complementary color image data such that the low-frequency luminance signal has substantially an ideal frequency characteristic which is lower than or equal to a predetermined frequency.
29 Citations
18 Claims
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1. An image processing apparatus for processing complementary color image data output from an image capturing element including a complementary-color filter, comprising:
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a signal generator for generating a low frequency luminance signal based on a complimentary color image data; and a middle-high-range luminance component compensation section for compensating for a middle-high-range luminance component representing an intermediate range between a middle range and a high range of a low-frequency luminance signal, generated based on the complementary color image data such that the low-frequency luminance signal has substantially an ideal frequency characteristic which is lower than or equal to a predetermined frequency, wherein the middle-high-range luminance component is combined with a middle-range luminance component and a high-range luminance component.
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2. An image processing apparatus for processing complementary color image data output from an image capturing element including a complementary-color filter, comprising:
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a middle-high-range luminance component extraction section for extracting a 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
from a first luminance signal generated based on complementary color image data of four neighboring pixels; anda first synthesis section for adding the middle-high-range luminance component to a low-frequency luminance signal generated based on the complementary color image data to generate a second luminance signal. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification