US 8,427,560 B2 · Image processing device

Abstract

An image capturing element of an image capturing section 2 has a color filter with a Bayer matrix, and interpolation unit 6 implements an interpolation process to an image signal for each pixel received from the image capturing element by using image signals of adjacent pixels to obtain an image signal of R, G and B for the respective pixels. High-frequency component extracting unit 7 extracts a high frequency component from the G signal; false-color reduced color signal generation unit 8 obtains, for the respective pixels, a false-color reduced color signal (R+B−2G) in which an effect of a false color is reduced; and, chroma signal generation unit 9 generates a chroma signal, which is an absolute value of the false-color reduced color signal. Suppression unit 10 suppresses the false color on the basis of the high frequency component extracted by the high-frequency component extracting unit 7 and the chroma signal for the respective pixels generated by the chroma signal generation unit 9.

Claims8

Dependent claims

An image processing device that processes image signals from an image capturing element in which a plurality of types of photoelectric conversion elements each outputting an image signal of any one of a plurality of primary color components are arranged for each pixel in accordance with a predetermined arrangement rule, the image processing device comprising:

an interpolation unit for implementing an interpolation process to image signals of respective pixels received from the image capturing element by using image signals of adjacent pixels to obtain an image signal of a plurality of primary colors for each of the pixels;
a high-frequency component extracting unit for extracting a high frequency component contained in the image signals received from the image capturing element;
a false-color reduced color signal generation unit for obtaining a false-color reduced color signal in which an effect of a false color is reduced, from the image signal of the plurality of primary colors for the respective pixels;
a chroma signal generation unit for generating a chroma signal for each of the pixels on the basis of a signal value of the false-color reduced color signal;
and
a suppression unit for suppressing the false color contained in the image signal of the plurality of primary colors for the respective pixels on the basis of the chroma signal and the high frequency component;
wherein the image capturing element is formed such that primary colors R, G and B are arranged in a Bayer matrix;
and
wherein the false-color reduced color signal generation unit generates a (R+B) component as the false-color reduced color signal.

6 more elements

An image processing device that processes image signals from an image capturing element in which a plurality of pixels are two-dimensionally arranged and each of the plurality of pixels outputs an image signal corresponding to a color component of R, G, B arranged in a Bayer matrix, the image processing device comprising:

an interpolation unit for implementing an interpolation process to image signals of any one of the color components received by the respective pixels from the image capturing element to interpolate image signals of different color components from the received any one of the color components by using image signals of adjacent pixels to obtain an image signal of a color component R, G, B for each of the pixels;
a high-frequency component extracting unit for extracting a high frequency component of the image signal of the G component by using the image signal of the G component contained in the image signals received from the image capturing element;
a false-color reduced color signal generation unit for obtaining a false-color reduced color signal which is a signal calculated by adding an image signal of the R component and an image signal of the B component and subtracting an image signal of the G component whose gain is adjusted for the respective pixels;
a chroma signal generation unit for generating a chroma signal for each of the pixels on the basis of a signal value of the false-color reduced color signal;
and
a suppression unit for suppressing the false color contained in the image signals of the R component and the B component for the respective pixels on the basis of the chroma signal and the high frequency component.

3 more elements

an interpolation unit for implementing an interpolation process to image signals received by the respective pixels received from the image capturing element by using image signals of adjacent pixels;
a color space conversion unit for converting the image signal obtained by the interpolation unit for the respective pixels into image signals represented in a color space having a brightness component and two color difference components;
a high-frequency component extracting unit for extracting a high frequency component of a signal value of a brightness component for each of the pixels on the basis of a signal value of the brightness component;
a false-color reduced color signal generation unit for obtaining, for each of the pixels, a signal corresponding to a false-color reduced color signal, which is a signal calculated by adding an image signal of the R component and an image signal of the B component and subtracting an image signal of the G component whose gain has been adjusted, by using a linear sum of the signal values of the two color difference components;
a chroma signal generation unit for generating a chroma signal for each of the pixels on the basis of a signal value of the false-color reduced color signal;
and
a suppression unit for suppressing the false color contained in the signal values of the two color difference components for each of the pixels on the basis of the chroma signal and the high frequency component.

4 more elements

Dependencies are inferred from the claim text.

Image processing device

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Image processing device

Life of this patent

Abstract

Claims8