Macropixel processing system, method and article
AssigneeSTMicroelectronics (Grenoble 2) SAS
InventorsMathieu Thivin, Pierre-Francois Pugibet
Life of this patent
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Abstract
Digital image processing circuitry converts a macro-pixel of an image in a color filter array (CFA) color space to a macro-pixel in a luminance-chrominance (YUV) color space. Chrominance filtering is applied to chrominance components of the converted macro-pixel in the YUV color space, generating a filtered macro-pixel in the YUV color space. The filtered macro-pixel in the YUV color space is converted into a filtered macro-pixel in the CFA color space.
Claims20
A method, comprising:
- converting, using digital image processing circuitry, a macro-pixel of an image in a color filter array (CFA) color space to a macro-pixel in a luminance-chrominance (YUV) color space, wherein a macro-pixel includes at least two pixel rows and at least two pixel columns and the converting includes simultaneously receiving pixel data defining the macro-pixel in the CFA color space;
- filtering, using the digital image processing circuitry, chrominance components of the macro-pixel in the YUV color space;
- and
- converting, using the digital image processing circuitry, the filtered macro-pixel in the YUV color space to a filtered macro-pixel in the CFA color space.
A device, comprising:
- a first conversion circuit configured to convert a macro-pixel of an image in a color filter array (CFA) color space to a macro-pixel of an image in a luminance-chrominance (YUV) color space in a first step, wherein a macro-pixel includes at least two pixel rows and at least two pixel columns and the converting includes simultaneously receiving pixel data defining the macro-pixel in the CFA color space;
- a filter configured to filter chrominance components of the converted macro-pixel in the YUV color space in a second step, generating a filtered macro-pixel in the YUV color space;
- and
- a second conversion circuit configured to convert the filtered macro-pixel in the YUV color space to a filtered macro-pixel in the CFA color space.
A system, comprising:
- one or more image capture devices, which, in operation, capture digital images;
- and
- digital image processing circuitry, which, in operation:
- converts a macro-pixel of an image in a color filter array (CFA) color space to a macro-pixel in a luminance-chrominance (YUV) color space, wherein a macro-pixel includes at least two pixel rows and at least two pixel columns and the converting includes simultaneously receiving pixel data defining the macro-pixel in the CFA color space;
- filters chrominance components of the converted macro-pixel in the YUV color space;
- and
- converts the filtered macro-pixel in the YUV color space to a filtered macro-pixel in the CFA color space.
A non-transitory computer-readable medium having contents which cause digital image processing circuitry to process digital images by performing a method, the method comprising:
- converting a macro-pixel of an image in a color filter array (CFA) color space to a macro-pixel in a luminance-chrominance (YUV) color space, wherein a macro-pixel includes at least two pixel rows and at least two pixel columns and the converting includes simultaneously receiving pixel data defining the macro-pixel in the CFA color space;
- filtering chrominance components of the converted macro-pixel in the YUV color space;
- and
- converting the filtered macro-pixel in the YUV color space to a filtered macro-pixel in the CFA color space.
Dependencies are inferred from the claim text.