Method and apparatus for bayer mosaic image conversion
First Claim
Patent Images
1. A method of sampling a Bayer image having two dimensional planes of red, green and blue pixels, the method including the steps of:
- rotating the green plane by 45°
to provide a rotated green plane having a relative rotational orientation;
sequentially sampling m2 pixels in an m×
m pixel block of the rotated green plane, thereby providing m2 samples of the rotated green plane, where m is an integer greater than 1;
providing an address for the m2 samples by determining a starting address for a first of the samples, in response to the relative rotational orientation of the rotated green plane; and
applying thereafter a predetermined fixed sequence of offsets to obtain addresses of the remaining samples of the rotated green plane.
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Abstract
A method of, and an apparatus for, image conversion. The three color channels of a Bayer mosaic image are up-interpolated from input space to output space. The pixels sampled from each two-dimensional color plane of the Bayer image are convolved with a coefficient kernel for each color. To facilitate reconstruction and resampling, the color space for a dominant pixel color of the Bayer image is effectively rotated.
The generation of each color value for a given pixel coordinate is carried out in parallel using an identical convolve unit and a dedicated coefficient kernel for each color.
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Citations
3 Claims
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1. A method of sampling a Bayer image having two dimensional planes of red, green and blue pixels, the method including the steps of:
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rotating the green plane by 45°
to provide a rotated green plane having a relative rotational orientation;sequentially sampling m2 pixels in an m×
m pixel block of the rotated green plane, thereby providing m2 samples of the rotated green plane, where m is an integer greater than 1;providing an address for the m2 samples by determining a starting address for a first of the samples, in response to the relative rotational orientation of the rotated green plane; and applying thereafter a predetermined fixed sequence of offsets to obtain addresses of the remaining samples of the rotated green plane. - View Dependent Claims (2)
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3. An apparatus for sampling a Bayer image having two dimensional planes of red, green and blue pixels, the apparatus comprising:
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an input receiving mechanism to rotate the green plane by 45° and
to provide a rotated green plane having a relative rotational orientation;a sampler to sequentially sample m2 pixels in an m×
m pixel block of the rotated plane and to provide m2 samples of the rotated green plane where m is an integer greater than 1;address generating mechanism to provide an address for the m2 samples by determining a starting address for a first of the samples and thereafter applying a predetermined fixed sequence of offsets to obtain addresses of the remaining samples of the rotated green plane.
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Specification