Color filter array image data processing

An image signal processor comprising circuitry configured to:

• receive color filter array, CFA, image data comprising a plurality of pixel values in a frame of image data representable as a main two-dimensional row-columnar pattern, each pixel value corresponding to a color filter in a CFA, wherein different pixel values of the plurality of pixel values are associated with respective different filter colors including first pixel values associated with a first filter color and second pixel values associated with a second filter color, wherein:
• the first pixel values are arranged in at least a two-dimensional checkerboard sub-pattern in the main two-dimensional row-columnar pattern;
• performing a diagonally-aligned processing operation on the first pixel values, wherein the processing operation operates on the first pixel values in accordance with a reprojected array, the reprojected array corresponding to a reprojection of the two-dimensional checkerboard sub-pattern into a row-columnar array;
• and
• generate output image data resulting from performing said diagonally-aligned image processing operation on the first pixel values.

An imaging system comprising:

• an image sensor;
• and
• an image signal processor comprising circuitry configured to:
• receive color filter array, CFA, image data from the image sensor, the CFA image data comprising a plurality of pixel values in a frame of image data representable as a main two-dimensional row-columnar pattern, each pixel value corresponding to a color filter in a CFA, wherein different pixel values of the plurality of pixel values are associated with respective different filter colors including first pixel values associated with a first filter color and second pixel values associated with a second filter color, wherein:
• the first pixel values are arranged in at least a two-dimensional checkerboard sub-pattern in the main two-dimensional row-columnar pattern;
• performing a diagonally-aligned processing operation on the first pixel values, wherein the processing operation operates on the first pixel values in accordance with a reprojected array, the reprojected array corresponding to a reprojection of the two-dimensional checkerboard sub-pattern into a row-columnar array;
• and
• generate output image data resulting from performing said diagonally-aligned image processing operation on the first pixel values.