NOISE FILTERING AND IMAGE SHARPENING UTILIZING COMMON SPATIAL SUPPORT

摘要

An image processing pipeline may perform noise filtering and image sharpening utilizing common spatial support. A noise filter may perform a spatial noise filtering technique to determine a filtered value of a given pixel based on spatial support obtained from line buffers. Sharpening may also be performed to generate a sharpened value of the given pixel based on spatial support obtained from the same line buffers. A filtered and sharpened version of the pixel may be generated by combining the filtered value of the given pixel with the sharpened value of the given pixel. In at least some embodiments, the noise filter performs spatial noise filtering and image sharpening on a luminance value of the given pixel, when the given pixel is received in a luminance-chrominance encoding.

主权项

1. An apparatus, comprising:
an image signal processor that comprises a noise filtering and image sharpening unit, wherein the image signal processor is configured to:
receive, at the noise filtering and image sharpening unit, a luminance value for a pixel of an image frame in a luminance-chrominance encoding;apply, by the noise filtering and image sharpening unit, a spatial noise filtering technique to generate a filtered luminance value for the pixel, wherein spatial support for the spatial noise filtering technique is obtained from one or more line buffers at the image signal processor maintaining a plurality of other pixels of the image frame;sharpen, by the noise filtering and image sharpening unit, a frequency range of the luminance value to generate a sharpened luminance value for the pixel, wherein spatial support to sharpen the frequency range is obtained from the one or more line buffers; andcombine, by the noise filtering and image sharpening unit, the filtered luminance value and the sharpened luminance value of the pixel to generate a new version of the pixel as part of a noise filtered and sharpened version of the image frame.