@Michael, whats a good kernel size for the ISP pipeline, does the size stay the same for every ISP block? for example 3x3, 5x5, 8x8 ?
That's a complicated question, and it depends on the algorithm, the sensor resolution and the optics. For example, a good Bayer demosaic needs at least 7x7, a sharpening kernel probably 3x3 or 5x5, a spatial NR kernel could be much bigger --our biggest is 128x64! It depends on the characteristic scale of the feature being processed. Obviously with high megapixel sensors, a given feature requires bigger kernels.
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