Quote:
Originally Posted by e-t172
Because the best image quality is obtained with a gaussian point spread function, which is the ideal goal for an image upscaler.
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I'm not sure why you think a gaussian PSF is the ideal goal for an image upscaler. If that was the case then using a Gaussian kernel for upscaling would be ideal, but that tends to result in images which are quite blurry.
As far as I could find the article you linked didn't claim that Gaussian was best, just that it was better than a box filter.