I'd reckon there's probably room for about 2x2 subpixels' worth of "antialiasing", making the search space 4x3=12 dimensional (probably in Lab colorspace). Is t

I'd reckon there's probably room for about 2x2 subpixels' worth of "antialiasing", making the search space 4x3=12 dimensional (probably in Lab colorspace). Is that doable? If yes I'd expect the approach to be close to optimal possible.