Stipple sizes affect the measurement too. Based on those two tables, it seems we should get better tone in some way. I am not sure if the adjustment can compete with Secord's method at very low budget. But it looks it should have some peak tone matching for our method. I am going to try different size calculation to see if we can improve the tone in some way.
MSSIM: Both of ours have better matching than Kim's method. Our ETF method is using very dense version. P1(0,0,0,7) and P2(5,3,0,7). Both our ETF and basic methods is using averge intensity (previously is using the original intensity) to adjust the stipple size when doing postprocess.
PSNR: Secord's method has the best matching. Both ours are better than others.(Old matlab codes for psnr is using unsigned int. Here is using double. Fix up the 'inf' problem.)
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