P.A.Works 十五周年纪念作,作画还算不错,原生分辨率 720p,可惜使用的拉升算法比较偏门,虽然提升了不少锐度,但也导致线条有极重的锯齿和中等程度的振铃。除此以外,原盘画质还算可以,色带不多,纹理偏多噪点偏少。处理上,为了尽可能在不降低锐度的前提下消除锯齿和振铃,我们在逆向拉升重构时使用了较为激进的还原算法和较为优质的拉升算法,并详细调整了拉升时的各项参数,再辅以一定的锐化补偿。然后是常规抗锯齿、去色带、自适应降噪。
Kuromukuro, as P.A. Works 15th anniversary project, has pretty decent sakuga. The native resolution is 720p, but they used a rather unconventional upscaling algorithm. While it did improve the sharpness a lot, it also caused heavy aliasing and moderate ringing. Aside from that, the source quality is okay, with minimal banding, more texture, and less noise. To eliminate aliasing and ringing as much as possible without reducing sharpness, we used a rather aggressive descaling algorithm and high-quality upscaling algorithm during the descaling and reconstruction process, carefully tweaking all the parameters. The whole process was then complemented by compensatory sharpening. Finally we did the usual anti-aliasing, de-banding, and adaptive denoising.