此花绮谭原盘画质较差。其色度平面尤其糟糕,有非常严重的锯齿和明显的偏移,这使得在观看时容易看到彩色的锯齿。亮度平面也有可见的锯齿,部分场景有晕轮。
针对以上问题,我们对色度平面做了很强的抗锯齿处理,并修复了色度偏移;对亮度平面做了较强的抗锯齿。最后进行去晕轮处理,配合较高的码率进行压制。
The source quality is poor, especially in the chroma plane where there is bad aliasing and shifting, which leads to color aliasing when viewing. There's also visible aliasing in the luma plane, together with ringing in some scenes.
To deal with aforementioned issues, we applied strong anti-aliasing to chroma planes and fix chroma shift. We applied relatively strong anti-aliasing to luma plane. Lastly we de-ringed and encoded with relatively high bit-rate.