原盘正片的原生分辨率主要为720p,虽然主要人物的描线比较清晰,但是拉升到1080p后画面整体还是太过柔和。而背景中很多路人使用CG合成,边缘线条不但突兀而且有锯齿。因此根据相应的放大算法将线条逆向为720p,再使用优秀的拉升算法缩放为1080p,使得成品的线条锐利度得到较大的提升;另外配合抗锯齿,deringing操作让线条更加流畅干净,最后进行了轻微的去色带处理。此外还针对第二个OP以及ED中FHD的Staff信息进行了相应的保护。
The native resolution of BD source is mainly 720p and is BD remastered to 1080p, which causes a soft image style. And those CG made passers-by have aliased outer lines. Taking these into consideration, we invertibly downscale the source to 720p and then upscale it back to 1080p using superior upscaling algorithm, which largely increases sharpness. Other pre-processing includes de-ringing and anti-aliasing, plus slight de-banding, making lines in a higher clarity. Besides, the staff credit in OP/ED part, which has native 1080p resolution, were particularly protected.
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