This project combines JPBD released by Aniplex and USBD released by Funimation.
The source is of mediocre quality. Though it has a native resolution of 873p, the typical secondary upscale shown led to an intermediate resolution of 976.2p. The studio used a relatively inferior algorithm and may have added some sharpening, which caused aliasing and ringing to occur in blurred lines. We handled them by descaling and reconstruction, then fixed the remaining aliasing and ringing. The source doesn't have severe colour banding, but serious blocking and banding occur in the two episodes of the 6th volume of JPBD. Please check the 1st, 2nd and 7th pair of screenshots. Although the USBD hasn't shown this problem, it seems more blurred than the JPBD, especially in 1080p text parts. We think it might suffer from secondary scaling. So we integrated the chroma planes from both versions, with line parts from JPBD and flat area from USBD. Finally, we applied adaptive de-banding and de-noising, and compensatory sharpening.
感谢所有资源提供者 / Thank to all resource providers:
BD&SPCD: 千夏字幕組
CD: {ga035805, 七七咖咖}@TSDM, Tsukasa@nyaa