The source quality of Sekirei S1 is indeed horrible, with very strong edge aliasing/ringing effect, and fairly visible color-banding. We first inverse-upscale the BD into 720p, then we separate the edge and non-edge area for pre-processing. for the edge area, we performed anti-aliasing and de-ringing to remove the artifacts, for non-edge areas, we performed de-banding and de-blocking. Finally we performed some repair to limit the side effect.
For the screenshots below, we used non-ringing lanczos 4 method to upscale the BDRip into 1080p, in order to make a fair comparison with the source.
10bit 720p AVC + FLAC, MKV format, ~700MB per EP.
Comparison (right click on the image and open it in a new tab to see the full-size one) Source________________________________________________Encode