线条纤细,锯齿粗糙,分辨率混乱,锐度不均。由于很多锯齿是线条太细触及分辨率极限导致的,为了尽可能消除锯齿同时避免锐度损失,我们使用了多种抗锯齿算法以控制力度,并进行了补偿性锐化。当然还是有一些次像素锯齿过于锐利,加上部分线条粗细不匀,强力处理劣化严重,这部分我们只能尽力修复。最后我们削减了部分噪点以控制体积。
The lines are thin, and the aliasing appears coarse, with inconsistent native resolution and uneven sharpness. Because much of this aliasing is caused by lines that are too thin for the native resolution, we applied multiple anti-aliasing algorithms to minimize aliasing while preserving sharpness, and then followed by compensatory sharpening. However, some lines are overly sharp, making the remaining sub-pixel aliasing more noticeable. But those lines are of uneven thickness, aggressive processing would have caused huge sharpness degradation, so we can just try and fix it. Finally, we performed moderate denoising to manage the final bit-rate.