Previous blu ray: http://www.blu-ray.com/movies/screensho ... osition=16
Actual blu ray: http://www.blu-ray.com/movies/screensho ... position=4
Different print source or just sharpness filters ???
Maybe a new print source, that had some blur, but not so much as print used the old blu ray, that get even better with some sharpness correction. Anyway the new blu ray have a lot more image details than the old one.
But for this particular scene the sharpness filter probably was exagerated: http://www.blu-ray.com/movies/screensho ... position=2
Sharpness filters can help. The problem is that manytimes they add sharpness after convert to HD, and not add the filter to the 4K or 2K files, and then convert to HD (1080p).
If you add sharpness before downsample the resolution you will enhance soft details that otherwise would be lost after go to 1080p. So you get more details. But if you add sharpness after convert to 1080p the soft detailçs alread got loss during downsample and you will not get a very good result.
Colege looks good, but somewhat soft a bit. Is they had added just some few sharpness to the 2K files, before go to 1080p, the result would be better and not artifitial.
Remambering that 4:3 HD have just 1480 pixels left to right, while 2K true 4:3 have 2048 pixels left to right.
If Criterion Collection had added some very carefull sharpness correction to the 4K file of CIty Lights (1930) before converto to 1080p.