Right ON! FFDShow Lanczos >4 (meaning 5,6,7,8,9,10) gives heavy ringing around vertical line. Many people complain about EE and yet they apply so much sharpen on the image...
|Originally posted by dmunsil|
The big, big downside to long filters is that they exhibit excessive ringing on sharp transitions. You can't see it in this particular sample, but it's pretty easy to see on suitably sharp material, and it varies in visibility depending on the scaling ratio. Many of the test patterns in Avia show it off quite well. Titles on video often show little halos around them when many-lobe filters are being used. I see it on the Alias discs and it bugs the heck out of me.