This can be done by comparing frames by time or by space/position.This gives you good results in quiet scenes where not much is moving, because there is nothing blurred then.This seems to me a much better idea than Blending, but unfortunately I don't know any filter or program that can do it.The idea is: Blur the mice teeth where needed, instead of mixing (=blending) them with the other field. As you see the blur gets stronger in the direction of the old position.If nothing changes from field to field then "Deinterlacing by Blending" gives you a slight blur.In other words: Deinterlacing by blending (which is one of the most frequent ways to deinterlace) simluates fluent motion by blurring and "mushes" 2 consecutive pictures together.
This is an capture from the music clip "Sexy" performed by "French Affair" from the TV channel Tango TV (from Luxembourg). That means that when you deinterlace a movie for your computer or your projector or your TFT monitor, and you want to play it on a standard TV set, your software (or your hardware) have to interlace it again.Would you believe that one of the newest camcorders by Sony (other Sony camcorders and other brands are better) can record only 15 progressive frames per second in the "Progressive Mode"? There seem to be a ghosty unsharpness when something moves.Another example: Imagine you have the following frame: Original frame This frame consists of: Blending would do this to them: Please note, that not only the area where the movement happened is changed thru blend, but also the green main body.You also have to know that Field1 is Position1 (higher) and Field2 is Position2 (lower).Both field1 and field2 combined together give you the full vertical (top to bottom) resolution.