deinterlace

[matriplex]

is there anyone who can help me about deinterlace? what are blend fields and interpolate fields? what do they mean? are there any ......fields more?what are the differences and advantages between each other? I will be glad if anyone helps me. (I don't know english very very well so please make clear and simple sentences)

[manono]

Hello-

From the DecombFAQ that comes with the AviSynth Decomb IVTC/Deinterlacing filter:

Technically, what is the difference between blending and interpolation?
Suppose you have 3 pixels on successive lines and the same x offset:

a
b
c

If you decide that pixel b is combed, and you replace it with (0.5*a+0.5*c) that is (linear) interpolation. If you replace it with (0.25*a+0.5*b+0.25*c), that is blending. Note that when interpolating, the even lines are passed through and the odd lines are calculated as described. For blending, every line is calculated. Blending thus produces a blend of the two fields while interpolation uses data from one field only. That is why people say that blending causes "ghosting". You can eliminate the ghosting by setting blend=false. Also note that while interpolation can be calculated in place, blending cannot. Interpolation is a little faster.

Blending blends the 2 fields together, and interpolation creates a full frame using only one of the fields as a source. Blending produces ghosting/double images, and interpolation throws out half the resolution and creates jaggies/aliasing. There are better deinterlacers available.

[guns1inger]

Not everything on this page is accurate, and not all recommendations should be followed blindly, however it does cover the ground you seek with a lot of examples

http://100fps.com/