The Rubber Famous Man
24th March 2014, 22:26
Hi,
I have some PAL content which was originally shot 50i true interlaced. This was then deinterlaced (badly!) to 25p in post production. It seems that all they have done to deinterlace is throw away field 2 of each frame and 'bob', or simply repeat, field 1 to create a progressive field 2. This has resulted in a horrible amount of aliasing.
What I want to do is throw away the existing field 2 completely and create a new field 2 by a much better quality method of interpolation from field 1. Obviously the most simple way of doing this is to separate the fields, discard field 2 and then resize field 1 back to 576. However, this is obviously not the correct way to do it (even though it does reduce the aliasing by a reasonable amount) because any artefacts created by squeezing field 1 into 288 pixels (misaligned diagonal lines etc) will then be scaled up into the resized image.
So can anyone recommend a good way to create a new field 2 by means of purely interpolating the data between the existing scanlines of field 1, rather than simply resizing from 288? Any help is much appreciated.
I have some PAL content which was originally shot 50i true interlaced. This was then deinterlaced (badly!) to 25p in post production. It seems that all they have done to deinterlace is throw away field 2 of each frame and 'bob', or simply repeat, field 1 to create a progressive field 2. This has resulted in a horrible amount of aliasing.
What I want to do is throw away the existing field 2 completely and create a new field 2 by a much better quality method of interpolation from field 1. Obviously the most simple way of doing this is to separate the fields, discard field 2 and then resize field 1 back to 576. However, this is obviously not the correct way to do it (even though it does reduce the aliasing by a reasonable amount) because any artefacts created by squeezing field 1 into 288 pixels (misaligned diagonal lines etc) will then be scaled up into the resized image.
So can anyone recommend a good way to create a new field 2 by means of purely interpolating the data between the existing scanlines of field 1, rather than simply resizing from 288? Any help is much appreciated.