horizontal only sharpening?

[scharfis_brain]

Hello!

I'm searching for a sharpening filter, that only sharpens in horizontal direction.
I want to use it for VHS-captures to make them look a little bit better.
In vertikal direction there is a LOT of detail on VHS tapes, which needs no additional sharpening. Here, sharpening would make the picture look worse, while in hor. direction the picture isn't sharpened enough.

[Schlumpf]

IIRC Unfilter by Tom Barry will do what you want.

[scharfis_brain]

hmm.
VHS seems to be that unsharp, so unfilter doesn't sharp anything in the horizontal direction. I've made on Pic with unfilter (100,0), one without unfilter and then I'd compared both.
Result: no visible sharpening :(

filters like unsharpmask or warpshap would be nice, but this filters will sharpen the whole image....

[yaz]

Originally posted by scharfis_brain
I'm searching for a sharpening filter, that only sharpens in horizontal direction.

core sharpen! dunno whether it's intentional or not, but it does!

the bests
y

[neily]

Hi,

Since I think v2.08, the internal sharpen filter supports horizontal only sharpening. From the online manual:

Sharpen(clip clip, float amount)
or Sharpen(clip, float amountH, float amountV)

You can use 2 arguments to set independent Vertical and Horizontal amounts. Like this, you can use Blur(0,1) to filter only Vertically, for example to blend interlaced lines together.