Need some help with filters

[mit_mis]

I've got Gekiganger III, and it's in poor quality... So I want to resize it, and improve quality. Can you please help me, and tell which filters I need to use, and how the script must look. Now it's in resolution 320x240, and looks...............bad:( I'm not too good in encoding, so please help me...
Here are some images:
http://mit_mis.w.interia.pl/geki1.pnghttp://mit_mis.w.interia.pl/geki2.png
http://mit_mis.w.interia.pl/geki3.pnghttp://mit_mis.w.interia.pl/geki4.png

[SoonUDie]

What's your source? VCD? XviD/DivX?

[mit_mis]

Stats form GSpot:
4CC: MP42
Name: S-Mpeg 4 version 2
Bitrate: 403kb/s

[SoonUDie]

Well, you can try this script. Paste this into a text editor and save as "pickaname.avsi", and move the .avsi into your Avisynth/Plugins directory:
LoadPlugin("ChromaShift.dll")
LoadPlugin("warpsharp.dll")

function Soon_SharpSizeLQ(clip "a", int "warp", int "shift")
{
warp = default(warp, 120)
shift = default(shift, 0)

x = a.width()
y = a.height()

a = a.LancZos4Resize(x*2, y*2)

lum = a.WarpSharp(warp).Sharpen(0.5).ConvertToYUY2().TemporalSoften(2,3,4,15,2).SpatialSoften(4,4,8)
lum = mergeLuma(lum, lum.ColorYUV(autogain=true), 0.4).ConvertToYV12()

chr = a.ChromaShift(l=shift)

return mergeChroma(lum, chr)
}


In your case, you could call it using:
Soon_SharpSizeLQ(last, 180, -4)


Note that you will need ChromaShift.dll and WarpSharp.dll.

Result:
http://students.oxy.edu/tcoldwell/forum_uploads/newGeki2.jpg

Your milage may vary.

[mit_mis]

ok, thanks, but when I'll resize it, will it be in good quality?

[SoonUDie]

Originally posted by mit_mis
ok, thanks, but when I'll resize it, will it be in good quality? You'll have to decide for yourself.

It's not perfect. Here's an example where it creates some "mosiacing" (but I think it still looks better than the lanczosResized original):
http://students.oxy.edu/tcoldwell/forum_uploads/newGeki1.jpg
http://students.oxy.edu/tcoldwell/forum_uploads/newGeki1b.jpg

[mit_mis]

what about bicubicresize?? and how did you applied this script to the image?

[SoonUDie]

Originally posted by mit_mis
what about bicubicresize?? and how did you applied this script to the image? Bicubic resize is a little blurrier than the bottom pic above.


Your entire script would look like this:
DirectShowSource("blah.avi")

Soon_SharpSizeLQ(last, 180, -4)


That's it.

[mit_mis]

but, how did u applied it to the image??

[Manao]

To remove the ringing around the edges, add something like that after the function of SoonUDie: masklow = source.msmooth(threshold=5,mask=true,highq = true)
maskhigh = source.msmooth(threshold=10,mask=true,highq = true)
mask = hysteresymask(maskhigh,masklow,Y=3,u=1,v=1)

filtered = source.deen("a2d",3,8,15)

return source.maskedmerge(filtered,mask,y=3,u=1,v=1)or if you think it's too slow, mask = source.msmooth(threshold=10,mask=true,highq = true)

filtered = source.deen("a2d",3,8,15)

return source.maskedmerge(filtered,mask,y=3,u=1,v=1)

[mit_mis]

speed doesn't matter, but how will the script look now?

[Manao]

LoadPlugin("ChromaShift.dll")
LoadPlugin("warpsharp.dll")
LoadPlugin("MaskTools.dll")
LoadPlugin("Msmooth.dll")
LoadPlugin(Deen.dll")

function Soon_SharpSizeLQ(clip "a", int "warp", int "shift")
{
warp = default(warp, 120)
shift = default(shift, 0)

x = a.width()
y = a.height()

a = a.LancZos4Resize(x*2, y*2)

lum = a.WarpSharp(warp).Sharpen(0.5).ConvertToYUY2().
\ TemporalSoften(2,3,4,15,2).SpatialSoften(4,4,8)
lum = mergeLuma(lum, lum.ColorYUV(autogain=true), 0.4).ConvertToYV12()

chr = a.ChromaShift(l=shift)

return mergeChroma(lum, chr)
}

function DeRinging(clip "source", int "thlow", int "thhigh", int "thluma", int "radius")
{

thlow = default(thlow,5)
thhigh = default(thhigh,10)
thluma = default(thluma,8)
radius = default(radius,3)

masklow = source.msmooth(threshold=thlow,mask=true,highq = true)
maskhigh = source.msmooth(threshold=thhigh,mask=true,highq = true)
mask = hysteresymask(maskhigh,masklow,Y=3,u=1,v=1)

filtered = source.deen("a2d",radius,thluma,15)

return source.maskedmerge(filtered,mask,y=3,u=1,v=1)
}And after using Soon's function, you add DeRinging(last,5,10,8,3)

Now, for the use of the parameters :
- reducing thlow will increase the area on which the deringing is applied ( by making it thicker and longer )
- reducing thhigh also increase that area, but by adding new edges to be reringed
- radius will increase the strength of the deringing
- thluma also

If you want to see the area being deringed, instead of returning source.maskedmerge[...], return mask.

[SoonUDie]

Manao, your function seems to work very well at smoothing gradiants. I'll be sure to keep this one ;)

[Manao]

SoonUDie : strange : it is designed to work only around the edges, so gradients should not be smoothed. Have a look at the mask to see if it is correct. For large-scale ringing, try to increase the thluma and the radius.

[mit_mis]

what do you think, about using filters like conv3d or 2dcleaner?? will they improve the quality?

[SoonUDie]

Originally posted by Manao
SoonUDie : strange : it is designed to work only around the edges, so gradients should not be smoothed. Have a look at the mask to see if it is correct. For large-scale ringing, try to increase the thluma and the radius. You're right, I was being weird. The gradiant smoothing I got was from setting thlow=1. Anything above one works only on "real" edges. However, I like the smoothing with thlow=1, so I'll keep in that mind for later ;)

But like I said earlier, is there really enough of an improvement with deringing in this case to justify the speed hit?

[mit_mis]

I've got an error:
Script Error: there's no function named hysteresymask.
What's wrong?

[Manao]

You need the latest version of the masktools :

http://forum.doom9.org/showthread.php?s=&threadid=67232

[mit_mis]

It's not a good idea to use SoonUDie script, cause it looks like painted!! any other ideas??

[lamer_de]

It's not a good idea to use SoonUDie script, cause it looks like painted!! any other ideas??
Go find a better source!

Honestly, what do you expect from a 320x240 noisy vhs cap video blown up to double resolution? If your source is crap, your final result will most likely be crap aswell. Filters can help you to achieve a more pleasing result, but they can't suprpass such strong limitations in the source.

CU,
lamer_de

[mit_mis]

I can't find a better source:( I even can't find a dvd with it:(

[SoonUDie]

Originally posted by mit_mis
It's not a good idea to use SoonUDie script, cause it looks like painted!! any other ideas?? Like lamer_de said, there's not a lot you can do with such a nasty clip. The "painted" look is something you'll have to live with if you want a denoised, sharpened picture.

If you want something a little less painted but a lot more noisy, change
SpatialSoften(4,4,8) to SpatialSoften(3,1,6), and use a "warp" parameter between 60-100.

[mit_mis]

ok, I've written something like this:

LoadPlugin("D:\Nowy folder\MaskTools-v1.4.6\Sources\MaskTools149.dll")
LoadPlugin("D:\Nowy folder\MaskTools-v1.4.6\Sources\warpsharp.dll")
LoadPlugin("awarpsharp.dll")
LoadPlugin("D:\Nowy folder\temporalcleaner_25_dll\temporalcleaner.dll")
LoadPlugin("Convolution3d.dll")
LoadPlugin("D:\Nowy folder\MaskTools-v1.4.6\Sources\awarpsharp.dll")
LoadPlugin("_2DCleanYUY2_for_25.dll")
AviSource("C:\sysreset\download\Gekiganger_III.avi")
Import("skrypty.avs")
Import("D:\Nowy folder\MaskTools-v1.4.6\Sources\mfToon-v0.52.avs")
ConvertToYV12()
TemporalCleaner (ythresh=5, cthresh=10)
mfToon()
DeRinging(last,5,10,8,3)
ConvertToYUY2()
lanczosResize(512,384)
Convolution3d(preset="animeLQ")
_2DCleanYUY2(0,6,2,2,0,4,4)
ConvertToYV12()
aWarpSharp(16.0, 2, 0.5, 1)

is this good?? however it's working... but... maybe it can be better