[vlc-devel] Re: [PATCH] Sharpen video_filter
Cedric.Cocquebert at supelec.fr
Tue Feb 6 18:01:11 CET 2007
A patch to be coherent with 'var_create' option and fix an init bug on
Windows/Cygwin ... ('sharpen-sigma' was always 0)
----- Original Message -----
From: "Sigmund Augdal Helberg" <dnumgis at videolan.org>
To: <vlc-devel at videolan.org>
Sent: Sunday, February 04, 2007 9:07 PM
Subject: [vlc-devel] Re: [PATCH] Sharpen video_filter
> On 2/4/07, Jean-Baptiste Kempf <jb at videolan.org> wrote:
>> On Sun, Feb 04, 2007, xxcv wrote :
>> > I think a reasonable sigma default value should be .05
>> euh... Why not. I have no idea of it.
> Indeed the default value looked much too high..
>> I tried sharpen on a HD video clip and indeed its choppy :)
>> So I need to improve a bit more the code ?
> I thought the idea of HD was that the video should be sharp? And, if the
> unsharpness comes from camera focus the filter will be less effective as
> works on a fixed amount of pixels (3x3). For HD I'd say this
> filters will only be usable to enhance allready sharp edges.
>> How efficient is sharpen when using it on interlaced vs progressive HD
>> > video clip ?
>> No idea.
> You _definitly_ want to deinterlace the video first. Most likely event
> then the filter will enhance
> the deinterlacing artefacts.
>> Jean-Baptiste Kempf
>> This is the vlc-devel mailing-list, see http://www.videolan.org/vlc/
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