[mythtv] [PATCH] Fix for commercial flagging using logo detection

[Petter Gundersen]

On Fri, 18 Feb 2005 01:06:59 -0500 (EST), Chris Pinkham
<cpinkham at bc2va.org> wrote:
> > The patch also adds some values to the edgeDiffs[] array. I have
> > experienced needing a value as high as 50 to detect the logo area.
> 
> This is in there also, I don't beleive this can cause false positives.
> Are these logos transparent or opaque?  I never even tried bumping it
> up that high, maybe that's why I wasn't getting results as good as I
> hoped when testing opaque logos.
> 

I have only tried it with two different logos. One of the logos
(Norwegian ZTV for those interested) is a opaque logo with a
transparent ring around it. The other logo (Norwegian TV3) is somewhat
transparent. I usually need a high edgeDiff value for both logos.

The needed value is related to the first frame behavior I mentioned on
mythtv-users. If the logo is present at the beginning of a recording
it's usually enough with edgeDiff = 7. If the recording is started
during commercials and the logo is not present until a couple of
minutes into the recording, a value of 40-100 is needed. I don't
understand why, though.

Regards,
Petter