oversharpening
ben
so I thought it was worth bringing up.
Looking at the range of TVs in my local Currys the other day, I was
amazed at the amount of oversharpening on all of them. For example the
Currys logo, white text on a red background. Scanning along a line a
vertical stroke on the lettering, say the downstroke on the letter r,
was about 1cm wide on a decent sized screen (quite chunky writing) but
to the right of it, rather than returning to red, there was another cm
or so of black before the red came back - presumably overshoot from
poorly implemented and excessively applied sharpening. Similar effect
observed when watching ordinary programs, whenever there is a step
change in brightness, even a small one, the picture is ruined by
saturated white and black all over the place which simply shouldn't be
there. On some sets displaying films from a nice clean source like DVD
it even creates an effect like the ghosting you get with analogue TV
reception where an object has one edge, then to the right the same edge
again, then sometimes a third one aswell. The amazing thing is that this
is the default sharpness setting and on many sets and, especially when
fed with RGB, it can't actually be altered on most. In contrast (no pun
intended) my philips TV automatically turns off all sharpening when fed
with RGB and the effect is spectacular, more like watching a cinema
screen than a television.
As usual, my tastes appear to be at odds with the preferences of most
people (presumably the pictures are sharpened to this extent because
thats what people like). Am I alone in my little puritanical world, or
is anyone else's viewing pleasure impaired by oversharpening? I would
have thought that in an age where many people spend all day in front of
a computer screen, they would be particularly sensitive to this kind of
picture defect.
Fray Bentos Dave
near full. I think its because they are in brightly lit stores.
dave
"ben" <b...@nospam.com> wrote in message
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JPG
The standard of adjustment of TV sets in most stores is appalling, especially
sharpness and contrast.
Also, as they are 16:9 sets, they always stretch the analogue signal (it is
usually that or sky digital, all 4:3). so J-Lo looks like Lisa Riley.
JPG
Mat Overton
especially
> sharpness and contrast.
>
> Also, as they are 16:9 sets, they always stretch the analogue signal (it
is
> usually that or sky digital, all 4:3). so J-Lo looks like Lisa Riley.
>
feed from an rf distribution amp, so the pictures are crap anyway.
I don't know why they can't simply set up two boxes one for widescreen and
one for 4:3 and feed the correct TV the correct aspect ratio!!!!!
Bondee
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