colour blending

Hi,

I have not a *real* krita question but rather a more
fundamental question 
regarding colour handling.
But maybe you want to read (and answer) it anyhow...
I created a colour bar with a black, blue, red, magenta,
green, cyan, yellow 
and a white bar.
I put the colours directly side by side. So if I take a look
at e.g. the
blue-red-border at pixel level I see that a "blue"
pixel is directly adjacent 
to a "red" one.
If I put this picture onto a video output(SDI) and then into
a waveform 
monitor it shows some ugly overshots between each colour
border.
I've taken a look into a "professional" colour bar
(from a Tektronix TG700 
Video Generator) and found out that the colours fade from
one to another 
using five pixel for blending. 
I think my solution putting the colours directly to each
other introduced some
high frequencies at signal level.
My simple questions are: Is there some kind of filter (a
low-pass filter??) to
eliminate these frequencies? Is there such a filter in
Krita?
If yes, how is it named?

Kind regards and thank you for reading all this,
Uwe Andersen

P.S.: I created the colour bar directly in the YCbCr
-Space(what is used on 
SDI) so that it can be excluded to be a colour model
conversion problem.

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What about a simple blur? Or is there something like edge
blur? Or a glow.

2007/12/1, Uwe Andersen <uwe-andersenfoni.net>:
> Hi,
>
> I have not a *real* krita question but rather a more
fundamental question
> regarding colour handling.
> But maybe you want to read (and answer) it anyhow...
> I created a colour bar with a black, blue, red,
magenta, green, cyan, yellow
> and a white bar.
> I put the colours directly side by side. So if I take a
look at e.g. the
> blue-red-border at pixel level I see that a
"blue" pixel is directly adjacent
> to a "red" one.
> If I put this picture onto a video output(SDI) and then
into a waveform
> monitor it shows some ugly overshots between each
colour border.
> I've taken a look into a "professional"
colour bar (from a Tektronix TG700
> Video Generator) and found out that the colours fade
from one to another
> using five pixel for blending.
> I think my solution putting the colours directly to
each other introduced some
> high frequencies at signal level.
> My simple questions are: Is there some kind of filter
(a low-pass filter??) to
> eliminate these frequencies? Is there such a filter in
Krita?
> If yes, how is it named?
>
> Kind regards and thank you for reading all this,
> Uwe Andersen
>
> P.S.: I created the colour bar directly in the YCbCr
-Space(what is used on
> SDI) so that it can be excluded to be a colour model
conversion problem.
>
> _______________________________________________
> kimageshop mailing list
> kimageshopkde.org
> http
s://mail.kde.org/mailman/listinfo/kimageshop
>


-- 
Are you teaching the What and the How but without the Why
and the When?
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