On Wed, 2004-05-26 at 12:18, Steven M. Schultz wrote:
> On Wed, 26 May 2004, Dan Scholnik wrote:
>
> > Doesn't the ' in Y' indicate that the digital data has been
> > gamma-corrected to compensate for the nonlinear CRT response? In that
>
> I'd guess so - what does one get (Y or Y') when r
>> Out of curiosity, does the noise of the uncompressed recording look
>> worse in black frames than regular ones, or is it only after mpeg
>> compression that things look bad? If the latter, than perhaps you want
>
> The latter. I see the blocks/splotches all the time in dark scenes.
On Wed, 26 May 2004, Dan Scholnik wrote:
> Doesn't the ' in Y' indicate that the digital data has been
> gamma-corrected to compensate for the nonlinear CRT response? In that
I'd guess so - what does one get (Y or Y') when running a S-Video
cable from a VCR to a Canopus box and
On Wed, 2004-05-26 at 00:40, Steven M. Schultz wrote:
> > From what I have read the human eye is able to determine
> > black/gray/white much better than colors. You can fool the eye with only
>
> Right - which is why we see the blocks/splotches in dark scenes. The
> slight variations
On Tue, 25 May 2004, Bernhard Praschinger wrote:
> > Would it make sense to have several 'regions' or 'bands' that have
> > different thresholds? If the majority of the frame has a Y' around
> > 20 +/-4 use a "-t 8", if it's centered about 28 +/- 4 then a "-t 6",
> >
Hallo
> I'm sure you've all see the blocks/splotches in dim/dark scenes - it's
> especially noticeable when fades from or to black occur.
>
> No, I'm not hot on the trail of a new filter - but the visible blocks
> during dark and fade scenes is very annoying and I'
On Sun, 2004-05-23 at 16:09, Steven M. Schultz wrote:
> What's a good metric for determining the "brightness" of a frame?
> Compute a histogram of the Y' values and see if there's a big cluster
> below a specified threshold (such as 32)? For example, this is a
> histogram
Hi -
I'm sure you've all see the blocks/splotches in dim/dark scenes - it's
especially noticeable when fades from or to black occur.
No, I'm not hot on the trail of a new filter - but the visible blocks
during dark and fade scenes is very annoying and I'm not sure
