On Mon, 31 Dec 2007 16:11:53 +0000, BGN
wrote:

Wow, I feel your pain. Perhaps you can source a better quality 1080
test card from somewhere else.

I think the BBC's Test Card W is available as a .gif from somewhere in the BBC
Commissioning Information section of their website, only I can't locate it ?

http://www.bbc.co.uk/commissioning/t...turesize.shtml

Hmm, that's not HD rez, but over the next couple of days when I've got
a few spare moments I'll work on creating a custom 1080(p) High Def
based on tests for LCD panels.

Of course, it's not going to be created to any particular
specification but will feature gradients, colour contrast and perhaps
even an inversion test or two (which will be handy for 1080i peeps.

I'll post the results when I've made something useful.

Scrub that, I can actually rescure the SkyHD test card and make it
pixel perfect, with *no* blurring at all but it's going to be a very
manual process, but at least it'll remove all of the broadcast
artifacts and MPEG compression.

Recolouring by hand, what fun!

After spending a few hours re-drawing their card I'm this far in:

http://www.bgn.me.uk/TestCardInProgress.png

The inset image is a progress chart - the covered in blue have been
redrawn and recoloured meaning that the lines are now one pixel wide,
no anti aliasing or anything like that - sharp pixels.

I'll do a bit more tomorrow then tackle the pipe lines.
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On Mon, 31 Dec 2007 21:04:21 +0000, Paul Martin wrote:

The inset image is a progress chart - the covered in blue have been
redrawn and recoloured meaning that the lines are now one pixel wide,
no anti aliasing or anything like that - sharp pixels.

Even the new BBC test cards are anti-aliased. I've heard rumours of an
HD version of Test Card W.

I think I'll start pixel perfect and peraps add a tiny gausson blur if
I think it needs it.
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On Mon, 31 Dec 2007 21:33:40 +0000, BGN
wrote:

The inset image is a progress chart - the covered in blue have been
redrawn and recoloured meaning that the lines are now one pixel wide,
no anti aliasing or anything like that - sharp pixels.

Even the new BBC test cards are anti-aliased. I've heard rumours of an
HD version of Test Card W.

I think I'll start pixel perfect and peraps add a tiny gausson blur if
I think it needs it.

Another update...

http://www.bgn.me.uk/TestCardInProgress2.png

Those annoying vertical lines are now exactly as they should be, the
first set is now one pixel black, one pixel white then two pixels
black, two pixels white... until the largest set.

Everything that touches the edge of the image is now redrawn and
recoloured and is currently sharp to one pixel, no anti-aliasing. The
gradients in each corner have been colour matched and re-gradiented to
get rid of the MPEG compression and I really must remove the one pixel
wide lines from the bottom set of colours which I keep forgetting to
do.

All in all it's looking quite good just needing something to be done
to four circles. I can't be arsed to sort out the grey boxes, there's
no need to have them uber-sharp.

Any other suggestions before I finish it off?
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On Tue, 1 Jan 2008 03:07:03 +0000, Paul Martin wrote:

Those annoying vertical lines are now exactly as they should be, the
first set is now one pixel black, one pixel white then two pixels
black, two pixels white... until the largest set.

So you've made the frequency sweep square waves instead of sine waves?

The SkyHD test card had lines on it, not sine waves. )

The original transparency test card F had square waves, but the digital
one had sine waves, as do cards J and W.

The SkyHD test card isn't the original test card F, J or W.
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