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This is Interesting: Free Magazines for Graphics designers and webmasters
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 09-25-04 - 12:15 PM 
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In article <414618DF.4E13E8FA@jasc.com>,
Kris Zaklika <kzaklika@jasc.com> wrote:
> Dave Symes wrote:
> Are you sure it is moiré? Are you sure you aren't capturing
> two interlaced (and therefore displaced) frames during one
> exposure? Try a shorter exposure time.
Thanks for the note Kris, I've been busy and only just got around to
trying out your suggestions.
As with Silver days we've been trying with 1/30th, 1/25th and 1/20th and
1/15th sec exposure times.
Are you sure about... "Try a shorter exposure time" that would imply
speeds more than 30th sec, whereas with telly pics the exposure time needs
to be = to, somewhere around or less than the scan rate.
(In photography shorter exposure time = Faster shutter speed, 1/125 is a
shorter exposure time than 1/30) ??
[Snip my bit]
> Try defocusing the camera a little. That's a standard trick
> for reducing moiré, if moiré is what you have.
[Snip]
Mmnn! interesting thought, I've now tried that, but to get rid of enough
moire/interference I have to defocus so much, that the image really is of
no use afterwards.
We've come to the conclusion that the problem originates from two things.
1) The image problems are made worse by the CCD and and screen
scan/pixelation interference patterns.
2) Modern CRT tubes don't give as good an image as they used to.
We've tested this one out by digging out the old camera to take a roll of
silver as a comparison, and comparing them with the same images taken in
the late nineteen eighties.
Notably better than the Digital camera images, but not as good as those
taken in the late Eighties... Same camera, same film type, same house, but
different modern TV.
So unfortunately the best answer ATM is continue with the Silver
photography, then put the negs through the Minlota film/slide scanner we
have.
I suppose another solution would be the one suggested by Bob G "Frame
capture from a video card", unfortunately I don't have one, and it's a
subject about which I know very little, apart from the basics.
But thanks for your thoughts.
Cheers
Dave S
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09-26-04 - 12:18 AM
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In article <ooidnQbMqMgMVsjcRVnytQ@pipex.net>,
Trev <trevbowdenATwireless.pipexDOTnet> wrote:
[Snip]
> When you can get a Pinnacle pctv card for £28 I would have given up
> struggling by now
But then again, it's through struggle we learn.
Yes there are a number of TV/Video cards that would do the business, and I
might go down that path eventually, but first, because I'm a Grumpy,
cussed old B, I'm going to experiment fully with the gear I've already got.
Cheers
Dave S
PS: Three people I've had personal contact with, regarding Cards, say
don't touch Pinnacle products with a barge pole... (Well they actually
used the excrement epithet).
Personally, never used any of their products so I wouldn't know.
D.
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09-26-04 - 12:17 PM
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"Dave Symes" <dfs@ukgateway.net> wrote in message
news:4cf4265611dfs@ukgateway.net...
> In article <ooidnQbMqMgMVsjcRVnytQ@pipex.net>,
> Trev <trevbowdenATwireless.pipexDOTnet> wrote:
>
> [Snip]
>
>
> But then again, it's through struggle we learn.
>
> Yes there are a number of TV/Video cards that would do the business, and I
> might go down that path eventually, but first, because I'm a Grumpy,
> cussed old B, I'm going to experiment fully with the gear I've already
> got.
>
> Cheers
> Dave S
>
> PS: Three people I've had personal contact with, regarding Cards, say
> don't touch Pinnacle products with a barge pole... (Well they actually
> used the excrement epithet).
>
> Personally, never used any of their products so I wouldn't know.
> D.
I have a pinnacle dc10 analogue in and out along with Studio 8 edit suite.
I have had no problems. I also have a 7 year old avermedia TV card working
well thought win 98 then XP. I have herd the same stories but then I dont
have a problem opening tif or tiff's either
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