View Single Post
  #55   Report Post  
Pete C
 
Posts: n/a
Default

On Sat, 09 Oct 2004 10:56:52 +0100, Peter
wrote:


Pete C wrote

Naff in what way?


For example areas of the sky contain splodges of different shades of
blue - the sort of thing one sees in excessive jpeg compression. But
there is no compression - this is scanning direct into the app.


The banding is due to the limitations of the monitor, the speckling is
probably due to film grain. Excessive JPEG compression shows up as
blockiness, but there is none of that there.

Again, better in what way, better colours? The scanned pics there
aren't at 2700dpi resolution though, more like half of that on each
axis.


Yes, they are low res but the colours are often way off and that much
is visible even in those. The scanned slides are those where one has
the option to click on the image to see a bigger one; the others are
from a Casio Z4. The Sitia harbour pic which is particularly nice is
from the Z4.


By way off, do you mean less saturated or with a colour cast? Digital
cameras can boost the colours as part of the image post processing, at
the consumer end of the market this is more evident with Kodak cameras
than Canon.

Also digital cameras can vary the white balance so can cope with
different lighting conditions better.

There's a 5400dpi Minolta for about £460 that gets good reviews and
should get pretty much all the detail out of the slides. Scanners have
come a long way in the last few years, so this should give better
color balance than your existing scanner in any case.


I ought to try this one then. £460 is OK to buy for this amount of
stuff. Does anyone know off hand whether this comes with software
which can automatically generate incrementing filenames?


Might be worth finding someone or a scanning lab that has one and send
them a few slides with a variety of colours, lighting and exposure
levels and have them done as raw scans.

I posted a couple of 4800x2400dpi scans a little while back he

http://groups.google.com/groups?hl=en&lr=&selm=l4qnk01a507mu48dak4ic80ro7pn 1q9cnk%404ax.com

Have a look and let me know what you think.


That's an impressive pic in terms of resolution, but I cannot judge
the colour accuracy (the night lighting is sure to be coloured) or the
dynamic range.


OK there's a couple more here in daylight, one scanned from a negaitve
and one from a print.

http://www.smileypete.dsl.pipex.com/Field_from_negative.jpg
http://www.smileypete.dsl.pipex.com/Field_from_print.jpg

The one from the negative shows that scanner has less dynamic range,
being less detailed in the darkest and brightest parts of the picture.

However this is from a cheap flatbed scanner, and a mid range film
scanner would be worlds apart.

cheers,
Pete.