Could be so, in fact I hope so.
I stopped talking pictures since January, around the days of the last
TOPE I very slowly started again.
Faced Vuescan, trying to translate how does it present the figures,
especially 'curve low' and 'curve high'. It seemed that I had almost
understood it, but when scanning this one I was in fact only
experimenting.
I can explain only some of the results:
1- Chuck: No, I didn't use a black backgound, neither is it completely
due to light fall-off 'though I took it into account when making the
picture: it was -1/3. In spite of this, if you transilluminate the
Provia strongly enough, there's a lot of background detail. I adjusted
the 'curve low' figure in Vuescan but they remained fairly visible.
Adjusted Levels in PS (the histogram in Vuescan and CS3 don't match,
despite they're both set for aRGB) and the background darkened a
little more, but still visible.
2- regarding the use of only one T32 mixed with very little ambient
light, there might be at least two issues to take into account: a) the
flower is not completely opaque, it lets flashlight go through its
petals and difusses it into countless directions. b) the raindrops are
reflecting light, not only the big raindrops but the whole wet
surface. c) there was, in fact, some ambient natural light which
served as 'fill'.
3- as for sharpness: a) the T32 covers a 24mm fov (yes, it does ;-) )
and I was using a 135mm fov; b) during post processing, and this
puzzles me, the 16 bit .tiff was sharp but not cracking-sharp. I had
sharpenned using NI setting 'reduce noise and sharpen slight out of
focus image setting' and then, just for fun used Intellisharpen at a
small amount: 10% but 75% 'sharpen small detail'. I felt happy with
the resulting .tiff, and background detail was preserved.
Then, I downsized to 1280 using SI2, still at 16 bit in aRGB, worked fine.
Then converted to sRGB, then to 8 bit, finally to .jpg. And it cracked
sharp, without artifacts. Backgound detail became barely visible, but
if you let the monitor to warm up enough and look at it into a dark
environment and view it on black, it's still there.
Furthermore, untill recently Flickr allowed me to upload at 1280, but
it's now resizing to 1024 no matter what I do (should I go "pro" ;-)
).
Thanks all who looked and commented.
Further thoughts are welcome.
Fernando.
2010/6/30 Ken Norton <ken@xxxxxxxxxxx>:
>
> It looks like you may be finally gotten
> your scanning process down.
>
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|