Re: Scanned slides blue

On Sat, 02 Feb 2008 07:46:07 GMT, "Mike Russell"
<RE-MOVEmike@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

"tony cooper" <tony_cooper213@xxxxxxxxxxxxx> wrote in message
news:qim7q3hi3l5vr6ut1jvs2krr68g3l8ka8u@xxxxxxxxxx
I'm in the process of scanning 100s of slides of family pictures taken
between 1964 and 1979. Most were taken on a Konica 35mm rangefinder
camera. I'm using a Minolta Dimage Scan Elite (dedicated slide/film
scanner).

Most of the images either scan in with decent color or can be tweaked
with Curves to have decent color. "Decent" because some of the slides
have faded, some of the pictures were not taken in the best of
lighting, and the Konica didn't have any setting to change other than
f/stop and/or speed. Most were taken with ASA (not ISO in those days)
200 Daylight film if I remember correctly.

I'm sure it was ISO then too - we just didn't know it.

When there are problems, they are in two areas:

1. A blue cast in the entire picture. The blue you get when the
white balance in a modern camera is set for sunlight and you shoot
under incandescent. The "cold" blue. I've been fixing this -
somewhat - by adjusting Curves in the Blue channel, but that's
hit-or-miss.

Slides tend toward a bit toward blue anyway because they are color corrected
for a tungsten projector lamp.

That answers a question unasked. When I view the slides using my
Kodak Carousel I don't notice the blue cast. When I scan them into
PS, I do. I thought the blue cast was being added in the scanning
process.

Thanks for the other suggestions.

http://i48.photobucket.com/albums/f244/cooper213/flowerman.jpg is
straight from the scanner (except I scan in .psd and this has been
changed to a .jpg). With just a slight tweak in Curves Blue Channel I
can make the colors much better with the granite looking gray instead
of blue-gray. The tweak makes the green mat on the stand a bit
garish, but that could be the actual color.

This must be the blue cast that the color correction puts in. This
one is easy to work with. Some are more difficult because the tweak
changes things that shouldn't be changed. I can't take the time to
mask and re-tweak with so many slides.

http://i48.photobucket.com/albums/f244/cooper213/irelandmilk.jpg is
also straight from the scanner. This one I can correct in two steps:
a tweak in Curves RGB setting the white point and then a tweak in the
Blue Channel to change the window frame and walls. The result is
pretty close to what I actually remember of the colors.

Both of these are slides from a 1969 vacation...the first in London
and the second in Ireland.

The only thing I don't understand - but it doesn't really make a
difference - is why these two pictures (and many like them) came out
with a blue cast (stronger in the milk bottles) but most of the
pictures require no adjustments at all. In some I might tick Levels a
bit to brighten them up, but straight from the scanner would be OK.

I'm not putting up any images where I'm in the picture. The guy in
those pictures taken in the late 60s and early 70s doesn't look like
me. He had a 29 inch waist. The current version has a 38 inch
waist.







--

Tony Cooper - Orlando, Florida
.

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