Chuck,
Thanks for your information, it's very helpful.
---
Michael
2009/1/4 Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
> Moose is probably asleep so I'll answer. You can find LCE (Local
> Contrast Enhancement) described on Luminous Landscape here:
> <http://www.luminous-landscape.com/tutorials/contrast-enhancement.shtml>
> It's done using unsharp mask with unlikely parameters for typical
> unsharp masking: Amount — 20%, Radius — 50, Threshold — 0
>
> But the description here (while not invented by him) actually originates
> from Thomas Knoll who is the chief author of PhotoShop and ACR so it is
> not unusual to find that it is now in ACR as well. There it is known as
> the "clarity" slider. But my view of its effect in ACR is that it's
> much subdued there relative to using the parameters above. Moose uses
> LCE on a separate layer so that he can control the strength of the
> effect with the layer's opacity control.
>
> According to Bruce Fraser and Jeff Schewe writing in "Real World Camera
> Raw with Adobe PhotoShop CS3" the clarity slider's effect can be
> simulated in PhotoShop by using unsharp mask on a separate layer with
> parameters: Amount — 15%, Radius — 100
> "Then in the layer's Blend If option (double-click the layer icon),
> select This Layer and split the highlight and shadows sliders to set the
> blend range so that shadows blend from 0/100 and the highlights blend
> from 127-255."
>
> Chuck Norcutt
>
>
>
> Michael Wong wrote:
> > Moose,
> > Thanks for your comment.
> >
> > What is LCE? Is it included in PS?
> >
> > Thanks.
> >
> >
> > ---
> > Michael
> >
> >
> >
> >
> > 2009/1/4 Moose <olymoose@xxxxxxxxx>
> >
> >> Michael Wong wrote:
> >>> http://www.fotop.net/MichaelWong/Rollei35sBW
> >>>
> >>> Although it's not very good, the first step is successful ^_^
> >>>
> >> Michael Wong wrote:
> >>> I missed the info from the website (
> >> http://www.digitaltruth.com/devchart.html ) & it recommends 9 mins
> >> developing time for Lucky 100 by TMAX developer. I made it less 2 mins,
> >> maybe it caused to low contrast :-(
> >> It's been something like 40 years since I developed a roll of B&W, so I
> >> have no idea what the short development time would do.
> >>
> >> But it's only been a couple of weeks since I scanned some B&W film. It's
> >> impossible to tell from here how much of the results is from
> >> film/development and how much from scanner, scanning software and
> >> operator settings.
> >>
> >> Using IMG3605 as an example, overall contrast is fine, in the sense that
> >> neither highlight or shadow detail is lost at the ends of the histogram.
> >> However, the image overall looks flat and lifeless, especially for a
> >> subject so busy and full of life. As I see it, the problem is at least
> >> partially in local contrast and sharpness, with lesser problems of tonal
> >> distribution.
> >>
> >> Although this is a film image originally, I am seeing it as a digital
> >> capture, since it was scanned. Possibly as a result of the development,
> >> local contrast, tonal differentiation at the edges between areas of
> >> different tonal value, is very low. Also, detail actually captured by
> >> lens and film is lost in the digital process. ALL digitally captured
> >> images need sharpening if one wishes to see all the detail. It's nothing
> >> to do with the source or the nominal resolution of the sensor/scanner,
> >> but with the nature of scanning of an analog image with a fixed grid.
> >> I've tried to explain the reason in clear, simple terms on Zone-10.
> >> <
> >>
> http://zone-10.com/cmsm/index.php?option=com_content&task=view&id=149&Itemid=1&limit=1&limitstart=1
> >> Here are a couple of versions of how I think the image "should" look.
> >> <http://www.moosemystic.net/Gallery/Others/MWong/IMG3605.htm>
> >>
> >> I first applied noise reduction, mostly so that LCE and sharpening
> >> wouldn't accentuate the grain. Then I applied LCE, Curves and
> >> Sharpening. I also did use masks, so those tools were applied in
> >> different amounts to different parts of the image.
> >>
> >> It may well be that the right film/developer combination will get you
> >> negs that will print perfectly with the right paper and darkroom
> >> technique. You will still need LCE and/or sharpening to get a similar
> >> effect on the web for scanned images.
> >>
> >> All the above assumes a desire for the kind of result I linked to. There
> >> may well be others for whom the soft, almost dreamy quality af the image
> >> as-is will be preferable.
> >>
> >> Moose
> >> --
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> >>
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