From my post of earlier this morning. It should make clear (especially
if you view the PhotoShop example video) that "emulated color filters"
(as you call them) must be applied to a color image in post-processing.
The color image can be RAW or JPEG but best results will be achieved
using the RAW file. It cannot be done with a B&W JPEG either in-camera
or in post-processing since all color information has already been
discarded. Also note that when doing a B&W conversion from a RAW file
or any other type of processing on a RAW file that the data you're
working on is 16-bit RAW file data. It it not yet a JPEG and may never
be a JPEG. JPEG is only one form of possible output.
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Unfortunately, I do not know how to do this in Olympus viewer (and am
not about to try to learn it there) but in ACR you
1) Switch to the HSL/Grayscale panel
2) Click the Convert to Grayscale option
At this point ACR does a default conversion to grayscale but presents
you with 8 color sliders that allow you to vary the luminance of the
reds, oranges, yellows, greens, aquas, blues, purples and magentas that
are still present in the underlying color image. Moving these sliders
has the same sort of effect as using color filters in B&W photography...
except that you're dealing with a positive rather than negative image.
For example, using B&W film you might use a yellow, orange or red filter
to darken the sky and add contrast to the clouds. When dealing with the
positive color digital image you would reduce the luminance of the
blues. Likewise, if you wanted to darken or enhance the foliage you
would use the green luminance slider. No need to understand and use
complementary colors. See the example video (first one on this page)
<http://helpx.adobe.com/photoshop/using/convert-color-image-black-white.html>
Using B&W conversion of raw files one does not need to use glass filters
at all except for the case of polarizers, UV filters, ND filters and IR
filters with IR film. For color filters as normally used with B&W film
you can discard them all. Conversion from raw files gives you much more
control without the disadvantages (cost and image quality) of glass
filters. Color balance controls will also allow you to get rid of all
those pesky and expensive CC filters used in commercial film photography.
Chuck Norcutt
On 6/15/2014 11:10 AM, Chris Trask wrote:
Okay, I finally got my morning backlog taken care of and I've looked
at this page. I pretty much understood most of this, but there is
still some ambiguity as to the matter of the emulated colour filters.
The question remains as to if they are applied when you shoot the
photo or if they are applied when doing the RAW to JPEG conversion.
My earlier experiments when shooting in JPEG B&W gave me the
impression that they were NOT being applied at that level.
Chris
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