Gray Point if you want to click in the image on a neutral area and have color casts removed.. This opens a tool area that allows you to change a number of camera settings Exposure Compe
Trang 1Gray Point if you want to click in the image on a neutral
area and have color casts removed
• Apply exposure compensation Select Show Tool Palette
2, if necessary, from the View menu Click the Apply button for Advanced Raw (D) This opens a tool area
that allows you to change a number of camera settings (Exposure Compensation, Sharpening, Tone
Compensation, Color Mode, Saturation, and Hue
Adjustment [see note at end of section]) Drag the slider or enter a value directly to the right of the slider Note that you’re not actually changing the exposure, though it will look like it What you’re doing is adjusting the linearity curve by which data is taken from the raw file and
converted to pixels If you “increase exposure” you may see noise become worse as the low values are shifted into visible range If you “decrease exposure” you may see posterizationF
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of highlight data as Capture tries to deal with fitting too few captured values into a larger portion of the exposure
• Work with dozens of other tools Color Balance, Noise
Reduction, Size/Resolution, and Vignette Control are
amongst the other tools that allow you to manipulate the NEF image directly The entire list is actually quite
impressive, though Nikon has managed to strew these tools willy nilly across palettes
Don’t worry; we’re going to go through each tool
individually, so that was just a broad sweep through what you can do
Note: Nikon Capture is not a full-featured image editing program
It has a nice set of tools that allow you to make most of the changes to how the raw sensor data is processed into an image, but it is not a substitute for a full-featured product, such as Adobe Photoshop CS2 Personally, I use Nikon Capture only for its unique tools (camera control,
interpolation of NEF images, and post-image manipulation
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Posterization: gaps in data in a tone ramp Shows as gaps in histogram
Trang 2of exposure and white balance on NEF images), and use Photoshop CS2 for almost everything else
Note: Changes you make aren’t permanent if you save your work
as a NEF file Nikon Capture saves the tool settings but doesn’t change the original data If you save your work as a TIFF or JPEG, obviously the effects of your changes are permanently embedded in the image data that’s saved
Individual Palette Tools
Since many of the help file messages in the Capture Editor are essentially “the widget tool allows you to control the widget,” I’m going to step through each of the tools one by one and try
to put a bit more meat on the table than Nikon did
First up is the Curves tool We have four primary things we
set with this tool (plus we can do the same for individual channels):
• Black point The black triangle on the bottom of this
control allows you to set what will be “black” in the output If you had used the full exposure range of the camera, it would normally be 0, but as you can see on
Trang 3this example (sand dune in Death Valley), there wasn’t much scene contrast, so I can pull the black level all the way up to 106 Normally you’ll pull the black level up to the bottom point of your histogram data You can also use the black dropper icon to set the point by sampling from the image
• White point Like the black point, but now we’re working
the right hand (white triangle) Normally you’d pull this down to just above the top of your histogram data You can also use the white dropper icon to set the point by sampling from the image
• Gamma The middle gray triangle is the gamma point,
which controls the definition of what middle gray is You don’t move this control as often as the others, but
sometimes you’ll enter a value slightly larger than 1.0 to boost midrange values on dark images You can also use the gamma dropper icon to set the mid-point by sampling from the image
• The “Curve.” The straight line that goes from the black
point up to the top of the graph above the white point doesn’t have to be straight You can click on any point on the line and then use the arrow keys on your keyboard to move that point up, down, left, or right What you’re changing is the relationship between input value and output value By default, an increase of 1 in the input value is an increase of 1 in the output value When you start changing any of the options in this control, you break that relationship and create a new one In general, many D200 images look a bit “better” with a very slight
upwards curve in the upper highlights
There are more controls and many more nuances in the
Curves control than is fitting to describe in detail on a book
about the D200 If you’re doing more than I’ve just described, you’re considerably deeper into image processing than we’ve got room for in this already long tome
Trang 4Next on our list is the Color Balance control The temptation
for novices is to use this control for image corrections because
it seems simple (brightness, contrast, red, green, blue) and sort
of mimics what they’re used to on their televisions My word
of advice: leave it closed and inactive These adjustments are crude, and there are better ways to do every one of them
Brightness and contrast are better controlled with Curves, and the colors are better handled by both Curves and the LCH setting, sometimes both
Trang 5The Unsharp Mask is next on the palette Nikon Capture
uses different values and definitions for this tool than does the
Adobe Photoshop Unsharp Mask filter (this is true for a few
other image editing programs, as well) Here’s how the two compare:
Nikon Name Nikon Range Adobe Name Adobe Range
Intensity 0-100% Amount 0-500% Halo Width 0-100% Radius 0-20 pixels
Threshold 0-255 Threshold 0-255
Example: A setting of 20%, 5%, and 0 in Nikon Capture is
approximately the same as a setting of 100%, 1 pixel, and 0
in Photoshop (If you don’t remember what each item does,
go back and re-read the section on Sharpening earlier in the eBook [see “Sharpening” on page <H328>])
I’m not a big fan of Capture’s sharpening, though some like it
a lot It definitely has a slightly different “texture” to the effect than does Photoshop’s similar tool As you’ll discover in
“Other Manipulation Tools,” I suggest that you get a
dedicated sharpening tool, as you’ll get more control over the process
Trang 6The D-Lighting tool is the replacement for DEE in previous versions of Capture (Dynamic Exposure Extender) D-Lighting
is a second way of altering exposures in Capture (Curves was the first; there will be more) In a way, D-Lighting is a
method of building a curve that deals with just the shadow area, just the highlight area, or both (Note that you have to
click the Better Quality radio button to see all the controls in
this tool.)
This control is cruder than Photoshop’s Shadow/Highlight adjustment, but still effective Usually you’ll set the Highlight adjustment to 0 and then try dragging the Shadow
adjustment control Moreover, I find that you can really only
effectively use this control for shadows or highlights, not both simultaneously (if that’s what you need to do, use Photoshop’s controls)
Without D-Lighting With D-Lighting
Note: It pays to have Curves open and visible when you’re
playing with DEE, as the histogram will be updated and provide you additional feedback
Trang 7Capture does an excellent job of resizing images, if you need that (though it only goes to 200%) Indeed, some people think that it does a slightly better job than Photoshop’s bicubic resampling First, enter the dots per inch for your printer (most inkjet users should enter 240); note that before you enter the dots per inch, you may need to change the width and height units to something other than pixels Then enter a new value
for Width or Height The Scale value will tell you how much
the image had to be scaled to meet your demand
Note: To cancel a resizing, click on the " icon for the tool and
select Reset to 100%
Trang 8The Bird’s Eye option isn’t really a control, but a
navigational tool When you’re zoomed in on an image it shows you the location of your zoom and allows you to drag the red box that shows your current location to another place
on the overall image
Information tells you the position and value of the pixel at
the current cursor position on the main image That’s useful, but there’s an even more useful ability: if you want to
compare two (or more) points, click on the crosshair icon, click on a point in the image, and now as you move
elsewhere in the image you’ll be able to see how the values differ:
A little crosshair icon is placed along with a matching number
on the image so you can remember which point is which (right-hand image, above)
Trang 9Color Booster is a saturation control, but with a bit of a difference If you select a Target Type of People, skin tone colors won’t be boosted but others will If you select Nature,
all colors are boosted
New in recent versions of Capture is Photo Effects Like a
number of Capture’s tools, it’s actually quite versatile, but not
well explained or self explanatory First, Effect allows you to
change the image to monochrome The thing that throws
some folk is that Tinted doesn’t seem to tint the image (hint:
you have to then use the color sliders at the bottom of that
tool) The top slider is Brightness, the bottom three sliders
Trang 10are the equivalent to Photoshop’s Color Saturation tool and
adjust the complimentary color spectrums (Cyan/Red,
Magenta/Green, and Yellow/Blue) Note that you can use these color sliders even if you don’t choose an effect
Egads, we’ve now got dueling brightness and color controls! That’s one reason why I suggested earlier to use a default of all tools turned off Only turn on those you use to change an
image It’s very easy to get multiple tools turned on that make
similar (or even the same) adjustment to an image, which can make it tough to make subtle adjustments
Our last tool on the first palette is Red Eye Correction.F
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You’ve got two choices: let Capture do it automatically, or click on the eyes and let Capture do it automatically The difference is that in one case you help Capture find the eyes (it might correct something small and red that isn’t an eye), in the other you trust Capture to do the right thing As good as the all-automatic version is I suggest that you always use
Click on eyes
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Okay, the UI designer in me has to make a comment When you turn this tool on it
is initially off Yep, it’s got two “off” controls It really seems like Nikon doesn’t have
a real UI designer working on this program The “wizard behind the curtain” is doing all kinds of interesting and wonderful image alterations for us, but telling him what to
do and when to undo is a lesson in disorganized user interface
Trang 11In the second tool palette, we have an additional set of options:
The White Balance tool allows you to set a color
temperature setting (and actual Kelvin value; as shown here
I’ve bumped Cloudy up a bit using Fine Adjustment) You
can also select a neutral area of your shot and use it to set white balance:
Hint: the Start button is necessary to begin the process of
selecting a pixel or pixels in the image to use as the neutral reference
Trang 12Three controls live in the Noise Reduction tool, and they all
do different things:
• Color Noise Reduction: this function is used to reduce the
colored patterns noise takes on when you use high ISO values The D200 doesn’t really produce much chroma noise, and I find this tool useful only at ISO 1600 and above
• Edge Noise Reduction: this function tries to remove noise
from distinct edges, which, theoretically, makes those edges more distinct
• Color Moire Reduction: this function only works on NEF
images and it has limited control Still, it’s worth a try if you find an image with moiré in it
But I’d generally say avoid Capture’s Noise Reduction tools
if you can The programs I mention in “Other Manipulation Tools” (see page <H707>) do a better job
Trang 13If you took a dust reference photo, here’s the tool that allows
you to use it Click on the Change button and point to the
dust reference photo you want to use This function
sometimes takes a long time to process And you’ll sometimes see the downside: occasionally you’ll get a message like this:
See: you still have to clean your sensors sometimes, folks
Vignette Control only works with NEF images Nikon
doesn’t tell us much about the Vignette Control, though
their documentation seems to imply that the control varies to correct the amount of light falloff exhibited by the lens
detected in the EXIF data Based upon my experience with it, it’s only marginally accurate at that, though it’s far better than nothing Don’t expect huge differences that are easily visible Most lenses on the D200 have far less than the 15% center-to-edge difference that would be easily visible to the naked eye
Trang 14We’ve now come to two of the more important controls
Advanced Raw is tricky, so be careful Most people turn it
on to allow post shooting exposure compensation (top
control) What they don’t notice is that the controls
underneath all say Unchanged (I’ve used my normal set here, so only Color Mode is Unchanged in the dialog I
show) It’s easy to interpret the word “unchanged” as meaning nothing will be done, but that’s not correct What it means is
that the camera setting will be used for that item So if you set
Sharpening to High on the camera, Unchanged means High! Don’t fall into that trap Indeed, this is one of the
controls where I strongly suggest that you save and load a standard set of values, as I have here
Note: If you used prior versions of Capture or also use a D1, you
need to note that the current versions of Nikon Capture show the Hue adjustment value differently than the D1 (and all versions of Capture up through 2.0) On those products, the Hues were specified as a value from 0 to 6; in Capture 3.0 and later, Hues are shown in values of -9 degrees to +9 degrees Here’s how the two equate:
Old New
Trang 15120 degrees apart (see “Hue” on page <H296>)
Our last tool is a four-parter: the LCH tool (Lightness,
Chroma, Hue)F
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This tool comes to Capture from the Nikon Scan software, where it has been available since version 3 (thus, it’s not a new tool just coded, but a mature one)
You’ll note that the Master Lightness portion of the tool looks exactly like the Curves tool Yep, it works the same way, so you already know how to use it Whereas Curves works with RGB data, LCH works with Luminance and Color
data (sort of the CIE Color Lab mode, only expressed a bit differently, as we have no A and B channels) Normally,
you’re only going to pick one or the other to use (Curves or LCH), not both, as they interact, and you can get lost in the
sub effects they have on each other
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Yes, I know I said four parts The lightness control now comes in two forms:
Overall Lightness and Color Lightness I guess no one at Nikon wanted to
rename it the LLCH tool