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Repairing
Photographs
Adobe Senior Creative Director
Russell Brown shows you how to repair your
digital images with Adobe
®
Photoshop
®
ADVANCED
Digital
In this demo, we will repair a photograph taken with a low-resolution
digital camera—in this case, the Kodak DC50. Often these cameras
produce excellent results, but they have a few deficiencies that can be
repaired digitally using layers. This technique is also quite useful for
repairing badly scanned images.
REPAIRING DIGITAL PHOTOGRAPHS, PART 1
1.
Open your digital image
file in Photoshop. Zoom in
on the image and take a close
look at the problem areas,
especially noting the skin
tone in this image.
Preferences
For this demo, we
chose Preferences >
Display & Cursors, and
selected. Brush Size
and Precise.
2.
Go through the RGB
channels. Press Command/
Ctrl+1 for the Red channel,
Command/Ctrl+2 for the
Green, and Command/
Ctrl+3 for the Blue channel.
Notice the artifacting and
extra noise in the Blue
channel. The Blue channel
is the telltale channel of a
scanned image and often will
show the errors of the scan.
Blue channel
The CCD (Charged
Couple Device) in
the camera is least
sensitive to the blues,
and it is more difficult
to interpret those colors.
Also, when you capture
an image with a digital
camera, it’s compressed
with JPEG compression.
The combination of
these two factors
creates noise in the
blue channel.
3.
Zoom out of the image
and return to the RGB
composite. Here’s how to
easily fix this image using
Photoshop layers. Duplicate
the Base Layer by dragging it
onto the New Layer icon at
the bottom of the Layers
palette. Double-click this
new layer and rename it
Color Blur.
Shortcuts
Throughtout this docu-
ment, “Command/Ctrl”
means Command on the
Macintosh
®
and Ctrl on
Windows
®
. “Option/Alt”
means Option on the
Macintosh and Alt
on Windows.
2
REPAIRING DIGITAL PHOTOGRAPHS, PART 1
4.
Choose Filter > Blur >
Gaussian Blur. Choose values
based on the resolution of
the image. You want to soften
the image—not lose the
image completely, but soften
it—especially in the troubled
area of the blue channel.
5.
With the Color Blur layer
still targeted, create an
overlay of the two layers
using Color mode from the
pop-up menu in the Layers
palette.
Color mode
Colors are overlaid on
the existing pixels while
the highlights and
shadows of the base
color are preserved.
The base color is not
replaced, but is mixed
with the blend color to
reflect the lightness and
darkness of the original.
6.
Zoom in to the image
and look at the same area.
Press Command/Ctrl+3 to
go to the blue channel again.
See how the noise has been
smoothed out. Amazing but
true! But wait, there’s more...
3
REPAIRING DIGITAL PHOTOGRAPHS, PART 1
7.
Let’s continue working
with this image and give it
more of a portrait look by
softening the focus of the
image, as if it were shot
through a special filter.
Duplicate the Color Blur
layer by dragging it to the
New Layer icon, and then
double-click the new layer
and rename it Soft Focus.
8.
With the Soft Focus layer
targeted, change the mode
back to Normal and set
opacity to 30%. This creates
a nice soft look around the
edges of the image, especially
the face, hair, and hat areas.
Opacity Tip
When a selection tool
is active, pressing any
of the numeric keys
changes the opacity
to the corresponding
percentage. Press 1 for
10%, 0 for 100%, and
so on.
9.
The eyes are also being
softened, which is not
something we want, so we
will create another layer to
sharpen parts of the image.
Duplicate the original Base
Layer, and then move it to
the top (above the Soft Focus
layer). Name this layer
Sharpen Details.
4
REPAIRING DIGITAL PHOTOGRAPHS, PART 1
10.
Create a new layer by
clicking the New Layer icon,
and then move it to the
bottom of the stack. Option-
click the eye icon for this
layer, and then choose Select
All and fill the layer with
white. Deselect. This new
layer is needed only to
preview the effects of blend-
ing layers—which you are
about to see.
Fill shortcut
Pressing Option/Alt+
Delete fills the area
with the foreground
color. Pressing
Command/Ctrl+Delete
fills the area with the
background color.
11.
Click the eye icon for
the Sharpen Details layer so
that only the bottom and top
layers are visible. Target the
Sharpen Details layer.
12.
Now we will isolate the
areas of this layer that need
to overlay the image. Double-
click the layer to bring up the
Layer Options dialog box.
Make sure Preview is checked.
Move the This Layer high-
value range slider (white
triangle) to the left. Notice
that areas of the face and hat
are being eliminated.
Blending Layers
The sliders here let you
define which pixels are
blended by indicating
a range of brightness
values for the replace-
ment pixels. In our
example, the highlight
range was split to
soften the layer, giving
it a semi-transparent
and fogged look. The
further apart the
triangles, the softer the
appearance of the layer.
5
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