The Art History Brush examines the colors and general geometry of the scene as it existed at a point on the History panel, and then randomizes the original colors, using geometric variat
Trang 1192
Use the Art History Brush
The Art History Brush, as its name suggests, makes somewhat stylized artwork out of photographs, based on a state (a point in time) you find on the History panel The Art History Brush examines the colors and general geometry of the scene as it existed at a point on the History panel, and then randomizes the original colors, using geometric variations you set using the Style presets
on the Options bar drop-down list Further randomization and modification
is achieved through the Painting Area slider, which determines the size and number of individual strokes the brush applies, Tolerance slider, which when set at 0 enables you to modify the entire image, while setting it at a higher value increases the tolerance so that some strokes may not result in a change, and the Opacity and blending Mode To get the best artistic effect using this brush, use the following points as recommendations:
• Apply a filter to your original image, ideally one that creates a lot of pleasing color changes in your photo Because the Art History Brush doesn’t change original colors, the filter can add a dramatic modification to the original Bas Relief, Water Paper, and even Image | Adjustments | Gradient Map can prep your work well for the Art History Brush, as shown in Figure 8-12
• Choose a tip for the Art History Brush that has some texture, and possibly some Jitter in it The Chalk 44 Pixels tip in the default collection of Brushes can serve you well; you add texture as you add abstraction
• Set the History panel (click Window | History) to an early point in the changes
you make by clicking the box to the left of the state’s title You can use the original image, or a state between multiple filter applications
• Work a little with one style, then change styles as a specific area calls for it Use your artistic eye The Tight Long style actually works well in Figure 8-13;
a combination of the right filters, the right History state, and not overdoing it can result in an eye-pleasing variation on your photographic work
USING THE DODGE, BURN, AND
SPONGE TOOLS (Continued)
3 In the Options bar, click Flow to control how
fast the Sponge tool decreases or increases saturation
4 In the Options bar, specify the values in the Brush
Size, Brush Tip, and Strength fields.
5 Drag the tool over the area you want to touch up
Figure 8-12: The original image with and without
a filter before the Art History Brush is applied.
Find the image state in the History panel that you want
to paint Click the Set Source For The History Brush
Original
192 Photoshop CS4 QuickSteps Making Local Adjustments with the Tools Panel
Trang 2193
Crop a Photo with the Crop Tool
Use the Crop tool to trim an image to the desired size You can make a freehand selection, or you can specify the resolution and size of the area to which the tool will crop.
1 Open the image you want to crop and click the Crop tool
2 Drag diagonally inside the image to define the size of the cropped image Photoshop displays a cropping rectangle inside the image Eight sizing handles appear on the perimeter of the rectangle, as shown in Figure 8-14
3 If the cropping rectangle is not sized as desired, do one of the following:
• Drag a corner handle to resize the width and height of the cropping rectangle Press
SHIFT to resize proportionately
• Drag the middle handle on the left or right border to change the width of the cropping rectangle
• Drag the center handle on the top or bottom border to change the height of the cropping rectangle
• Drag inside the cropping rectangle to move it to a different position
• Drag outside the cropping rectangle to rotate it in a free-form manner
4 Press ENTER or click the Commit button on the Options bar to crop the image.
Figure 8-13: You can create stylized artwork by painting
inside an image with the Art History Brush.
Figure 8-14: Adjust the cropping rectangle to the desired size.
193
Trang 3194
Create Vector-Shaped Shapes
You can use the Shape tools to add vector-based shapes to a document Shapes act
as masks for pixels on a layer, which can be modified when converted to vector paths You also have the option not to draw vector shapes on layers at all, but instead to draw shapes as paths and also as an ordinary collection of pixels—you click one of the option buttons for shape creation at the left of the Options bar when the Shape tool is selected.
Use the Shape Tools
You have six Shape tools from which to choose: Rectangle, Rounded Rectangle, Ellipse, Polygon, Line, and Custom Shape You specify the settings for each tool in the Options bar (see Figure 8-15) For example, when you create a shape using the Rounded Rectangle tool, you can specify the radius of the rectangle’s corners When you select the Custom Shape tool, you can select a preset shape.
Here is how you use the Shape tools:
1 Select one of the Shape tools.
2 In the Options bar, click one of the following buttons to define the type of shape:
• Shape Layers Creates a shape on its own layer You can create shape layers with
Shape tools or Pen tools Shape layers are often used for creating graphics If you look at a selected shape layer in the Paths panel, you’ll find that it contains both a fill layer with the shape color and a linked vector mask defining the shape path
Figure 8-15: The Shape and Pen tools Options bar has features for customizing the way you add
predefined geometry to a composition.
Tool
Custom Shape tool
Blending modes Polygonal
tool
Smooth edges
Paths creates
a working path
Pen tool and Freeform Pen tool
Shape Layers creates a shape with a vector mask
Fill Pixels creates a rasterized (bitmap) shape
Line tool Radius for
rounded corners
Opacity or transparency Rectangle tool
and Rounded Rectangle tool
TIP
When you use a Shape tool, hold down the SHIFT key
while dragging to create a rectangle or polygon of equal
width and height or to create a circle
194 Photoshop CS4 QuickSteps Making Local Adjustments with the Tools Panel
Trang 4195
• Paths Creates a working path that can be used to make a selection, create a
vector mask, or fill or stroke the path with a color or a gradient You can create raster graphics with paths, and you can save them
• Fill Pixels Creates a rasterized (bitmap) shape The shape is not vector-based,
but as you paint, the pixels in the image are changed
3 If you have selected the Fill Pixels option, specify the Mode, Opacity, and Anti-Alias
options for the shape you are about to create The Anti-Alias option prevents jagged edges at the border of the shape
4 Specify other options for the shape you have selected—they vary
5 Click the down arrow on the Options bar next to the Custom Shape tool icon to reveal
a menu that enables you to specify geometry options for the tool Here you can see the options for the Rounded Rectangle tool Note that you can specify the exact size
of the shape
6 Drag diagonally inside the document to create the shape If you’ve specified the size
of the shape, click inside the document
Edit Shapes
If you create a shape using the Shape Layers or Paths option, you can edit the shape by adding, converting, moving, or deleting points, as outlined in Chapter 5:
1 Select the Direct Selection tool.
2 Select the shape you want to edit to reveal the points used to create the shape
3 Select the applicable tool to edit the points as needed
When a path is selected with the Path Selection tool or Direct Selection tool, all anchor points are displayed.
CONVERTING PATHS
You can create an intricate path with the Pen tool and
then convert it to a selection Trace the shape you want
to select, and then convert it to a path:
1 Select the Pen tool from the Tools panel, and
click it around the shape you want to select,
creating a path
2 Click Window and then click Paths The Paths
panel is displayed
3 Click the Options button in the upper-right area
of the Paths panel, and click Make Selection.
4 In the Make Selection dialog box, select these
options:
• Create a feathered effect by entering the
Feather Radius in pixels.
• Click Anti-Alias to smooth the selection edges.
• Click New Selection to create a new selection;
click Add To Selection to add to an existing
selection; click Subtract From Selection to
decrease an existing selection by this new one
being defined; or click Intersect With Selection
to create one selection with the intersecting
points on the new selection being defined
5 Click OK.
195
Trang 5This page intentionally left blank
Trang 6How to…
Preparing Vintage Pictures
for Scanning
• Straighten a Scanned Photo
• Crop Away Superfluous
Photo Areas
• Improve Image Focus
• Remove Dust and Scratches
• Use the Smudge Tool
• Fix Flash Reflections
Using Quick Mask to Paint
Selections
Editing an Old B&W Photo
in RGB Mode
• Put a Smile on a Face
• Remove a Family Member
in Front of a Different One
Making Fixes when Areas
Shouldn’t Be Mirrored
• Reveal Hidden Detail
• Even Out the Overall
Photo Tones
• Remove the Color
• Remove Red Eye
Chapter 9
Restoring and Repairing Images
For a lot of us, Photoshop and digital photography came a little too late for us to archive everlasting digital photos of our parents, grandparents, and other loved ones Fortunately, if you still have a snapshot and read Chapter 2 on scanning (and have access to a scanner), you not only can archive your heirloom photos, but also make significant improvements
to their appearance This chapter shows you how.
Repair a Photograph
Figure 9-1 shows a good example of a bad image In addition to the poor scan, which includes dust and a crooked baseline, the original photo suffers from flash photography fall-off and soft focus, and the years haven’t improved the photo either If you have a similar photograph, the following sections take you step by step through the Photoshop remedies that will cure this valuable heirloom image.
197
Trang 7198
Straighten a Scanned Photo
Although it’s best to get a scan straight in the scanner, a slight crookedness can happen sometimes To straighten a crooked photo:
1 With the image open in the workspace, click the Layers panel on the docking strip to
open it
2 Double-click the layer thumbnail The New Layer dialog box opens, shown in Figure 9-2,
asking you to name the new layer; accept the default name and click OK You’ll notice
that the layer titled “Background” is now renamed and it no longer has a locked icon on
it This means it can be rotated now
3 Press CTRL/CMD+R to display the rules, and then drag a guide out of the top ruler to the top edge of the photo, and then drag a guide from the left ruler so that it meets at the upper-left corner of the photo You’ll want to zoom into the corner before you add
QUICK FACTS
PREPARING VINTAGE PICTURES
FOR SCANNING
Although you probably know how to use your scanner,
there are a few things to consider before you scan your
one-and-only 1928 photo of your grandmother:
• Without ruining them, try to clean your precious photos as thoroughly as possible The less garbage on a photo, the more detail is revealed for scanning, and the less work is required to restore the photo Take the photos out of glassine holders;
don’t scan through a surface but instead scan the photo itself Additionally, remove any photo corners—anything that increases the height of the photo will prevent the lid of the scanner from closing completely, letting light leak into your scan
A scanner is a camera in many ways; remember what happened to a roll of film in your old camera when you didn’t close the back completely?
• To wipe photographs (don’t use fluids of any kind that might melt the photo emulsion), buy a pack
of lens-wipe cloths from the photo supply store
Specially treated cloths have antistatic properties, helping to remove lint and dust, and these cloths are made of long-fiber fabric, the type that doesn’t leave fibers as you clean
• Clean the platen—the glass plate above the
scanning mechanics that you rest the photos on
Use a long-fiber cloth; don’t use paper towels,
which are short fiber and shed all over anything you wipe It’s up to you whether to use glass cleaner Typically, the platen doesn’t have a special coating, but if you use window cleaner, make sure you don’t leave streaks, and that the platen is completely dry before scanning
Continued
Scratches
Dust
Flash fall-off
Sepia aging
Baseline is crooked
and the scan was performed ineptly.
198 Photoshop CS4 QuickSteps Restoring and Repairing Images
Trang 8199
the guides; you can use your mouse scroll wheel to zoom—push the wheel toward your screen and away from yourself to zoom in
Drag from ruler
QUICK FACTS
PREPARING VINTAGE PICTURES
FOR SCANNING (Continued)
• Get an inexpensive measuring triangle (try the
stationery department at the supermarket) to
ensure that the photo you place on the platen is
parallel to the platen This isn’t always possible if
one of your ancestors got creative and trimmed
the photo with a fancy border, but if it’s just a
rectangular photo, try to ensure that it’s at a
perfect 90° angle to the platen Photoshop can
rotate a photo, but rotation changes the original
pixels in the picture and inevitably degrades
image quality
• If your scanner supports it, scan at 48 bits
instead of the usual 8 The more scanned visual
information you have, the easier it will be to
precisely restore the photo Also, scan at a high
resolution such as 600 pixels/inch If the result
is a 25MB file, that is completely okay; restoring
vintage photos is time consuming and should be
done only once, on a high-resolution copy
more of Photoshop’s editing features.
199
Trang 9200
4 Press CTRL/CMD+T to put the layer photo into Free Transform mode and then drag the center of rotation icon in the center of the bounding box to the point where your guides meet
5 Hover over a corner bounding box handle until it turns into a bent-arrow cursor and then drag until the bottom of the photo is aligned with the guide, as shown in
Figure 9-3 Then either click Commit Transform (the check icon on the Options bar) or
press ENTER to finalize the rotation
Crop Away Superfluous Photo Areas
Cropping a photo is simple: click the Rectangular Marquee tool, drag a selection, and then click Image | Crop However, judging where to crop,
what remains, and what you crop away is an artistic call Remember: the more excess you trim from your work, the less retouching you’ll need to perform This means, for example, a distracting painting on the wall, a lamp, and even
a family member who is partially out of frame and as such unrecognizable.
200 Photoshop CS4 QuickSteps Restoring and Repairing Images
Trang 10201
Here’s a creative decision you might need to make; the little girl on mom’s lap is partially out of frame However, the picture (not the family itself) would benefit
if the girl was cropped out:
1 Click the Rectangular Marquee tool and drag an area that includes what you want
shown in the finished photo If necessary, to reposition the marquee, drag inside the marquee Pull guides from the rulers if you want to previsualize the crop
2 Click Image | Crop.
3 Click File | Save As, and then save the image to a folder using a name other than the
original Choose PSD as the file format
Restore a Photograph
Now that the scan itself looks better, it’s time to concentrate on improving the visual content of the scan, the photograph The following sections walk you through various features in Photoshop used to enhance what your family remembers in the photo, but can’t see due to hidden and missing image details.
TIP
If a family member is out of frame, it’s more than possible
the family has a separate photo of the missing member
you can composite into the family photo
201