Sử dụng photoshop cs5 part 13 doc

Using the Adjustment Brush Unlike settings chosen in the Camera Raw tabs, which apply to the overall photo, the Adjustment Brush lets you apply local adjustments to specific areas.. Sav

Adding a grain texture

In the world of traditional film stock, the faster the

speed, the larger and more apparent the grain By

using the Grain controls in Camera Raw, you can

simulate this grainy texture Pick a photo that won’t

suffer aesthetically when its details lose definition

To add a grain texture to a photo: ★

1 Click the Effects tab, and double-click the

Hand tool to fit the image in the preview.A

2 Under Grain, to control the amount of grain

applied, choose an Amount value of around 50

to make the grain noticeable

3. To emulate the fine grain of a slow film speed or

the coarser grain of fast film speed, do as follows:

Raise the Size value for the size of the grain

particles.BWhen this value is greater than 25, a

small degree of blurring is also applied, to help

blend the grain with the imagery

Lower the Roughness value below the default

value of 50 to produce a more uniform grain;

or raise it to produce an uneven, coarse grain.C

Zoom in to examine the grain, then readjust the

Amount value, if needed

C We changed the Amount to 75, the Size to 60, and the Roughness to 65 The coarser grain (increased Roughness) further unifies the highlights and background with the food textures Please pass the Parmesan…

B The first settings we chose were Grain Amount 50 and

Size 80 (the Roughness control was left at the default

value of 50) The food textures are starting to blend with

the soft background

A This photo will be a good candidate for the Grain effect in Camera Raw, because it con-tains soft, muted colors and the details don’t need to stay crisp.

Using the Adjustment Brush

Unlike settings chosen in the Camera Raw tabs,

which apply to the overall photo, the Adjustment

Brush lets you apply local adjustments to specific

areas For example, you could adjust the exposure,

brightness, or color saturation of a few key details

that you want to emphasize in a composition You

draw brush strokes in the preview to define which

areas are to be adjusted, then you apply the

correc-tion by adjusting the sliders If most of the sliders

for this tool look familiar, it’s because they’re like the

ones in the Basic tab

To apply Adjustment Brush edits:

1 After making adjustments in the Basic and Tone

Curve tabs,A click the Adjustment Brush (K)

The sliders for the tool display You will paint over specific areas to mask them first, then adjust the sliders for those masked areas

2. To “zero out” all the sliders except one to make the tool operational, click the + or – button for one of the sliders

3 Choose a Feather value of 60–95 to allow the

edits to fade into surrounding areas Set the Flow

to 50 (for the smoothness of the stroke), and set

the Density to 60 (for the level of transparency

in the stroke)

4 Check Show Mask (Y), adjust the brush size by

pressing [ or ], then draw strokes over the areas

of the photo that need adjustment.B A tint covers the areas that you apply strokes to

➤ The brush size is represented by the solid circle in the pointer, and the feather value is represented by the black-and-white dashed circle

A The original photo is lit evenly We want to apply local

expo-sure edits to lighten and darken some of the areas in the center.

B On the Adjustment Brush panel, we clicked New, zeroed out the sliders,

then applied strokes to mask (mark) the areas to be darkened.

Because Show Mask is checked, we’re able to see where the mask is being brushed on.

Continued on the following page

5 Uncheck Show Mask, then move the various

slid-ers to apply adjustments to the masked areas.A

6 To apply an adjustment to another area of the

photo, click New, then repeat steps 2–5 (A–B,

next page)

➤ To edit an existing adjustment, click one of the

pins that marks the first location you clicked

(a black dot appears in the pin), then add to the

mask and/or change the slider settings

➤ To show or hide all the pins, press V or check or

uncheck Show Pins

To remove Adjustment Brush edits:

1 With the Adjustment Brush tool selected (K),

check Show Mask (Y) to display the current mask.

2 Do either or both of the following:

To remove adjustments locally, click an existing

pin, click the Erase button, then apply strokes

where you want to erase the mask

To remove an entire pin and its adjustments, click the pin, then press Backspace/Delete

➤ To remove all Adjustment Brush tool edits and reset the mode to New, click the Clear All button

USING THE AUTO MASK OPTION WITH

THE ADJUSTMENT BRUSH

To mask a specifi c color area, zoom in on it,

check Auto Mask, scale the brush to cover

only that area, and start a stroke with the

Adjustment Brush over that color The mask

will cover only the areas that match that

specifi c color We used this method to limit

an exposure adjustment to the yellow of the

fl owers shown at right

A Our adjustment settings (shown at right) slightly darkened the shadow

area around the food in the center.

B We added one last pin, which we used to desaturate the red berries at the bottom of the

photo Because the berries are now subdued, the food and flowers in the center command

more attention.

A We clicked New again, then masked the food and yellow flowers in the center

We applied a lightening adjustment to the masked area, using the settings

shown at right We also clicked the color swatch and chose a yellow tint for the

lightened areas.

4 From the Type menu, choose Heal to blend

source pixels into the texture and luminosity

values of the target pixels or Clone to copy the

source pixels exactly without healing

retouching effect You can also drag the edge of either circle to resize both of them simultane-ously, or add more circle pairs to correct other blemishes To hide the circles, press V or choose

a different tool

➤ The retouching circles will remain available even after you click Done or Open To redisplay them, choose the Spot Removal tool To remove

a selected pair, press Backspace/Delete, or to remove all pairs, click Clear All

Retouching a photo

The Spot Removal tool can be used to remove

blem-ishes or other imperfections, such as spots caused

by dust on the camera lens

To remove blemishes or spots:

1 Choose the Spot Removal tool (B), and

zoom in on the area to be repaired

2 Position the pointer at the center of the area

that needs repair, then drag outward to scale

the target circle so it surrounds the blemish

A (the Radius slider will readjust) When you

release the mouse, a green and white source

circle appears (which is linked to the red and

white target circle), and the area within the

target circle is repaired.B

3 Drag inside the target or source circle to

reposition them, if necessary.C

C To control where source pixels are sampled from manually, drag to reposi-tion the source circle

Pixels within the target circle will update instantly.

A With the Spot Removal tool, drag a target circle

around the blemish to be removed.

B Camera Raw will display and position a linked source circle in a suitably similar area, and will use pixels from within the source circle to repair the blemish within the target circle

Saving and applying Camera Raw

settings

After carefully choosing custom settings for a photo

in Camera Raw, you’ll be happy to know that you can

save those settings as a preset, which you can apply

to other photos, such as photos from the same shoot

that need the same or similar corrections You can

apply a preset to a single photo via Camera Raw, to

multiple photos via Camera Raw (see the next page),

or to multiple selected thumbnails in Bridge via the

Edit > Develop Settings submenu (see the tip below)

To save Camera Raw settings as a preset:

1 With your corrected photo open in Camera

Raw, choose Save Settings from the Settings

menu The Save Settings dialog opens.A

2 Check which categories of settings you want

saved in the preset Or to filter out the number

of checked boxes, choose a category (tab name)

from the Subset menu, then recheck any boxes,

if needed

3 Click Save A different Save Settings dialog opens

(yes, this is confusing) Enter a name (preferably

one that describes the function of the preset),

keep the xmp extension and the location as the

Settings folder, then click Save

4 The saved settings preset is now available in the

Presets tab for any photo (see the instructions

below)

You can apply a user-defined preset (saved collection

of settings) to any photo in Camera Raw

To apply a Camera Raw preset:

With a photo that needs correction open in

Camera Raw, do either of the following:

Click the Presets tab, then click a preset name

From the Apply Preset submenu on the Settings

menu, choose a preset

➤ To apply a Camera Raw preset to one or more

selected photos in Bridge, right-click one of the

selected thumbnails, then from the Develop

Settings menu, choose the desired preset

A In the Save Settings dialog, specify which of your custom Camera Raw settings are to be saved in a preset.

TAKING SNAPSHOTS OF YOUR EDITS

If you save an editing stage of your photo (and the current Camera Raw settings) as a snapshot, you will

be able to restore the photo to that stage at any time

Snapshots save with the Camera Raw fi le

➤ To create a snapshot of the current settings, click the Snapshots tab, then click the New Snapshot button at the bottom of the tab In the New Snapshot dialog, enter a name, then click OK You can continue editing the photo

➤ To restore the photo to a snapshot version at any time, click a snapshot name in the Snapshots tab (If you need to restore your last custom settings, choose Custom Settings from the Settings menu.)

Synchronizing Camera Raw settings

When you open multiple photos into Camera Raw,

they are represented by thumbnails in a filmstrip

panel on the left side of the dialog After adjusting

one photo or choosing a settings preset, you can

click Synchronize to apply those settings to all the

open photos In practice, it’s unlikely that every

single adjustment that is needed for one photo will

work perfectly on all the rest, even if they’re from the

same shoot The Synchronize option is useful,

however, for applying settings incrementally For

example, you could apply an adjustments preset or

some adjustments in the Basic tab to a whole group

of photos (perhaps to correct the white balance and

exposure), click Synchronize, then select smaller and

smaller batches for more targeted adjustments

To synchronize the Camera Raw settings of

multiple photos:

1 In Bridge, select two or more image thumbnails,

preferably for photos that were shot under the

same lighting conditions and that require the

same type of correction (they should be all raw

files or all JPEG files) Double-click one of the

selected thumbnails

2 A filmstrip panel displays on the left side of the

Camera Raw dialog.AClick one of the

thumbnails

3. Make the necessary adjustments to the selected

image, including cropping if all the images are to

be cropped in exactly the same way You could

also click a preset in the Presets tab

4 Click Select All at the top of the filmstrip panel

or Ctrl-click/Cmd-click the thumbnails that

you want to apply the corrections to, then click

Synchronize The Synchronize dialog opens

(it looks like the Save Settings dialog, which is

shown on the preceding page)

5. Either manually check the setting(s) to

be applied or choose a category from the

Synchronize menu (and check any additional

boxes)

6 To apply the current settings in the categories you

checked to all the selected thumbnails, click OK

➤ To cycle through the photos in the filmstrip

panel, click the left or right arrowhead below

the preview (in the lower right) If more than

one thumbnail is selected, Camera Raw will cycle

through only those photos

AWhen you open multiple photos into Camera Raw, the thumbnails for those images display in the filmstrip panel

on the left side of the dialog.