Photoshop cs5 cho nhiếp ảnh gia part 56 pot

For Photoshop Elements Users: Converting to Black and White Photoshop Elements has its own Convert to Black and White tool, which works similarly to the Channel Mixer.. all you need to d

For Photoshop Elements Users: Converting to Black and White

Photoshop Elements has its own Convert to Black and White tool, which works similarly to the Channel Mixer Open it by choosing Enhance > Convert to Black and White

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At the bottom of the dialog, you will find various presets on the left and sliders on the right to adjust the amount that each channel contributes to the image, as well as a contrast adjustment slider Hold your mouse over a slider to access a tooltip that will indicate the percentage value for the given slider Click OK when you are pleased with the results

Colorizing Black-and-White Images

You may be quite content with the black-and-white rendition of your image, or you

may want to experiment with adding color back into your image, depending on the

effect you’re after

for example, you may decide that you’d like to emphasize one particular aspect

of the picture by having it in the original color while the rest of the picture remains

black and white this look—popular in greeting cards—is incredibly easy all you

need to do is select the Brush tool, set it to black, make sure the Channel Mixer or

Black & White adjustment layer is active (highlighted) and that the mask is selected

(has a little outline around it), then paint over the areas you want to be in color (see

figure 9.7) Use the sliders and options within the Masks panel to perfect the edges of

the area you’re masking it’s that simple!

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Utilizing the Silver Efex Pro Plug-in

The image used in Figure 9.7 was converted to black and white using Silver Efex Pro from Nik Software and then the conversion was removed/reduced in certain areas using a layer mask as described in the text Silver Efex Pro is an outstanding plug-in for converting images to black and white and is compatible with Photoshop, Elements, Lightroom, and Apple’s Aperture

It includes numerous preset effects as well as an amazing array of tools that you can use (or ignore) to create a wide variety of effects with a few simple clicks Compare this dramatic black-and-white version of an elephant to the version presented in Figure 9.1

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While you can create similar effects using Photoshop alone, often it takes more time If you are interested in black-and-white images, we highly recommend that you check out the software at

www.niksoftware.com (Use the promo code EAnon for a discount.)

if you want an area to have a different color than the one that was originally

there, create a Hue/saturation layer on top of the Channel Mixer layer, and adjust the Hue slider (as well as the saturation and Lightness sliders if desired) until the target item is the shade you prefer

some people prefer a hand-tinted look an easy way to create such a look is to reduce the opacity of the adjustment layer itself, using the Opacity slider in the Layers panel to achieve the desired look (see figure 9.8) the final opacity is a matter of indi-vidual preference

Figure 9.8 By reducing the opacity of the Channel Mixer or Black & White adjustment layer, you can create a hand-tinted

look; for more impact, combine that with restoring full color to just a few areas, such as the man and the window in this photo

an alternate approach to adding color to a black-and-white image is to create

a stamp visible layer after using the Black & White adjustment layer or the Channel Mixer set the Brush tool to Color mode in the tool Options bar, and select the desired color in the Color Picker reduce the opacity of the brush to subdue the colors Paint each area as appropriate

For Photoshop Elements Users: Colorizing Black-and-White Images

As in previous chapters, we need to do some trickery to create a layer mask for our black-and-white image

1 Before converting the image to black and white, duplicate your image layer by dragging it

to the New Layer button in the Layers panel

2 Add a Levels adjustment layer and leave it empty.

3 Move the Levels adjustment layer below the layer you created in Step 1.

5 Select the topmost layer and convert it to black and white.

6 Select the Level adjustment layer’s mask and paint in black to restore the color to your image.

For Photoshop Elements Users: Colorizing Black-and-White Images

As in previous chapters, we need to do some trickery to create a layer mask for our black-and-white image

1. Before converting the image to black and white, duplicate your image layer by dragging it

to the New Layer button in the Layers panel

2. Add a Levels adjustment layer and leave it empty

3. Move the Levels adjustment layer below the layer you created in Step 1

4. Select the topmost layer and choose Layer > Create Clipping Mask

5. Select the topmost layer and convert it to black and white

6. Select the Level adjustment layer’s mask and paint in black to restore the color to your image

For Photoshop Elements Users: Colorizing Black-and-White Images (Continued)

Creating a Sepia-Tone Effect in Elements

1 Follow Steps 1–5 (from the previous page).

2 Create a Stamp Visible layer by selecting the topmost layer and pressing Ctrl+Alt+Shift+E/

F+Option+Shift+E

3 Click the Create Adjustment Layer button and choose Photo Filter.

4 Change the filter type to Sepia and adjust the density.

5 Click OK when finished.

Another way to create a sepia-tone effect or other color effect is to create a Stamp Visible layer and then choose Enhance > Adjust Color > Color Variations This dialog, seen in the image here, allows you to visually explore what happens as you adjust colors in the highlights, midtones, and shadows

Tr y It! Open the image called BlackAndWhite on this book’s companion website, www.sybex com/go/photoshopnature, or one of your own color images Try converting it to black and white using the Black & White and Channel Mixer adjustment layers Experiment with restoring color in part

of it or giving it a hand-tinted or sepia look

Painterly Images

Cs5 has introduced a new type of brush called the Mixer Brush tool in addition there is a new set of brush tips that have a very realistic look and feel, as if you were actually painting on a canvas with an artist’s brushes By using these together, you can begin with a photograph and end up with something that looks much more like a painting, as shown in figure 9.9

to begin, click on the Brush tool, then hold the lower-right corner until the

tool Options bar, as shown here

starting from the left, the first three icons are standard for all the Brush tools

with the color that the brush may pick up from the canvas depending on the Wet

set-ting Click the arrow to access options for cleaning the brush manually or loading the

brush Hold down the alt/Option key and click the color at any time to access the

Color Picker to choose a new color to load in the reservoir

then the color that’s on the brush may fade out or build up if you’re in the mood to be

creative, you may want to try toggling these off and seeing what happens, but so far in

most of our experiments with the Mixer Brush, we prefer these options on

the next item on the tool Options bar is a drop-down menu that contains pre-sets for the main Mixer Brush options: Wet, Load, and Mix there’s also a Custom

option available

the higher the Wet setting, the more the brush picks up its colors from the image the lower the setting, the less color the brush picks up from the image

the Load setting determines the quantity of color that the brush has available

to put down With less quantity and longer strokes, the color simply fades out just as

a real brush would do if it had only a little paint on it and you made a long stroke as

you drag, the effect tapers off because it’s like dragging a brush with no paint on it

across the canvas With lower amounts it takes more strokes to build up an effect

the Mix setting determines how much paint from the stored reservoir color is mixed with paint picked up from the canvas the lower the Mix setting, the less paint

from the reservoir is mixed with whatever the brush picks up from the canvas

We find that although you may want to start by selecting one of the presets, it’s likely that you’ll want to adjust the individual settings and use your own custom

set-tings remember to clean and load your brush as necessary just as you would with a

real paintbrush

experiment with painting using the different brush tips and adjust the sizes Of course, you can apply these techniques to as much of the image as you desire, and as

subtly or dramatically as you choose We modified the background of this image in

figure 9.10 but left the main subject alone

Tr y It! We found that it helps to start with a practice image to get familiar with the controls

You can download the image MixerBrushDemo from this book’s companion website, www.sybex com/go/photoshopnature, and use it to get familiar with the Mixer Brush

Figure 9.10 In this image we painted on the background only to achieve a subtle painterly effect.

Note: You can create customized brush tips to use when painting by going to Window > Brush and click-ing one of the preset bristle tips as shown here A Bristle Qualities dialog appears in which you can specify the various parameters of the bristle tip Experiment with the settings to get precisely the effect that you need

Filters

Photoshop includes a huge array of filters that make it easy to distort your picture in

all sorts of ways some of the filters correct problems in the image such as vignetting

or pin cushion/barrel distortion, while others are primarily to add artistic expression

it’s beyond the scope of this book to cover them all, but we’ll describe a few that we

find particularly useful However, the best way to get familiar with the filters is to

open an image and begin experimenting We’ll begin by describing how to use smart

filters and regular filters

Note: If you opt for the “experimental” approach, it’s a good idea to turn on the History Log in your General Preferences (refer to Chapter 4, “Foundations,” for details) so that you can remember what you did

if you stumble across something wonderful! In fact, any time you are being “creative” with your image, it’s smart to turn on the History Log You may think you’ll remember exactly what you did, but if you’re any-thing like us, at some later date you’ll be frustrated because you can’t recall how to replicate the effect

Since Elements does not provide a history log, we recommend using a notepad to keep track of what you’ve done to your image

Using Smart Filters on Smart Objects

Cs5 has smart filters, meaning that filter effects can be readjusted repeatedly, even

if you close and reopen the image this is a welcome feature, very similar to the

flex-ibility of the adjustments in adjustment layers By using smart filters, you can create

different combinations of filter effects that you can dynamically adjust as desired

Unfortunately, smart filters are available only for certain filter effects with 16-bit