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82 Match Grain
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In conventional photography, the grain of film has to do with the fineness of the chemical particles that make up the color When the negative is enlarged enough, you can actually see the particles, which give the picture a grainy look With digital photographs, the graininess comes from noise ( visual static ) in the circuits of the camera The noise adds a color fluctuation that brands the file with a grain signature
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As you combine images and transform them with various tools, it is possible to come up with mismatches in grain This occurs because as you alter areas of the
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CHAPTER 11: Creating a New Reality with Composites
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image, you are stretching and smoothing the pixels and therefore changing the noise patterns Because your eyes and brain are exceptional at recognizing patterns, these mismatches are very apparent You want your changes to blend back into the image seamlessly, so you need to adjust the grain to camouflage the differences
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The best tool for unifying textural mismatches is the Noise Filter Although a Grain Filter is also available, this tool s results aren t as good as those of the Noise Filter, most of the time You can try both filters and use the filter that works best for your situation Here s how to adjust the grain of a component to blend better into the original:
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1 From the Layers Palette, make active the layer of the component you want
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2 Choose Filter | Noise | Add Noise The Add Noise dialog box will appear,
as shown in Figure 11-9
FIGURE 11-9
In the Add Noise dialog box, you can add noise to the rose in the foreground to make the textures match with the one behind
Digital Photography: 99 Easy Tips to Make You Look Like a Pro!
3 Adjust the Amount slider to increase or decrease the amount of noise Click
the Uniform option to keep the distribution of noise constant over the area of effect Click Gaussian to produce a high-contrast noise effect, and Monochrome will match the noise to the hue of the underlying pixels With Monochrome turned off, you can produce RGB artifacts similar to the noise actually produced by the camera Experiment with the setting until you get a good match to the original
12
Special Effects
Digital Photography: 99 Easy Tips to Make You Look Like a Pro!
his chapter is dedicated to some special techniques that take photographs beyond the everyday kind You will learn how to add drama with lighting, blend photos to come up with unique looks, and even create your own weather effects Special effects are fun to experiment with and easy to create
83 Create Lighting Effects
Lighting effects are software routines that change the focus, quality, color, intensity, or spread of the lighting in the picture You can accomplish these effects using filters or blends, or by hand painting your photos
Why Would I Want to Create Lighting Effects
Each type of lighting has its own unique look Many professional photographers search for or create unusual lighting that will accent the subject of a photo shoot The type and quality of the lighting can make or break a photograph in many instances Because perfect lighting isn t always available when the subject matter presents itself to be photographed, you can use image-editing software to add special lighting effects after the photo is taken This opens up a wealth of creative opportunities, such as adding a soft spotlight to a portrait that guides the viewer s attention to a particular area of the picture, or changing the time of day You can even change the season of a shot by altering the light to indicate a particular effect create a cold look for winter or a warm look for summer Lighting effects can add a sense of mood and drama to your photos
How Do I Create Lighting Effects
The Lighting Effects Filter is the most basic and easy-to-use tool in your imageediting tool kit The filter allows you to create spot, directional, and flood lighting while controlling ambient (general) lighting at the same time In Figure 12-1, I used a spotlight to focus a soft glow on the subject while darkening the general lighting to provide contrast To apply a lighting effect, choose Filter | Render | Lighting Effects to open the Lighting Effects dialog box shown in Figure 12-2 In this dialog box, you ll see a circle and a radius line over the preview of your photo The circle indicates the maximum diameter of the light and the radius line indicates the direction the light is shining It is best to try and match the direction of the light to the existing light source, because the program needs to use the lights and darks to create the pseudo-lighting effect
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