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BIBLE
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BIBLE
Lisa DaNae Dayley Brad Dayley
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You can reduce the noise in your image by adjusting the following settings:
n Luminance This reduces the amount of grayscale noise.
n Luminance Detail This preserves the detail of the edges, counteracting the blurring
effect created by increasing the luminance
n Luminance Contrast This counteracts the blurring created by increasing the
lumi-nance, but to a smaller degree than the Luminance Detail slider It increases the con-trast between the bits of grayscale noise
n Color This reduces the amount of color noise.
n Color Detail This allows you to preserve the detail in the edges of your photo,
coun-teracting the blurring effect created when the color noise is reduced
nOte
Keep in mind that Photoshop reduces noise by blurring your image and decreasing contrast of individual pixels
Sharpening also affects your image at the single-pixel level It is important to preview your image zoomed in at least
100 percent in order to see and fine-tune the effects of both noise and sharpening on your image
Trang 7Part II: Working with Camera Raw Images
Sharpening
Sharpening works by increasing the contrast around the edges of your image to bring it more into focus, adding detail to your image Camera Raw sets the default sharpening at 25 for RAW images This is not a huge amount; in fact, it is comparable to the sharpness your camera auto-matically applies to a processed image A lot of experts will tell you, though, that adding any sharpening by default is a bad idea, so if you want to change the default setting to 0, reset the slider and choose Set New Camera Raw Defaults from the Adjustment Tabs menu
Sharpen your photo by using the following adjustments:
n Amount This sets the amount of sharpening applied to your image The amount you
choose is directly tied to your Radius and Detail settings
n Radius This setting enables you to choose your radius based on the size of the detail
in your image An image with very small detail should have a small Radius setting Images with larger details can get away with a larger Radius setting, but keep an eye
on that preview; a large Radius setting can introduce an unnatural amount of con-trast to your image
n Detail This setting heightens the detail of your image as you raise it by applying the
sharpness to higher-frequency areas of your photo A very high detail setting gives your image an almost textured look
n Masking This setting, if raised, applies more of the sharpening effect to the edges of
your image and less to the overall image
tip
If you hold down the Alt/Option key while you adjust the Sharpening sliders, you see a preview of what the control is doing to your image This is a great way to become more familiar with the Sharpening controls and to find the optimal setting for your image
Summary
This chapter really went into the fundamentals of using Camera Raw You learned about color and light and how they can be adjusted using the tools and panels in Camera Raw
Specifically, you learned how to do the following:
n Change the light settings to improve the exposure and contrast in an image
n Make color corrections to an image or individual colors in that image
n Make targeted adjustments to only selected portions of your image
n Create artistic effects with your images
n Apply the finishing touches by correcting camera aberrations, sharpening, and reduc-ing noise in your image
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