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Fortunately, if you select the wrong controls, or sequence, you won’t crash. Looking at these tonal controls-or reading about them-may make some photographers feel like they just slipped into the cockpit of a 747. (In the histogram you’ll see individual colors become more pronounced.) Default setting is 0. Saturation: Increases the strength of colors.
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(Again, you can easily observe this by watching the histogram as you move the Contrast slider.) Default non-auto setting is +25. (Observe this by watching the histogram as you move the Brightness slider.) Default non-auto setting is 50.Ĭontrast: Works in conjunction with the Brightness setting, applying a S-curve that results in either increased or decreased contrast, while leaving the extremes alone. Conversely, moving the slider to the left darkens an image by compressing the shadow areas and opening up the highlights. While positive Exposure settings often clip highlights-moving the Brightness slider to the right doesn’t result in highlight clipping-it compresses the highlights and opens up the shadow areas. Default non-auto setting is 5.īrightness: Similar to Exposure, but redistributes the tonal values in a linear adjustment. Shadows: Darkens the darkest part of the image (setting a black clipping point), while mostly leaving the rest of the image alone. Negative values darken an image, while attempting to maintain detail in the highlight areas. Tonal Control Sliders Exposure: Positive values (over 0) brighten an image and set a white clipping point. White represents all three RGB channels clipped. Yellow represents clipping in red and green channels, magenta represents clipping in red and blue channels, and cyan represents clipping in the green and blue channels. Black represents unclipped pixels, red represents red channel clipping, green represents green channel clipping, and blue represents blue channel clipping. Best to view the results at 100% or higher zoom levels. (As you change the values by sliding the slider, the clipping display updates in real time). Do this by holding down the Option/Alt key while clicking on the Exposure slider. Observe the Exposure-or more accurately, highlight-clipping display. The histogram is not the final judge, but it’s an indispensable tool for getting you the image you want or need. As you’ll see in subsequent sections, the goal is to produce a distribution of tonal values based on both subjective response and quantifiable criteria (such as highlight or shadow clipping). Figure 4-22Įvery image-and every tonal or color change-to that image will produce a different histogram. The exception to this, as you’ll see, is when you use the Exposure or Shadows clipping display when 100% or higher magnification makes the warnings more discernable. You’ll want to magnify your image when it comes time to evaluate sharpness, luminance smoothing, color noise reduction, vignetting and chromatic aberrations, but when it comes to checking white balance and tonal distribution, it’s best to have the whole picture in view. (Keep in mind that ProPhoto is a less supported color space than Adobe RGB, and ProPhoto images can look really bad if viewed in a non-color managed application.) If you plan on editing your images further in Photoshop, use the color space with the widest possible gamut. If you have no plans to further process your image outside of Camera Raw, and your destination is a display monitor or low-end desktop printer, sRGB may be your best option. Which space you use depends on your goal and the color space you are used to working in. Useful Keyboard Commands for Adjust & Curve TabsĬreating Custom Camera Profiles with the Calibrate Tab I’ll cover all these topics in detail and more in this chapter.Ĭhapter Contents Using Camera Raw Auto Adjustments Some of these same controls can also be used to redistribute tonal values to compensate for a less-than-perfect exposure. Or, if you prefer, you can manually change the white balance or tweak the Adjust or Curve tab controls to make an image more contrasty, cooler, or more saturated. You can the Adjust or Curve tab controls to automatically set the look and feel of a particular image. As we saw in the previous chapter, Adobe Camera Raw provides many ways to do this. Chapter 4. Using Camera Raw Adjust & Curve ControlsĪll RAW files require extensive processing to produce an image pleasing to the eye.