June '20

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2 2 G R A P H I C S P R O J U N E 2 0 2 0 G R A P H I C S - P R O. C O M S I G N A G E & P R I N T I N G T H E D I G I T A L E Y E CONTROLS The Camera Raw Interface (Figure 4) dis- plays the image window on the left, the tools on the top, and the controls on the right. The control menu affects a wide range of image characteristics (Figure 5). Understanding these image characteris- tics is important so that you know exactly what you are editing when you start play- ing with the controls. BACK TO BASICS It's best to start by clicking on the Basic icon. Basic controls many important color and tonal characteristics. White Balance: Photos straight out of the camera often have a colorcast ranging from yellow to blue or red to green. This is usually a result of the light source of the original shot. Different light sources have different temperatures. Tungsten light, found in incandescent bulbs, is warm and can produce a yellowish tinge to the im- age. Fluorescent lighting is cool and can add an unwanted bluish cast to photos. Sunlight, depending on the day and sky conditions, is usually quite warm. White Balance is used for correcting colorcasts that result from a specific light source. In the Camera Raw interface, a menu displays a list of standard color presets. Custom adjustments can be per- formed by dragging the Temperature and Tint sliders. The best white balance results are achieved when the overall cast is elimi- nated, color cast is eliminated, and the im- age appears to have neutral color balance as in Figure 6. The additional adjustments in the Basic field are: Exposure: Often used to correct over- or under-exposed images, this feature can re- store a seemingly unusable image by dark- ening or lightening the tonal range. Contrast: Controls the relationship be- tween tonal ranges. The highlights are lightened, the shadows are darkened, and the mid-tones are remapped. Highlights and Shadows: Targets the spe- cific range of tonality to be adjusted. Whites and Blacks: Focuses on and ad- justs areas of extreme lightness or darkness. TONE CURVE The Tone curve is a powerful feature pro- viding access to the entire range of the im- age's tonality. It is similar to the curves fea- ture in Photoshop but adjusts color with two curve options (Figure 7). The Parametric curve is manipulated with a slider and targets a specific range of tonality. The Point curve manipulates tonality by adding anchor points and bending the curve by dragging the points to new locations. The Tone curve offers precision tonal control and is often used to tweak the image after it has been altered with the Basic settings. DETAILS, DETAILS Controlling detail can make an image pop. There are two sets of controls in the details field. The sharpening feature is used to control the contrast of adjacent edges and if pushed to the extreme, will enhance image grain. Noise Reduction does the opposite. I think that this feature in the Camera Raw interface works better than Photoshop's Noise Reduction filter. Images shot in dark lighting conditions that can contain a lot of color noise, and images with deep unwanted grain, are easily repaired with- out sacrificing detail (Figure 8). FIGURE 4. The Camera Raw Interface displays the image window on the left, the tools at the top, and the controls on the right. FIGURE 5. The control menu affects a wide range of image characteristics. FIGURE 6. The image on the left was shot in tung- sten light. The corrected image on the right uses the Tungsten preset that neutralizes the yellowish cast. FIGURE 7. The Tone curve is similar to the curves feature in Photoshop but adjusts color with two curve options. FIGURE 8 (below). Images with col- or noise are easily repaired without sacrificing detail.

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