Sign & Digital Graphics

April '20

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S D G M A G . C O M • A P R I L 2 0 2 0 • 5 1 for bringing out detail in over-exposed or backlit images The sliders represent six aspects of the adjustment each targeting a specific aspect of relative color characteristics. Amount This slider controls the strength of the adjustment to each pixel. Larger val- ues provide independent lightening of shadows or darkening of highlights. Tone The Tone slider sets how much modi- fication will be applied to the different tonal regions. For example, you may want to darken only the lightest high- lights, or lighten only the deepest shad- ows. When correcting shadows, small values of Tone put most of the emphasis on the darker regions of the image; larger values include more of the midtones and highlights. Radius The size of the neighborhood over which the luminance is averaged depends upon the Radius setting. Every pixel is modified depending upon how dark or light its neighbors are. The larger the radius, the larger the extent over which the neighborhood luminance is averaged. Color After you've applied the Shadow/ Highlight command you may find that the image has acquired an undesirable 6 The Shadow/Highlight com- mand quickly corrects over and under exposed areas of an image. color cast. Drag the Color adjustment slider to the left to diminish the over adjustment. Moving the slider to the left decreases the saturation of the image. Moving it to the right increases the satu- ration. Midtone Increasing or decreasing the midtone produces an overall contrast adjustment that may be just what you need to really pop the image. Black and White Clip These percentage fields display a value for the amount that absolute black and specular white are altered. By enter- ing a value of five percent, for example, the value of ninety five percent black will be increased to one hundred percent, and all other colors will be remapped accordingly so the image will appear darker. Five percent in the white field will lighten the image. The before and after images in Figure 7A and B are a result of apply- ing a Shadow/ Highlight adjustment that lightened the overall shadows and slightly darkened the lightest areas. Afterwards a modest color adjustment was applied to slightly saturate the image. The midtone was modestly increased to enhance contrast. The results are an extraordinary restoration of a virtually unusable photograph. Dig Deep The three techniques featured in this article are direct and easy to perform and they produce great results. They can remedy color problems that the basic adjustments can't completely address. Photoshop has many hidden features that help produce outstanding pictures com- posed of brilliant color, enhanced con- trast and knock-your-socks-off impact. Sometimes they are not so easy to find, so dig deep and experiment. SDG Shadow/Highlight does a great job of balancing the con- trast of overexposed or backlit image. 7a 7a 7b 7b

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