Sign & Digital Graphics

April '20

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5 0 • A P R I L 2 0 2 0 • S I G N & D I G I T A L G R A P H I C S Photo Filter Warming or cooling an image might be just what is required to smooth its overall tonality. Photo filters produce results that are commonly used by pho- tographers to warm or cool the colors of an image, reduce glare or simulate a specific atmospheric environment. Click the Photo Filter icon in the Adjustments panel to display the Photo Filter inter- face (Figure 4) and choose a specific filter from the menu or a specific color by clicking the swatch and generating a color from the Color Picker. Control the strength of the color by moving the density slider between 1 and 100 percent. When checked, the Preserve Luminosity box applies the color and leaves the relative brightness values of the image unchanged. It pays to experiment with different colors and amounts to produce perfect results Some photo filters such as the Warming Filter (85 and L B A ) and Cooling Filter (80 and LBB) are color conversion filters that target the white balance in an image. If an image appears yellow due to color distortion, the Cooling Filter (80) moves the colors towards the higher temperature range so that they appear bluer to compensate for 4 Warming or cooling an image with a photo fil- ter might be just what is required to smooth its over- all tonality. the lower color temperature of the ambi- ent light (Figure 5A,B). Conversely, if the photo was taken at a higher color temperature and appears blue, it will appear more yellow when the Warming Filter (85) is applied. Choosing Individual Colors from the color swatch applies a hue adjust- ment to the image depending on the color preset you choose. Your choice of color depends on how you're using the Photo Filter adjustment. If your photo has a color cast, choose a complementary color to neutralize the color. Colors can also be applied for special color effects or enhancements. Shadow/Highlight The Shadow/Highlight command quickly corrects over and under exposed areas of an image. This adjustment is not represented in the Adjustments panel so choose Image > Adjustments > Shadow/ Highlight to display the dialog box. You'll also want to expand the panel by checking the Show More Options box (Figure 6). Shadow/Highlights corrects each pixel adaptively, according to the lumi- nance of the neighboring pixels to allow image contrast to be increased in the shadows or highlights without signifi- cantly sacrificing contrast in the other tonal regions. The technique is essential 5a 5a 5b 5b The before (5a) and after (5b) results of applying the Cooling Filter 80 at 51% density to an image shot in warm light.

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