Sign & Digital Graphics

February '18

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S I G N & D I G I T A L G R A P H I C S • February 2018 • 43 DIGITAL PRINTING AND FINISHING DIGITAL GRAPHICS Anaglyphic 3D Offsetting color channels produces startling 3D effects Stephen Romaniello is and artist and edu- cator who has taught digital art at Pima Community College in Tucson, Arizona, for over 26 years. He is a certified instructor in Adobe Photoshop and the author of numer- ous books and articles on the creative use of digital graphics software. Steve is the founder of GlobalEye Systems, a company that offers training and consulting in digital graphics software and creative imaging. B Y S T E P H E N R O M A N I E L L O The Digital Eye If you are looking to create a piece of Avant Guarde art, you might consider trying this approach, varying the degree of offset in each channel. If you're more interested in producing real 3D images that have visual depth and leap off the page, you can do it using similar but more controlled techniques. By the precise offsetting of color channels, images with startling depth can be created. 3D Glasses In order to see this particular 3D effect in its full glory, you'll need red and blue 3D glasses like those shown in Figure 2. You can get a pair at the Rainbow Symphony website: www. rainbowsymphonystore.com/collections/3d-glasses. RGB digital images are composed of three color chan- nels. Repositioning the contents of a color chan- nel up or down, or to the left or right misregisters the channel to produce an alteration in color. Moving the red channel a few pixels to the right or left, up or down produces interesting color configurations. Lately I've seen a lot of graphics that produce the faux 3 D effect, and it's becoming a common graphic design idiom (see Figure 1). Figure 1: The faux 3D effect is becoming a common graphic design idiom. (Image by Garyck Arntzen ©2014-2017 GaryckArntzen) Figure 2: To be able to see the 3D effect requires red and blue 3D glasses. Low cost paper or plastic-framed 3D glasses hold accurate color filters and lately there has been a significant improvement of the cyan filter, especially for viewing accurate skin tones. Brief History 3D images have been around for quite some time. In 1833, the English scientist, Charles Wheatstone, discovered that because human eyes are not at exactly the same place, objects viewed through eyes are not the same, thus creating an illu- sion of depth. In 1846, Werner Rollman of Stargard, Germany, invented 3D anaglyphs, which are composed of two sets of

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