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halo and line on horizon<\/em><\/p>\n Nothing screams digital artifacts more than halos and lines. Bright and dark lines around the edges of objects make straight photographs look altered, and altered photographs look poorly crafted. Rarely, if ever, a good thing, their insensitivity to both contours and textures within images is supremely distracting. It's easy to eliminate these dealbreakers if you know what to look for, how to avoid them, and, when necessary, eradicate them.<\/span><\/p>\n Know What To Look For<\/span><\/strong><\/p>\n First, know what to look for. If halos and lines exist, you'll find them along the edges of shapes and, sometimes, the spaces objects surround. They're most pronounced when the inside and the outside exhibit more contrast. Halos, the bright lines, are obvious; the brighter, thicker, harder halos are the more obvious, while darker, thinner, softer halos are less obvious. Lines, the dark lines, are less obvious. As they get darker, thicker, and harder, they become more obvious.\u00a0<\/span><\/p>\n Know How To Look For It<\/span><\/strong><\/p>\n Halos are harder to spot in higher-resolution images that must be zoomed in (100% screen magnification) to be seen accurately. The worst is seeing them after an image is printed on a large scale. This time-consuming and expensive mistake can easily be avoided by looking closely at images before processing is finished.<\/span><\/p>\n Don't Produce Them<\/span><\/strong><\/p>\n Second, know how they're produced. The quickest way to produce halos and lines is with digital sharpening, whether that's the Detail panel in Lightroom or Camera Raw, filters in Photoshop like Unsharp Mask and High Pass, or third-party plug-ins like Nik. The point here is not to avoid these tools but rather to apply them in ways that don't or minimally produce these artifacts. The next quickest way is to use any contrast tool that accentuates them; sliders in the Light panel, Curves, Texture, Clarity, and Dehaze should be monitored too. These tools won't produce halos, and if you don't have halos and lines, these tools won't accentuate them. (Careful, at high settings, Clarity and Dehaze may produce very thick, feathered halos and lines, and when they've gone too far, these artifacts look more like sloppy masking than over-sharpening. These are much harder to fix than hard lines around contours, so try not to produce them.)<\/span><\/p>\n
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