![]() To evaluate the results fairly, I needed a standard for comparison. HDR Photomatix TC-Processed with HDRsoft Photomatix Pro 4.0 using Tone Compressor. For each test scene, I made three exposures, with exposure compensation values of -2, 0 and +2. ![]() Using a Sekonic L-608 spot meter, I measured a six-stop range between the dark, shadowed midground evergreens and the glowing clouds. For my second test case, I picked a high-contrast image of a stormy sunrise over Longs Peak. For my first test case, I chose an image of the sun setting over Pigeon Peak, shot from the summit of Mount Eolus. Often, HDR software creates unnatural concentric bands around the sun, with sharp transitions between bands rather than a smooth gradient. The most difficult subjects for any HDR package are those that include the sun. Additionally, HDR Expose has a twin, a Photoshop plug-in called 32 Float. Unified Color Technologies HDR Expose is a stand-alone program that also can be used as a plug-in for Aperture and Lightroom. Nik Software HDR Efex Pro can be used as a plug-in for Lightroom, Aperture and Photoshop. HDRsoft Photomatix Pro is best used as a stand-alone program or as an export plug-in for Lightroom the plug-in versions lack some features. The latest generation of HDR software goes a long way toward solving these problems. HDR Photomatix EF-Processed with HDRsoft Photomatix Pro 4.0 using Exposure Fusion. Simply taking the overall range of tones and compressing it in some linear fashion won’t cut it. The challenge for HDR software is to maintain good local contrast within regions, while still creating believable transitions between regions. Instead, we analyze contrast within regions, most obviously shadows and highlights, but also more subtly. In other words, we don’t look at the darkest part of the overall scene and call it black, then look at the brightest part and call it white. Our visual system analyzes contrast locally rather than globally. Granted, HDR software must solve a tough problem: replicating the intricacies of human vision. HDR Photomatix Deghosted-Processed with HDRsoft Photomatix Pro 4.0’s Details Enhancer and the semi-manual deghosting utility. HDR Expose-Processed with Unified Color Technologies HDR Expose. Raw-Best image possible from a single raw capture, processed in Adobe Camera Raw. ![]()
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