High dynamic range (HDR) capture and display systems have proven capable of dramatically improving images, ranging from Renaissance paintings and early silver-halide photography to sensor research, camera design, image processing, display technology, and human-vision research. This Spotlight provides a gateway to understanding HDR imaging. Topics include how painters and photographers succeeded before electronic imaging; how optical glare transforms scene radiances; and how sensors, signal processing, and human spatial image processing generates sensations.
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