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Proceedings of CAD'15, 2015, 398-401
The Effect of Colored Lighting on Color-Depth Perception – Comparing Two Techniques in HDR Image Generation
Abstract. Chromostereopsis (color stereopsis) is a phenomenon wherein colored objects on the same plane appear to be on different planes and prior research on this topic have been mainly been about the physiological and optical causes. But in a three-dimensional world, there are many more factors to consider than just physiological or optical causes for chromostereopsis, such as perceptual causes. Studies on the perceptual basis for chromostereopsis have emerged over the years, which includes border contrast between a target and its surround. However, many of the studies did not incorporate the effect of lighting; the ones that did only tested the illumination level, not its spectral composition. Lighting, especially colored lighting, has been known to affect color appearances of objects, but none have explored how lighting could affect chromostereopsis. In a previous study that explored just that, the visual stimuli used for the psychophysical experiments were high-dynamic range (HDR) images produced by combining captured low-dynamic range images of a scaled model, thereby creating a radiance map. However, the materials available commercially can limit the range of colored lighting conditions that could be tested. Furthermore, the output images show some degree of camera shake despite attempts to minimize camera movement during image capture, resulting in minor (possibly negligible) misalignment and image blur in the final HDR image.
Keywords. Color-depth perception, Chromostereopsis, Colored lighting, High-dynamic range imaging, radiance