Fashion Photographer Speaks on High-Technology in Advertising

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Fashion Photographer Greg Passmore speaks at a high-tech conference on the use of laser radar and it's applications to the industry. Benefits of the work include generating synthetic camera views, simplification of stereoscopic filming, better use of virtual sets and dynamic re-lighting in post.

Fashion Photographer Greg Passmore discusses the use of laser radar for enhanced photography. Although technical in scope, the research offers promising benefits to both stereoscopic and traditional imaging.

The paper discusses three application areas for depth map creation using laser radar (LADAR); synthetic inter-ocular distances (SIOD) and convergence, virtual set merging of live action and dynamic re-lighting of content in post. Any one of these applications brings considerable value to the video production process. Additionally, the problem of merging multiple LADAR views into an integrated model is covered. Such large scale multi-view LADAR systems are just now emerging and promise to create synthetic video environments more complex than image arrays mixed with depth maps, resulting in the ability to adjust camera position via synthesis.

SIOD creation makes use of a variant of synthetic apertures to simulate a camera array. Such synthetic apertures allows for post shoot adjustments in inter-ocular distance and convergence. Artifacts created during synthesis are resolved using the high resolution depth map created by the LADAR in combination with localized image warping.

Depth maps created during virtual set rasterization can be merged with LADAR depth maps of live action to resolve not only complex occlusion issues, but also to preserve the perceived depth integrity of live action objects. Live objects have depth and visually seam well.

Re-lighting makes use of LADAR depth maps to derive a normal map which can be used to change lighting after the shoot. This application of LADAR is most commonly used to match lighting between live action and background effects shots shots under different lighting conditions.

Multiple LADAR viewpoints are valuable to reduce the effects of laser shadows, glancing angles, and limited complexity of a single view. Through the use of multi-view depth map capture, virtual stereoscopic cameras can be placed into the scene for post production adjustments of camera positions.

The materials were developed for "Stereoscopic Displays and Virtual Reality Systems", a gathering of technologists and scientists pushing the edge of stereoscopic photography and video.

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Chrissy Pauluk
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