Superimposing Dynamic Range

We present a simple and low-cost method of viewing static HDR content based on reflective image modulation. We project images onto hardcopies, such as photographs, X-ray prints, or electronic paper (ePaper) so as to boost contrast, perceivable tonal resolution, and color space values beyond the potential of either hardcopies (when viewed under environment light) or projectors (when projecting onto regular screens) alone. We do not intend to compete with interactive HDR displays, but rather offer an 'everybody can do' alternative for domains that operate with static image content, such as radiology and other medical fields, or astronomy. Yet, electronic paper will allows for interactive visualizations. In our experiments, we achieved contrast ratios of over 45,000:1 with a peak luminance of more than 2,750 cd/m^2, could technically re-produce more than 620 perceptually distinguishable tonal values (approximately 85% of all theoretically possible JND steps). Furthermore, we attained color space extensions of up to factor 1.4 (compared to a regular projections) or factor 3.3 (compared to regular hardcopy prints). Thereby, the hardcopy resolution can be several thousand dots per inch, while luminance and chrominance are modulated with a registration error of less than 0.3 mm. Thus, compared with most existing interactive HDR displays, we support near distance viewing at a contrast resolution of up to 7 cpd (given our current registration precision and assuming a viewing distance of 50 cm).

Category:

Science & Technology

Tags:

• computer
• augmented
• reality
• electronics
• environment
• medicine

[ralfmm]

Awesome -- I love the final example of holiday snaps enhanced with projection. Bring back the slideshow for visiting friends! :-)

Ralf

[DJuggz06]

no idea what ur talking about, but must be good. Keep it up :-D