P‐60: Hyper‐Realistic SDR/LDR Image Reproduction Proposal Needing Just Approx. 1/30th Exposure of Conventional SDR Image and Global‐Tone‐Mapping, or 1D‐LUT, in UHDR Environments Regardless of Time of Day

Perceptually natural SDR (Standard‐dynamic‐range) / LDR (Low‐dynamic‐range) images should retain enough information for the human observer to estimate the visual environment in which the UHDR (Ultra‐high‐dynamic‐range) scene was captured in not only daylight, but also twilight (mesopic) vision. Our current proposal brings two significant achievements: (1) only conventional SDR images, not HDR ones, need be captured, and (2) realizes antinomy of incomparable sensitivity (approx. 30 times) and yields hyper‐realistic reproduction quality.