ArticleOptics express2019
Hyperspectral environmental illumination maps: characterizing directional spectral variation in natural environments.
Article in Optics express, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
11 citing papers in PubMed.
- Nocturnal camouflage through background matching against moonlight.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- A hyperspectral open-source imager (HOSI).BMC biology · 2025Article
- How many surfaces can you distinguish by color? Real environmental lighting increases discriminability of surface colors.Optics express · 2024Article
- Misidentifying illuminant changes in natural scenes due to failures in relational colour constancy.Proceedings. Biological sciences · 2023Article
- Spectral Super-Resolution for High Dynamic Range Images.Journal of imaging · 2023Article
- Spectral measurement of daylights and surface properties of natural objects in Japan.Optics express · 2022Article
- Hyperspectral characterization of natural lighting environments.Progress in brain research · 2022Article
- Luminosity thresholds of colored surfaces are determined by their upper-limit luminances empirically internalized in the visual system.Journal of vision · 2021Article
- Human color constancy based on the geometry of color distributions.Journal of vision · 2021Article
- Fluctuating environmental light limits number of surfaces visually recognizable by colour.Scientific reports · 2021Article
- Colors and Things.i-PerceptionArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
Abstract
Objects placed in real-world scenes receive incident light from every direction, and the spectral content of this light may vary from one direction to another. In computer graphics, environmental illumination is approximated using maps that specify illumination at a point as a function of incident angle. However, to-date, existing public databases of environmental illumination specify only three colour channels (RGB). We have captured a new set of 12 environmental illumination maps (eight outdoor scenes; four indoor scenes) using a hyperspectral imaging system with 33 spectral channels. The data reveal a striking directional variation of spectral distribution of lighting in natural environments. We discuss limitations of using daylight models to describe natural environmental illumination.
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.