ArticleOptics express2022
Spectral measurement of daylights and surface properties of natural objects in Japan.
Article in Optics express, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
What it found
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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
10 citing papers in PubMed.
- Are Toxic Butterflies More Easily Detected by Human 'Predators'?Ecology and evolution · 2026Article
- Spectral dataset of natural objects' reflectance from the Southern cone of South America.Scientific data · 2025Article
- The International Skin Spectra Archive (ISSA): a multicultural human skin phenotype and colour spectra collection.Scientific data · 2025Article
- Article
- Misidentifying illuminant changes in natural scenes due to failures in relational colour constancy.Proceedings. Biological sciences · 2023Article
- Color and gloss constancy under diverse lighting environments.Journal of vision · 2023Article
- Invariant categorical color regions across illuminant change coincide with focal colors.Journal of vision · 2023Article
- Spectral measurement of daylights and surface properties of natural objects in Japan.Optics express · 2022Article
- Article
- Human color constancy in cast shadows.i-PerceptionArticle
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
We present a spectral dataset of daylights and surface reflectances and transmittances of natural objects measured in Japan. Daylights were measured under the sun and under shadow from dawn to dusk on four different days to capture their temporal spectral transition. We separately measured daylight spectra at five different locations (including an open space and a forest) with minimum time difference to reveal whether a local environment alters daylight spectra reaching the ground. We found that colors of natural objects were spread in a limited area of color space, and data points were absent around saturated green regions. Daylight spectra were found to have a larger variation across time, weather, and local environments than previously thought. Datasets are made freely available, expanding past public datasets mainly collected in Northern America and Europe.
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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.