Perceptual-based CNN model for watercolor mixing prediction

Huang, Yabo; Chen, Mei-Yun; Ouhyoung, Ming

doi:10.1145/3230744.3230785

Cited by 3 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Initially, we set the threshold for identifying a color change event at a Δ E r value of 5. This is the Δ E r that corresponds with a color difference that is perceived by the human eye. , With a threshold of Δ E r = 5, fewer than six color change events were observed in our initial method development. Therefore, the threshold was lowered to identify at least six color change events based on the observed color changes.…”

Section: Methodsmentioning

confidence: 99%

Color Space Transformation-Based Algorithm for Evaluation of Thermochromic Behavior of Cholesteric Liquid Crystals Using Polarized Light Microscopy

et al. 2020

View full text Add to dashboard Cite

Cholesteryl ester liquid crystals exhibit thermochromic properties related to the existence of a twisted nematic phase. When used in applications such as thermal mapping, a color change is often monitored by video cameras. Thus, quantitative methods to evaluate thermochromic behavior (e.g., blue-start, red-start, red-end, color play and bandwidth) from video analysis are desirable. However, obtaining quantitative color measurements from digital images remains a significant technical challenge, especially for highly reflective samples such as liquid crystals (for which ultraviolet−visible (UV−vis) reflectance spectroscopy is typically used). We developed a method to determine thermochromic properties from videos of liquid crystal cooling under polarized light microscopy. We relate observed color transitions to quantifiable changes in the cumulative color difference in the International Commission on Illumination (CIE) L*a*b* color space and validate this method with UV−vis reflectance spectroscopy. The measured thermochromic behavior and associated measurement uncertainties (coefficient of variations) were comparable to UV−vis reflectance measurements.

show abstract

Section: Methodsmentioning

confidence: 99%