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Summary & Details

A Study on a Quantitative Evaluation Method for Daytime Visibility of Automotive Interior Illumination Using CIELAB

Delivery: Available on this site

Format: PDF

Price: Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880

Publication code: 20266318

Paper/Info type: Proceedings (Autumn)

No.158-26

Pages: 1-5(Total 5 p)

Date of publication: Oct 2026

Publisher: JSAE

Language: English

Event: 2026 JSAE Annual Congress (Autumn)

Detailed Information

Author(J)	1) Seong Uk Kim
Author(E)	1) Seong Uk Kim
Affiliation(J)	1) Hyundai Motor
Affiliation(E)	1) Hyundai Motor
Abstract(E)	Daytime visibility assessment of automotive interior illumination has traditionally relied on subjective evaluation, leading to inconsistent pass or fail criteria. This study proposes a quantitative method based on LMK imaging photometer measurements in CIELAB color space. Although dE00, a conventional color difference metric, did not correlate well with visual perception, dLstar and LCR were found to be more effective indicators of daytime visibility. Empirical analysis showed that daytime visibility was insufficient when dLstar was below 4.5 or LCR was below 0.06. This luminance based criterion enables objective and reproducible evaluation for automotive interior illumination design.

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