Abstract. It is well known that more than three or four spectral measurements are required for accurate measurement of color under arbitrary illumination. Previous work has shown 6 to 10 measurements can yield accurate results on average, but with significant numbers of errors above the threshold of obvious visual detection. We demonstrate an imaging system (LED box) consisting of a monochrome camera, multiple LED illumination in a diffuse reflecting chamber that produces excellent color capture in perceptual quality measured in ΔE00. We evaluate this system with respect to practical applications with emphasis on textile quality assessment. Our system of 12 LEDs produces average and maximum training ΔE00 errors around 0.7 and 2.4, respectively; and average and maximum testing ΔE00 errors around 1.5 and 5.0, respectively. This performance exceeds that of reported colorimetric camera systems, except highly specialized configurations. We find that the stability of the system to LED variability under operating conditions is good. We show that pseudoinverse estimate produces better results than the MMSE estimate under actual operating conditions.

中文翻译：

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使用 LED 的准确色度图像

摘要。众所周知，在任意照明下准确测量颜色需要三个或四个以上的光谱测量。以前的工作表明，平均 6 到 10 次测量可以产生准确的结果，但在明显的视觉检测阈值之上存在大量错误。我们展示了一个成像系统（LED 盒），它由一个单色相机、漫反射室中的多个 LED 照明组成，可在以 ΔE00 测量的感知质量中产生出色的色彩捕获。我们根据实际应用评估该系统，重点是纺织品质量评估。我们的 12 个 LED 系统产生的平均和最大训练误差 ΔE00 分别约为 0.7 和 2.4；平均和最大测试 ΔE00 误差分别约为 1.5 和 5.0。除了高度专业化的配置外，该性能超过了报道的比色相机系统。我们发现系统在操作条件下对 LED 可变性的稳定性很好。我们表明，在实际操作条件下，伪逆估计比 MMSE 估计产生更好的结果。