Correction to: Pulse oximeter bench tests under different simulated skin tones

The original version of this article unfortunately contained mistakes. A reader alerted us to an issue in Table3. We confirm that the ITA° value for the 2.5mg/mL (J) melanin filter is + 69.17°, as originally reported. However, the corresponding b* entry was typeset without its minus sign. The correct value is b* = −13.98. At first glance this row can appear internally inconsistent. As noted in the final paragraph of Sect.2.3.2, transmission spectral measurement (Fig.9) was acquired in a low signal-to-noise regime, reducing the blue–green contrast and yielding a negative b* for this slide. In other words, the ITA° value is correct for the measured data, and the issue was the missing minus sign on b*. We also note that although the computed ITA° classifies this entry as “very light,” the L* for the same row is very low (dark appearance); this discrepancy reflects the low-SNR conditions rather than a limitation of the ITA method. For clarity, the sign of ITA° follows the sign of. This correction does not change the results, figures, or conclusions of the article. The original article has been corrected.