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. 2023 May 17;13(10):1767. doi: 10.3390/diagnostics13101767

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Study scheme. (i) Capturing the two patterns (straight and upturned eyes) of facial RGB images using an iPhone SE. (ii) Compensating via background masking, noise reduction, and adjustment luminance. (iii) Conversion to an HSL image. (iv) Detecting the eyes. (v) Measuring pixels for each hue degree. (vi) Extracting the maximum hue degree. The algorithm processing from (ii) to (iv) is called ABHB. ABHB, Algorithm Based on Human Brain; HSL, Hue Saturation Luminance; and RGB, Red Green Blue.