Luminance Compensation based on Background Shadow for White-Pill Identification

PHAKDEE, SUKPORNSAWAN and SOMCHART, CHOKCHAITAM (2018) Luminance Compensation based on Background Shadow for White-Pill Identification. In: Sixth International Conference on Advances in Bio-Informatics, Bio-Technology and Environmental Engineering - ABBE 2018, 28-29 April, 2018, Zurich, Switzerland.

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Pill color is applied as one of important features for pill identification; however, most of pill color is white. It’s difficult to classify two similar white pills because pill’s color is sensitive to luminance intensity. To reduce its luminance-intensity effect, RGB color is converted in term of YUV component because when its luminance intensity is increased, only its Y value is increased but its U and V values are almost constant. Therefore, its U and V values can be directly applied for image recognition. In this report, we propose luminance compensation based on background shadow to compensate luminance-intensity effect in Y value. When its luminance intensity is increased, Y value of background is also increased but Y value of pill shadow is slightly decreased. Therefore, difference between Y value of background and its shadow is effectively applied for luminance compensation. Experimental results confirm an effectiveness of our proposed compensation method.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: —Pill Identification, Shadow background, Luminance compensation, Digital image recognition, YUV
Depositing User: Mr. John Steve
Date Deposited: 08 Mar 2019 14:55
Last Modified: 08 Mar 2019 14:55

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