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Feasibility of LED-Assisted CMOS Camera: Contrast Estimation for Laser Tattoo Treatment

Interdisciplinary Program of Marie-Bio, Electrical & Mechanical Engineering, Pukyong National University, Busan 48513, Korea
Bio-Health Research Center, Korea Photonics Technology Institute, Gwangju 61007, Korea
Bluecore Company Co. Ltd., Busan 48059, Korea
School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 06974, Korea
Department of Biomedical Engineering, Pukyong National University, Busan 48513, Korea
Authors to whom correspondence should be addressed.
Appl. Sci. 2018, 8(5), 661;
Received: 28 March 2018 / Revised: 19 April 2018 / Accepted: 21 April 2018 / Published: 25 April 2018
(This article belongs to the Section Optics and Lasers)
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Understanding the residual tattoo ink in skin after laser treatment is often critical for achieving good clinical outcomes. The current study aims to investigate the feasibility of a light-emitting diode (LED)-assisted CMOS camera to estimate the relative variations in tattoo contrast after the laser treatment. Asian mice were tattooed using two color inks (black and red). The LED illumination was a separate process from the laser tattoo treatment. Images of the ink tattoos in skin were acquired under the irradiation of three different LED colors (red, green, and blue) for pre- and post-treatment. The degree of contrast variation due to the treatment was calculated and compared with the residual tattoo distribution in the skin. The black tattoo demonstrated that the contrast consistently decreased after the laser treatment for all LED colors. However, the red tattoo showed that the red LED yielded an insignificant contrast whereas the green and blue LEDs induced a 30% (p < 0.001) and 26% (p < 0.01) contrast reduction between the treatment conditions, respectively. The proposed LED-assisted CMOS camera can estimate the relative variations in the image contrast before and after the laser tattoo treatment. View Full-Text
Keywords: contrast variation; CMOS; LED; tattoo treatment contrast variation; CMOS; LED; tattoo treatment

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Pham, N.T.; Song, W.; Kim, H.; Jung, J.H.; Park, S.; Kang, H.W. Feasibility of LED-Assisted CMOS Camera: Contrast Estimation for Laser Tattoo Treatment. Appl. Sci. 2018, 8, 661.

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