15 July 2015 Contrast enhancement based on entropy and reflectance analysis for surgical lighting
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Light-emitting diode (LED) is the neotype surgical lighting device as an inexpensive and color-variable illumination. A methodology was designed to value the quality of surgical lighting and used to develop an operation lamp with LEDs enhancing the biological contrast. We assembled a modular array of Phillips LEDs as illumination. In the initial experiment, images of porcine heart were carried out in several LED environments and analyzed quantitatively to assess the function of these LEDs in contrast enhancement. Then we measured the reflectance spectrums of blood, fat and other tissues to obtain the spectral comparison. Based on the result, new illuminations with spectral components which differ most in the comparison was developed. Meanwhile, a new evaluation function combining the entropy analysis and brightness contrast was also built to value the quality of these illuminations. Experiments showed biological features are more visible with treated LED illuminations than the broadband lamps. Thus, the synthesis of LED lighting spectra could be adjusted to provide significant tissue identification. Therefore, we believe the new methodology will contribute to the manufacture of high efficient medical illuminations and act the positive role in coming surgical lighting fields.
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Junfei Shen, Junfei Shen, Huihui Wang, Huihui Wang, Yisi Wu, Yisi Wu, An Li, An Li, Chi Chen, Chi Chen, Zhenrong Zheng, Zhenrong Zheng, } "Contrast enhancement based on entropy and reflectance analysis for surgical lighting", Proc. SPIE 9537, Clinical and Biomedical Spectroscopy and Imaging IV, 95371O (15 July 2015); doi: 10.1117/12.2183661; https://doi.org/10.1117/12.2183661

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