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Regional image analysis of the tongue color spectrum

Regional image analysis of the tongue color spectrum,10.1007/s11548-010-0492-x,International Journal of Computer Assisted Radiology and Surgery,Satosh

Regional image analysis of the tongue color spectrum   (Citations: 2)
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Purpose  Kampo medicine (Japanese traditional herbal medicine) can identify “Mibyou” (disease-oriented state) based on visual tongue inspection by a trained physician. Surface colors of uncoated tongue provide essential features. A hyperspectral imaging system which performs regional image analysis of the tongue color spectrum was developed to automatically inspect the uncoated tongue. Methods  Hyperspectral tongue surface images were acquired by a camera equipped with an integrating sphere. The color spectrum from 4 tongue areas—uncoated tongue, coated tongue, lip, and perioral areas—were quantified. The average spectrum of each area was determined and 4 images calculated by focusing on the differences between respective spectra; highlight, shadow, tongue coat, and lip-weighted images were calculated. The uncoated tongue area was extracted by subtraction. Results  Reproducibility was evaluated by applying the camera and extraction algorithm to 44 images from human subjects. Eighty-two percentage were judged as acceptable by a Kampo medicine physician expert. Conclusions  Using a hyperspectral camera and extraction algorithm, the tongue color of the uncoated part was automatically extracted. This technique is suitable for tongue color analysis and may help non-trained users to identify “Mibyou”.
Journal: International Journal of Computer Assisted Radiology and Surgery , vol. 6, no. 1, pp. 143-152, 2011
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    • ...Second, tongue area without coating was eliminated according to the spectral properties as previously described [5], [6]...
    • ...The spectral imaging system was prepared as previously described [6], [5]...
    • ...Then the image was processed with a median filter, kernel size = 5, to remove dot noise, and the pixels representing the tongue area without coating were picked out by the method previously described [6], [5] and error of picking was corrected manually...
    • ...In this algorithm, hyperspectral images of the tongue were acquired by the system previously described [6], [5], [9]...
    • ...Coating of the tongue, interfering with color analysis by its staining with colored foods, was clearly removed by the algorithm previously described [6], [5]...

    Satoshi Yamamotoet al. Early detection of disease-oriented state from hyperspectral tongue im...

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