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    • 52. 发明授权
    • Method for identification of dental caries in polychromatic images
    • 多色图像中龋齿鉴别方法
    • US08311302B2
    • 2012-11-13
    • US12965945
    • 2010-12-13
    • Jiayong YanWei WangLiangliang PanVictor C. Wong
    • Jiayong YanWei WangLiangliang PanVictor C. Wong
    • G06K9/00
    • A61B5/0088G06T5/002G06T7/11G06T2207/10024G06T2207/20016G06T2207/20036G06T2207/30036
    • A method for identification of caries, executed at least in part on data processing hardware, obtains an original digital tooth image that has a plurality of color channels and generates an adjusted image by adjusting intensity values of the original digital tooth image to a range between a minimum value and a maximum value, wherein the adjusted image has at least a green channel image Iwgreen, a red channel image Iwred, and a blue channel image Iwblue. One or more tooth regions are segmented from gum and background regions within the adjusted image according to a relationship between two or more of the images Iwgreen, Iwred, and Iwblue to each other. One or more caries lesions is identified according to pixel intensity values from within the one or more segmented tooth regions, and the one or more tooth regions and the displayed and identified caries regions are highlighted.
    • 一种用于识别龋齿的方法,至少部分地在数据处理硬件上执行,获得具有多个颜色通道的原始数字牙齿图像,并通过将原始数字牙齿图像的强度值调整到一个 最小值和最大值,其中调整后的图像至少具有绿色通道图像Iwgreen,红色通道图像Iwred和蓝色通道图像Iwblue。 根据两个或多个图像Iwgreen,Iwred和Iwblue之间的关系,调整后的图像中的一个或多个齿区域从胶和背景区域分割。 根据来自一个或多个分段齿区域内的像素强度值来识别一个或多个龋齿病变,并且突出显示和识别的龋齿区域。
    • 60. 发明授权
    • Dental shade mapping
    • 牙科阴影贴图
    • US08208704B2
    • 2012-06-26
    • US12834927
    • 2010-07-13
    • Victor C. WongJames R. Milch
    • Victor C. WongJames R. Milch
    • G06K9/00
    • G01J3/46G01J3/0264G01J3/462G01J3/463G01J3/50G01J3/501G01J3/508G01J2003/466
    • A method and apparatus for obtaining a color mapping of a dental object. Illumination is directed toward the object over at least first, second, and third wavelength band, one band at a time. An image of the dental object is captured at each wavelength band to form a set of images of the dental object. For pixels in the captured set of images, an image data value for the pixel corresponds to each of the wavelength bands and calculates interpolated image data values proportional to the spectral reflectance of the dental object, according to the obtained image data values and according to image data values obtained from a reference object at the wavelength bands. Spectral distribution data for a viewing illuminant is obtained and the visual color of the dental object reconstructed according to the calculated interpolated image data values and the obtained spectral distribution of the viewing illuminant.
    • 一种用于获得牙科物体的颜色映射的方法和装置。 照亮在至少第一,第二和第三波长带,一次一个频带上朝向物体。 在每个波长带处捕获牙科物体的图像以形成牙科物体的一组图像。 对于所拍摄的图像集合中的像素,像素的图像数据值对应于每个波长带,并且根据获得的图像数据值并根据图像计算与牙科对象的光谱反射率成比例的内插图像数据值 在波长带从参考对象获得的数据值。 获得用于观察光源的光谱分布数据,并且根据所计算的内插图像数据值和所获得的观察光源的光谱分布重建牙科物体的视觉颜色。