ACCURATE MEASUREMENT OF TOOTH COLOR AND TRANSLUCENCY

描述：该应用程序的具体目标是开发一个 独立于设备的测量系统，用于测量 人类的牙齿准确测量牙齿颜色和半透明度是 在修复过程中对牙齿匹配至关重要。如此精确 设备无关技术也可用于评估 漂白程序的有效性。在这个项目中， 沿着标准颜色测试目标将用于确定 的照明光源和CCD传感器的光谱特性， 数码相机校准将通过两个步骤实现：1）测量 光源的光谱特性（观察室和 电子闪光灯）; 2）获得从相机红-绿-蓝的变换 (RGB)到设备独立的颜色设置。为了获得颜色变换， 对于照相机，将使用一组已知颜色分量的测试目标。每个 对测试目标进行两次测量：1）使用待标定的数码相机; 和2）使用高精度分光辐射计。分光辐射计 作为参考标准。校准程序中涉及的步骤将 被封装在计算机程序中，该程序自动计算最终的 变换矩阵这种方法将用于测量颜色， 对150颗离体牙的牙本质进行了研究，并与 分光辐射测量将设计一个GUI，可用于 测量斑点/区域/面积的颜色，并获得最佳的色调匹配。成功 这一步骤不仅可以在临床上测试该技术， 2，其中还计划评估系统在测量方面的能力， 牙齿外观的其他方面，如荧光，而且 评估数字口内摄像机用于这项任务。 拟议商业应用：不可用

DESCRIPTION: The Specific Aim of this application is to develop a device-independent measurement system to measure the color and translucency of human dentition. Accurate measurement of tooth color and translucency is essential for tooth matching in the restorative procedures. Such an accurate and device-independent technique also can be used in assessing the effectiveness of bleaching procedures. In this project, a spectroradiometer along with the standard color test targets will be used to determine the spectral characteristics of the illumination source and the CCD sensor of a digital camera. The calibration will be achieved in two steps: 1) measuring the spectral characteristics of the light sources (a viewing booth and an electronic flash); 2) obtaining a transformation from camera red-green-blue (RGB) to a device-independent color set. To obtain the color transformation for the camera, a set of test targets of known color components will be used. Each test target is measured twice: 1) using the digital camera to be calibrated; and 2) using a highly accurate spectroradiometer. The spectroradiometer serves as the reference standard. The steps involved in the calibration procedure will be encapsulated in a computer program, which automatically computes the final transformation matrix. This approach will be used to measure color and translucency of 150 extracted teeth and compare them with the spectroradiometric measurements. A GUI will be designed which can be used to measure color of spots/regions/area and obtain the best shade match. Success in this step will allow not only the testing of the technique, clinically in Phase 2, wherein there are also plans to assess capability of the system in measuring other aspects of tooth appearance, such as fluorescence, but also the evaluation of a digital intraoral camera for this task. PROPOSED COMMERCIAL APPLICATION: NOT AVAILABLE