ACCURATE MEASUREMENT OF TOOTH COLOR AND TRANSLUCENCY

描述：此应用程序的特定目标是开发一个 独立于设备的测量系统，用于测量颜色和半透明 人类的牙齿。准确测量牙齿颜色和半透明程度 对于修复体手术中的牙齿匹配来说是必不可少的。如此准确的 和设备无关的技术也可以用来评估 漂白程序的有效性。在这个项目中，一台光谱辐射计 以及标准的颜色测试目标将被用于确定 激光雷达照明源和传感器的光谱特性 数码相机。校准将分两步完成：1)测量 光源的光谱特性(观察室和 电子闪光灯)；2)从相机红-绿-蓝转换 (RGB)设置为与设备无关的颜色集。要获得颜色变换，请执行以下操作 在摄像机中，将使用一组已知颜色分量的测试目标。每个人 测试对象分两次测量：1)使用被标定的数码相机； 2)使用高精度的光谱辐射计。这台光谱辐射计提供 作为参考标准。校准过程中涉及的步骤如下 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和 150颗拔除的牙齿的半透明程度，并与 光谱辐射测量。将设计一个图形用户界面，它可以用来 测量斑点/区域/区域的颜色并获得最佳的色调匹配。在以下方面取得成功 这一步骤不仅允许在临床阶段对该技术进行测试 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，但也 对数码口腔内相机进行评估，以完成这项任务。 建议的商业应用：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