Laser Triangulation System for the Measurement of Volume and Color of Wounds
Laser Triangulation System for the Measurement of Volume and Color of Wounds
复制标题
用于测量伤口体积和颜色的激光三角测量系统
DOI：
10.15221/11.010
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
J. Mozina
中科院分区：
文献类型：
--
作者：
U. Pavlovčič;M. Jezeršek;J. Mozina
为了精确测量伤口的体积和颜色，研制了一种小巧便携的旋转激光轮廓仪。该测量系统基于激光线三角测量和沿测量面旋转运动的原理。结果是一个物体的三维形状，彩色的。该系统通过测量参考物体的表面来校准。经变换参数计算，参考面与测量面差异的标准差为0.4 mm。测量范围为150x150x200mm。开发的软件用于数据采集和分析。它是一种基于颜色变化的半自动伤口边缘确定工具，使用NURBS表面进行虚拟健康皮肤近似。一旦根据颜色信息确定了伤口边缘，则只考虑伤口边界内的部分体积。通过这种方式，精度得到了显著提高。该算法基于先前发现的伤口边缘，自动确定虚拟健康皮肤的面积。体内伤口的测量结果表明，重复性主要依赖于虚拟健康皮肤的测定。该方法使计算体积的相对误差减小到10%以下。
A compact and portable rotational laser profilometer was developed for accurate measurement of the volume and color of wounds. The measuring system is based on the principle of laser-line triangulation and rotary motion along the measuring surface. The result is a 3D shape of an object, in color. The system is calibrated by measuring the surface of a reference object. The standard deviation of differences between the reference surface and the measurement was 0.4 mm after calculation of transformation parameters. The measuring range is 150x150x200 mm. The developed software is used for data acquisition and analysis. It is a tool for semi-automatic wound edge determination based on color variations using NURBS surface for the virtual healthy skin approximation. Once the wound edge is determined based on the color information, only the partial volumes within the wound boundaries are considered. In this way accuracy is significantly improved. The algorithm for automatic determination of the area of virtual healthy skin is based on the previously found wound edge. The results on the measurements of in-vivo wounds indicate that the repeatability is mostly dependent on the determination of the virtual healthy skin. By using this novel approach the relative error of the calculated volume was reduced under 10%.