SJ-10蒸发对流实验液滴图像处理软件的研究与实现

发布时间：2018-05-27 07:25

本文选题：边缘检测 + 轮廓拟合　；参考：《中国科学院大学(中国科学院国家空间科学中心)》2017年硕士论文

【摘要】：本课题研究了实践十号卫星蒸发与流体界面效应实验中液滴图像的处理方法,根据其液滴图片特性,分析了液滴的高度、接触面半径、体积、表面积、表面张力和蒸发速率等物理参数的计算方法。该方法中主要包括图片裁剪、边缘检测和轮廓拟合几个主要部分。图片裁剪去除了边缘的显著噪声;边缘检测能够精确地获取压缩后的边缘信息;轮廓拟合包括拉普拉斯拟合、多项式拟合、椭圆拟合、指数拟合,主要用于边缘轮廓曲线的获取和接触角的计算。在拟合方法中,引入了牛顿-拉夫逊迭代法、坐标轮换法、最小二乘法等多种数值方法,解决了非对称液滴无法拟合或拟合不准确的问题,为非对称液滴接触角的测量提供了一种新思路。根据设计的液滴图像处理方法,作者开发了蒸发液滴图像处理软件,该软件能够可视化、批量化进行液滴图像的处理。实验结果表明,该软件能够将液滴的高度、接触面半径、体积、表面积的测量误差控制在5%以内,能够准确地计算液滴的接触角和表面张力,能够准确地拟合液滴图像。目前,SJ-10蒸发对流实验液滴图像处理软件已经成功应用在蒸发与流体界面效应空间实验的液滴图像处理上,同时该软件也应用在了地面金属液滴图像的处理上。
[Abstract]:This subject has studied the processing method of the droplet image in the experiment of the ten satellite evaporation and fluid interface effect experiment. According to the characteristics of the droplet picture, the calculation method of the physical parameters, such as the height of the droplet, the radius of the contact surface, the volume, surface area, surface tension and the evaporation rate, is analyzed. The method mainly includes the cutting of the picture, the edge detection and the wheel. The edge detection can accurately obtain the edge information after the compression, and the contour fitting includes Laplasse fitting, polynomial fitting, ellipse fitting, exponential fitting, mainly used for the acquisition of edge contour curves and the calculation of contact angle. In fitting method, it is introduced. Newton Raphson iterative method, coordinate rotation method and least square method have been used to solve the problem that asymmetric droplets can not fit or fit inaccurately. It provides a new idea for the measurement of asymmetrical droplet contact angle. Based on the design of droplet image processing method, the author developed the software for the evaporation of droplet image processing. The experimental results show that the software can control the height of droplets, the radius of the contact surface, the volume, the surface area of the measurement error within 5%. It can accurately calculate the contact angle and surface tension of the droplets, and can accurately fit the droplet image. At present, the SJ-10 evaporation convection experiment liquid drop diagram Image processing software has been successfully applied to the liquid droplet image processing of the evaporation and fluid interface effect space experiment, and the software is also applied to the processing of the surface metal droplet images.
【学位授予单位】：中国科学院大学(中国科学院国家空间科学中心)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP317.4

【相似文献】