利用MATLAB图像处理工具箱进行图形数字化的研究

Study of using the image processing toolbox of MATLAB to digitize graph

针对研究的利用MATLAB图像处理工具箱处理实验输出图形、获取图线坐标值、使图形数字化的过程,通过对一构件振动位移测试结果图形的处理,证明此方法取点密集、返回坐标值精确度高,且整个过程可以通过MATLAB语言自动完成,比人工取点的处理方法省时、省力,数据误差小。

The paper studies the process using the image processing toolbox of MATLAB to digitize graph and get coordinates of the curve. Through applying it to an output graph of component vibration displacement experiment, it is proved that this method could get serried and precise coordinates of points on curve. The whole process can be finished automatically by using the MATLAB language. Compared with the manual method, this method is facile and makes little error of experiment data.