基于二维图像的距离测量方法

Measuring Method Based on 2D Image

针对传统的直接接触测量方式在操作和使用上无法满足自动化等问题,为了提高测量的精度和效率,提出基于图像的非接触式测量距离方法。首先在场景中添设一把带有刻度的刻度尺,并将刻度尺横在被测物体之间;然后利用摄像机对场景进行拍摄,获得场景的真实图像,对获得的图像进行相关处理并标出刻度;最后通过公式计算出被测物体的距离,并与游标卡尺所测的距离进行对比分析。该方案在测距的过程中省略了图像的相机标定、图像矫正等一系列复杂步骤,从而避免了处理图像时的误差,有效提高了数字化测量的精度和效率。研究结果表明,通过比较试验数据与游标卡尺测量的数据,基于非接触式测量距离方法切实有效、适应性好、测距精度高,与传统的检测方法相比,检测效果有提高。

For direct contact with the traditional way of measuring on the operation and use cannot satisfy the problem such as automation,in order to improve the measuring precision and efficiency,based on image non-contact distance measurement method is proposed. In the first place in the scene with adding a calibration scale,and the scale between the object under test. Then use the camera to the scene,scene real images. To get mark scale＇s image in image processing. Finally,the formula to calculate the actual distance of the object to be tested,analysis compare with vernier caliper measure distance.The scheme in the process of ranging omitted image of camera calibration,image correction and so on a series of complex steps,avoiding the processing error of the image,effectively improves the digital measurement accuracy and efficiency. The results indicated that by comparing the test data and vernier caliper actual measurement data,based on the non-contact ranging method is practical and effective,good adaptability,high measure precision,conform to the requirements of the actual industrial production.