Error Detection Method of Image and Graphic Dynamic Registration
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摘要: 针对零件加工精度检测要求较高、检测环境复杂，提出了一种新型的加工精度检测方法。通过动态调整被检测零件的三维设计图形的空间位姿，使调整后的图形空间位姿与工业相机采集到的被检测零件的高质量图像处于同一拍摄角度，保存零件此时的三维设计图形的空间位姿图像，使用改进后的SIFT-Harris算法将采集到的零件高质量图像与保存的空间位姿图像实现配准, 进而实现零件与其对应的三维设计图形尺寸的对比检测。通过实验测试表明：本文提出的图像与图形动态配准的误差检测方法，具有较高的精度和速度，并且检测精度符合误差分布概率，对加快误差检测技术的发展具有一定的推动和探索意义。Abstract: Aiming at the requirements of the highaccuracy and the complicated detection environment in the processing detection, a new method of processing detection accuracy was proposed. By dynamically adjusting the spatial position of the 3D design graphics of the detected part, the adjusted spatial position of the graphics and the high-quality image of the detected part collected by the industrial camera are at the same shooting angle, and the 3D design graphics of the part at this time are saved for the spatial pose image, the improved SIFT-Harris algorithm is used to register the high-quality image of the part and the saved spatial pose image, thereby realizing the contrast detection of the part and its corresponding 3D design graphic size. The experimental test shows that the error detection method of dynamic registration of images and graphics has high accuracy and efficiency, and the detection accuracy accords with the probability of error distribution, which has certain promotion and exploration significance for accelerating the development of error detection technology.
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Key words:
- industrial camera /
- images and graphics /
- dynamic registration /
- error detection
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表 2 实验一检测数据
序号 像点的像方坐标 物点的物方空间坐标 欧拉角 ① （627，567） （625，570，50） （−0.0001，0.0034，3.1149） ② （675，910） （679，915，49） ③ （514，776） （514，776，65） 
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表 3 实验二检测数据
序号 像点的像方坐标 物点的物方空间坐标 欧拉角 ① （629，673） （616，681，59） （−0.0013，1.0216，3.1086） ② （639，883） （653，915，50） ③ （613，659） （639，806，50）
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表 6 配准算法实验数据对比
使用算法 对比指标 实验一 实验二 SIFT 配准精度/% 80.76 85.36 配准时间/s 5.3 6.1 改进的SIFT-Harris 配准精度/% 85.71 88.23 配准时间/s 4.6 5.7
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表 8 实验一检测数据
序号 元素 面积/mm2 周长/mm 离心率 1 外轮廓 1256.306 186.932 无 2 圆 193.861 23.407 0.450 3 圆 198.398 25.910 0.383 4 圆 196.532 24.541 0.139 5 圆 195.614 23.394 0.405
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表 9 实验二检测数据
序号 元素 面积/mm2 周长/mm 离心率 1 外轮廓 1252.530 185.230 无 2 圆 193.161 24.205 0.395 3 圆 198.026 25.013 0.153 4 圆 198.528 25.114 0.106 5 圆 194.916 24..890 0.598
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表 10 检测数据
$3\sigma $ 准则分析数据名称 实验一 实验二 面积/mm2 周长/mm 离心率 面积/mm2 周长/mm 离心率 平均值μ 196.101 24.313 0.344 196.158 24.777 0.313 均方差б 1.890 1.193 0.140 2.558 0.498 0.228 μ-3б 190.431 20.734 −0.075 188.484 23.283 −0.372 μ+3б 201.771 27.891 0.763 203.832 26.272 0.998
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