基于辐射标定的机械零件精密测量方法研究

Research on Precision Measurement of Machine Part Based on Radiometric Calibration

摘要: 提出了一种基于辐射标定的机械零件精密测量方法。通过辐射标定求出摄像机CCD传感器的响应函数，建立图像灰度值与传感器收集的辐射能量之间非线性映射关系，恢复了图像中机械零件的真实场景，使机械零件的边缘轮廓更加接近实际。实验表明，该方法有效地提高了机器视觉的测量精度，在机械零件非接触测量领域具有重要的意义。

Abstract: In this paper, a precision measurement method of machine part based on radiometric calibration was proposed. According to radiometric calibration, the response function of our camera’s CCD sensor was obtained, and the non-linear mapping relations between image gray value and the radiant energy of machine part were established. Based on this, the real size of machine part in image was restored. The experiments showed that this method can effectively improve the measurement accuracy, and it would be of great importance in non-contact measurement field of machine part.