利用数字图像处理技术，通过轨道板图像自动分割、边缘提取、轨道板固有结构边缘去除、真伪裂纹区分等步骤，设计了轨道板裂纹缺陷自动检测识别算法。通过对实际采集的轨道板图像的处理，证明该方法能够准确提取和标记缺陷区域。在实验的 1 000幅图像中，人工检出裂纹图像 6幅，自动识别裂纹图像 6幅，准确率达到 100 %，算法运行速度经测试能够满足实时检测的需求。

The algorithm for automatic crack detection and identification in slab track images is designedbased on digital image processing technology and many procedures such as image auto-segmentation, edge extrac.tion, edge removing of slab track structure and false crack identification. The algorithm has been proved accuratelyin extracting and marking the crack region by applying to slab track images from actual acquisition. In the experi.ment of 1000 images, all the six manually detected crack images are also detected automatically by the algorithm, i.e., the accuracy rate is 100%. The computational speed of the algorithm can satisfy the real-time detection require. ments.