求翻译：针对现有煤岩识别方法存在煤岩界面变化无规律时识别率低的问题，提出了一种基于机器视觉的煤岩界面信息提取方法。在煤和岩石物理力学性质差别不大，但灰度差异较大的情况下，在采煤机机身上安装的摄像头拍摄采煤面并定时从中提取一帧图像，经过预处理和特征提取获得煤岩界面曲线，进而获得其在图像中的像素坐标，再利用棋盘格标定板标定出摄像头参数，结合采煤机和采煤面特定的投影模型求解出像素坐标与实际成像角度之间的关系，最后可根据此关系求解煤岩界面的高度信息。通过将每一幅图像中求得的高度信息综合，最终可拟合出整个采煤面的煤岩界面信息，为采煤机姿态控制提供依据。是什么意思？

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For an existing coal rock identification methods exist coal rock interface changes when no pattern recognition rate is low, the idea of a machine-based visual coal rock interface information extraction methods. In the coal and rock physical mechanics varied nature of the small but gray with a great

In view of existing coal crag recognition methods existence coal crag contact surface change disorder when distinguishes rate the low question, proposed one kind based on the machine vision coal crag contact surface information extraction method.Is not big in the coal and the rock physics mechanical

For existing coal coal-rock interface recognition exists when there is no law of the low recognition rate of proposed coal-rock interface information extraction methods based on machine vision. In coal and rock physical mechanical nature difference is unlikely to, but gray differences larger of situ

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