N a hole in a piece of wood where a knot has been (木头上的)节孔
The improved Robert was used in the paper to outline the knot-hole so that the processing was almost on real time.
考虑到实际处理时的实时要求，应用改进后的罗泊特梯度算子来提取漏节的轮廓，使处理时间大大缩短。
If your hole ends up being a bit too big and the knots themselves don't hold the yarn in place, then tug on the yarn ends and stick some Popsicle sticks under the main knot to secure in place.
如果中间的孔太大，线结本身不能将毛线固定在合适的位置，那么可以用力拉毛线的末端，并将一些冰棒棍粘在毛线结下面加以固定。
Pull the ends of the ties through the hole, and tie a knot with the ends to create a loop for hanging.
将毛线打结的线头穿过纸板中间的孔，并将线头末端打结形成一个挂环。
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