edge extract的用法和樣例：
例句
- Especially in the edge extraction, the speckle noise makes none of the conventional extraction algorithms get good result.
特別是對於邊緣提取，斑點雜訊使得傳統的提取演算法幾乎都無法取得理想的效果。 - Combined with pattern matching, this new method could increase the precision of transferring the result of edge extraction from one slice to another.
結合匹配技術，提高邊緣提取結果層間傳遞的精度。
