求翻译：但由于棉花异性纤维含量极少，且经过开松以后变得较为细碎，使目标与背景间的对比度较低，因此基于边界的分割方法不适于处理棉花异性纤维图像。是什么意思？

However, due to the cotton the heterosexual fiber content is minimal, and after the opening song become more fragmented, low contrast between target and background boundary-based segmentation method is not suitable for processing the image of foreign fibers of cotton.

But the heterosexual cotton fiber content is extremely low, and after the song has become more difficult to target and background, the contrast between a relatively low, so the Border segmentation method based on inadequate to address heterosexual cotton fiber images.

正在翻译，请等待...

But because of the content of foreign fibers in cotton is extremely small, and became more fine after opening, low contrast between the target and background, so segmentation method based on boundary does not apply to process cotton fibers of the opposite sex images.

正在翻译，请等待...