这个软件工作的原理及步骤（我的理解）是：

1. 首先将你的图设置成bmp或tiff然后设成灰度（在photoshop或acdsee中完成）

2. 根据灰度设置一个threshold（临界值）给软件，那么它就认为低于该值的像素点不是particle，并且高于该值的点全为particle，从而锐化particle的边缘

-This software and steps work in principle (I understand) are: 1. First of all your plans set bmp or tiff and then set to gray (in photoshop or acdsee completed) 2. According to Gray to set up a threshold (critical value ) to the software, then it is considered to be below the value of the pixel is not a particle, and the whole point is higher than the value for the particle, and thus sharpening the edge of particle