前面有人建议在这里学英语的，那我就来了——图像处理的

2dmin

An image mask isolates parts of an image for processing. If a function has an image mask parameter, the function process or analysis depends on both the source image and the image mask.
Image mask 分理出图像中用来处理的部分。如果一个函数有image mask 参数，这个函数的处理或者分析则依据源图像和image mask。
An image mask is an 8-bit binary image that is the same size as or smaller than the inspection image. Pixels in the image mask/ determine /whether corresponding pixels in the inspection image are processed. If a pixel in the image mask has a nonzero value, the corresponding pixel in the inspection image is processed. If a pixel in the image mask has a value of 0, the corresponding pixel in the inspection image is not processed.
一个image mask 是一幅8位的二进制图像，和所检测的图像大小相同或者小一些。Image mask中的像素值决定了被检测图像符合像素值的是否被处理。如果image mask中有一个像素由非零值，检测图片中相应的像素就被处理。如果一个像素在image中的值为0，则被检测图像中的相应像素不会被处理。

有关Image mask是啥东东？没搞台明白！ 还有些翻译自己搞的很别扭。
英语好的帮忙看看。