例如，不要通过一个流来处理大图像，一个以文件名或图像ID形式指向图像的指针将大大减小业务流引擎中的开销。
Instead of e.g. passing large images through a flow, a pointer to the image in form of a file name or image id causes much less overhead in the business flow engine.
要设置一种颜色，在一个空的方块上单击，指针将变成一滴管，从图像选择一种颜色并用左键单击。
To set a color, click on an empty square, the pointer will be transformed into an eyedropper, and pick a color from the image with a left-click.
SUBDATASET的域包含一些列子资料组，一般，这些用于提供指针指向存储在单个多文件的图像的列表（比如，HDF文件或者NITF文件）。
The SUBDATASETS domain holds a list of child datasets. Normally this is used to provide pointers to a list of images stored within a single multi image file (such as HDF or NITF).
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