我们假设您想要进行一些清理并删除一张图像。
Let's say you want to do some house-cleaning and delete an image.
有时，我需要在一张图像或一块空白画布上绘制几根线条和一些文本。
Sometimes I need to draw a few lines or some text on an image or a blank canvas.
第一张图像是云顶数据，而第二张图像是要划分层次的源数据。
The first image is the cloud-tops data, and the second image is the source to split into tiles.
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