The amorphous blob in the bottom left is pixel data indicating the cloud-top heights from a selected portion of the full image.
位于左下角的无序斑点是表示来自整张图像中所选部分的云顶高度的像素数据。
You indicate a stretchable section by drawing one (or more) 1-pixel-wide black line (s) in the left and top part of the border (the other border pixels should be fully transparent or white).
你可以在左部和上部使用1宽度的黑线来定义可伸缩的区域(其它边框必须是完全透明或者白色)。
Most image generation algorithms scan image pixels according to top-to-bottom and left-to-right scanning; calculate the value of every pixel.
大多数的图像生成算法,都是按照从上到下从左到右的顺序扫描图像,计算每个像素点的颜色值。
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