java 如何从缓冲图像中获取子图像
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How to get sub image from buffered image
提问by Jagan
We can get a sub image from BufferedImage using getSubimage(int,int,int,int),
but my problem is I want to get exact subimage(rectangle image) by passing double values as widthand height. Is there any alternative for that ?
我们可以使用 BufferedImage 获取子图像getSubimage(int,int,int,int)，但我的问题是我想通过将 double 值传递为widthand来获得精确的子图像（矩形图像）height。有什么替代方法吗？
回答by camickr
cast the double values to int.
将双精度值转换为 int。
getSubImage((int)x, (int)y, (int)width, (int)height);
and as @camickr mentioned The internal cells will still be represented by integerpixel values. If each cell is 5 pixels square. The first cell starts at (0, 0), the second cell starts at (5, 0) etc...
正如@camickr 所提到的，内部单元格仍将由整数像素值表示。如果每个单元格是 5 个像素的正方形。第一个单元格从 (0, 0) 开始，第二个单元格从 (5, 0) 开始，等等......
