问题描述
我有一张我调整大小的图片:
I have an image which I resize:
if((width != null) || (height != null))
{
try{
// scale image on disk
BufferedImage originalImage = ImageIO.read(file);
int type = originalImage.getType() == 0? BufferedImage.TYPE_INT_ARGB
: originalImage.getType();
BufferedImage resizeImageJpg = resizeImage(originalImage, type, 200, 200);
ImageIO.write(resizeImageJpg, "jpg", file);
} catch(IOException e) {
System.out.println(e.getMessage());
}
}
这是我调整图片大小的方法:
This is how I resize the image:
private static BufferedImage resizeImage(BufferedImage originalImage, int type,
Integer img_width, Integer img_height)
{
BufferedImage resizedImage = new BufferedImage(img_width, img_height, type);
Graphics2D g = resizedImage.createGraphics();
g.drawImage(originalImage, 0, 0, img_width, img_height, null);
g.dispose();
return resizedImage;
}
现在的问题是,我还需要保持宽高比。也就是说,我需要新的200/200图像来包含缩放的新图像。这样的事情:
Now the problem is, I also need to maintain aspect ratio. That is, I need the new 200/200 image to contain the new image scaled. Something like this:
我尝试了一些东西,但是他们没有按预期工作。
任何帮助表示赞赏。非常感谢。
I tried some things but they didn't work out as expected.Any help is appreciated. Thanks alot.
推荐答案
我们走了:
Dimension imgSize = new Dimension(500, 100);
Dimension boundary = new Dimension(200, 200);
根据边界返回新尺寸的功能
Function to return the new size depending on the boundary
public static Dimension getScaledDimension(Dimension imgSize, Dimension boundary) {
int original_width = imgSize.width;
int original_height = imgSize.height;
int bound_width = boundary.width;
int bound_height = boundary.height;
int new_width = original_width;
int new_height = original_height;
// first check if we need to scale width
if (original_width > bound_width) {
//scale width to fit
new_width = bound_width;
//scale height to maintain aspect ratio
new_height = (new_width * original_height) / original_width;
}
// then check if we need to scale even with the new height
if (new_height > bound_height) {
//scale height to fit instead
new_height = bound_height;
//scale width to maintain aspect ratio
new_width = (new_height * original_width) / original_height;
}
return new Dimension(new_width, new_height);
}
如果有人还需要图片大小调整代码,。
In case anyone also needs the image resizing code, here is a decent solution.
如果您不确定上述解决方案来实现相同的结果。
If you're unsure about the above solution there are different ways to achieve the same result.
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