用Java调整BufferedImage的亮度和对比度
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Adjust brightness and contrast of BufferedImage in Java
提问by a paid nerd
I'm processing a bunch of images with some framework, and all I'm given is a bunch of BufferedImageobjects. Unfortunately, these images are really dim, and I'd like to brighten them up and adjust the contrast a little.
我正在用一些框架处理一堆图像，而我得到的只是一堆BufferedImage对象。不幸的是，这些图像真的很暗，我想将它们调亮并稍微调整一下对比度。
Something like:
就像是：
BufferedImage image = something.getImage();
image = new Brighten(image).brighten(0.3); // for 30%
image = new Contrast(image).contrast(0.3);
// ...
Any ideas?
有任何想法吗？
采纳答案by a paid nerd
That was easy, actually.
这很容易，实际上。
RescaleOp rescaleOp = new RescaleOp(1.2f, 15, null);
rescaleOp.filter(image, image); // Source and destination are the same.
A scaleFactorof 1.2 and offsetof 15 seems to make the image about a stop brighter.
scaleFactor1.2 和offset15 的A似乎使关于停止的图像更亮。
Yay!
好极了！
Read more in the docs for RescaleOp.
在文档中RescaleOp阅读更多信息。
