调整Java中BufferedImage的亮度和对比度 [英] Adjust brightness and contrast of BufferedImage in Java

问题描述

我正在用一些框架处理一堆图像，而我给出的只是一堆 BufferedImage 对象。不幸的是，这些图像真的很暗淡，我想照亮它们并调整对比度。

类似于：

  BufferedImage image = something.getImage（）; 
 image = new Brighten（image）.brighten（0.3）; //为30％
图片=新对比度（图片）.contrast（0.3）; 
 // ... 
  

有什么想法？
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  RescaleOp rescaleOp = new！解决方案

RescaleOp（1.2f，15，null）;
rescaleOp.filter（image，image）; //源和目标是相同的。


A scaleFactor 为1.2和<$ c $ b> $偏移 15似乎使图像停止更明亮。

Yay！

请阅读文档 RescaleOp 。

I'm processing a bunch of images with some framework, and all I'm given is a bunch of BufferedImage objects. Unfortunately, these images are really dim, and I'd like to brighten them up and adjust the contrast a little.

Something like:

BufferedImage image = something.getImage();
image = new Brighten(image).brighten(0.3); // for 30%
image = new Contrast(image).contrast(0.3);
// ...

Any ideas?

解决方案

That was easy, actually.

RescaleOp rescaleOp = new RescaleOp(1.2f, 15, null);
rescaleOp.filter(image, image);  // Source and destination are the same.

A scaleFactor of 1.2 and offset of 15 seems to make the image about a stop brighter.

Yay!

Read more in the docs for RescaleOp.

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