Java中调整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，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.

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.

类似于:

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

有什么想法吗?

推荐答案

其实很简单.

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

1.2 的 scaleFactor 和 15 的 offset 似乎使关于停止的图像更亮.

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

耶！

在 RescaleOp.

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