Adjust the brightness and contrast of bufferedimage in Java

I'm using some frameworks to process a bunch of images. All I have is a bunch of buffered image objects Unfortunately, these images are really dark. I want to brighten them and adjust the contrast

It's like:

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

Any ideas?

Solution

It's actually very simple

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

A scaling factor of 1.2 and an offset of 15 seem to make the image brighter about the stop

right on!

Read more in the docs for rescaleop