Transforming image's Origin

how can i transform an image’s origin to the lower left corner, so that the upper left corner
ist image_height and the lower right one is image_width?

You’re rendering onto that image? For one thing, you could set the AffineTransform of the Graphics2D using translation and so on (see the API).

i only saw there a way to translate the image but not to use only the first quadrant (only positive x/y values)…

If you are rendering onto the image, which by the way you didn’t say even though I asked, you could concatenate a number of simple affine transformations into one which will perform the desired transformation.