Increase PPI on BufferedImage

Question

Is it possible to control the PPI (I want to increase it) on a BufferedImage? I use ImageIO.write to write the BufferedImage to a ByteArrayOutputStream.

Answer 1

No, not directly. A BufferedImage consists of only pixel data (raster), a sample model and a color model. It has no knowledge of PPI/DPI.

But if the format you are writing supports setting PPI/DPI, you can typically control this by passing the proper IIOMetadata along with the image to the ImageWriter when writing.

See this answer for how to do this for JPEG.