How to convert between color models

Question

I am very new to image processing. I have a PNG image (read using ImageIO.read()) that yields BufferedImage.TYPE_CUSTOM when I call getType()

Answer 1

Try this:

public static BufferedImage convert(BufferedImage src, int bufImgType) {
    BufferedImage img= new BufferedImage(src.getWidth(), src.getHeight(), bufImgType);
    Graphics2D g2d= img.createGraphics();
    g2d.drawImage(src, 0, 0, null);
    g2d.dispose();
    return img;
}