private BufferedImage convert(BufferedImage image, int imageType) {
if (image.getType() == imageType) {
return image;
}
int w = image.getWidth();
int h = image.getHeight();
BufferedImage newImg = new BufferedImage(w, h, imageType);
ColorSpace srcSpace = image.getColorModel().getColorSpace();
ColorSpace newSpace = newImg.getColorModel().getColorSpace();
ColorConvertOp convert = new ColorConvertOp(srcSpace, newSpace, null);
convert.filter(image, newImg);
return newImg;
}
/**
* Simple method to use if one wants to change the current color scheme to e.g grayscale,
* black/white and so on
*
* @param source source image object
* @param colorSpaceType color space type. see java.awt.color.ColorSpace.<TYPES>
* @param <T> type
* @return BufferedImage
* @throws IOException _
* @throws NullPointerException _
*/
public static <T> BufferedImage convertColorScheme(final T source, final Integer colorSpaceType)
throws IOException, NullPointerException {
if (verifyNotNull(source, colorSpaceType)) {
BufferedImage sourceImage;
sourceImage = convertToBufferedImage(source);
BufferedImage target =
new BufferedImage(sourceImage.getWidth(), sourceImage.getHeight(), sourceImage.getType());
if (verifyNotNull(sourceImage)) {
ColorSpace colorSpace = ColorSpace.getInstance(colorSpaceType);
ColorConvertOp converter = new ColorConvertOp(colorSpace, null);
target = converter.filter(sourceImage, target);
if (verifyNotNull(target)) {
return target;
}
throw new NullPointerException("Unable to create target image. Result was null");
}
}
throw new NullPointerException(E_OBJECT_WAS_NULL);
}