/**
* A factory object which creates a histogram object for an image.
*
* @param fileName the file name of the image to compute a histogram.
* @return A histogram object for the specified image.
* @throws IOException if the specified image file does not exists or there is some problem
* reading it.
*/
public static Histogram getHisrogram(String fileName) throws IOException {
File f = new File(fileName);
BufferedImage img = ImageIO.read(f);
Histogram h = new Histogram(fileName);
// h.parseGrayHistogram(img);
h.parseHistogramForColors(img);
return h;
}
