骰子作画

package Hebut_HappyBirthday;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.lang.invoke.ConstantCallSite;
import java.util.ArrayList;

import javax.imageio.ImageIO;

public class HebutHappyBirthday {
	public BufferedImage hebutImg;
	public static int rgb2gray(int argb) {
		int alpha = (argb >> 24) & 0xFF;
		int red = (argb >> 16) & 0xFF;
		int green = (argb >> 8) & 0xFF;
		int blue = argb & 0xFF;
		return (int)(0.3*red + 0.59*green + 0.11*blue);
	}
	
	public static int sixStepGary(int x) {
		int i;
		int c = 256/10;
		for(i = 0; i <= 9; i++) {
			if(i*c < x && x <= (i+1)*c) return i;
		}
		return 9;
	}
	public static String getXChar(int x, int i) {
		 String str[] = new String[10];
		 str[0] = "   "; str[1] = "  0"; str[2] = "0 0";
		 str[3] = "0  "; str[4] = "0 0"; str[5] = "000";
		 if(x == 0 || (x == 1 && i != 2) || (x == 2 && i == 2) || (x == 4 && i == 2)) 
			 return str[0];
		 if((x == 2 && i == 1) || (x == 3 && i == 1)) 
			 return str[1];
		 if(i == 2 && (x == 1 || x == 2 || x == 3 || x == 5)) 
			 return str[2];
		 if(i == 3 && (x == 2 || x == 3)) 
			 return str[3];
		 if((x == 8 && i == 2) || x == 6 || (x == 7 && (i == 1 || i == 3)) || (x == 5 && (i == 1 || i == 3)) || x == 4) 
			 return str[4];
		 if(x == 9 || (x == 8 && (i == 1 || i == 3)) || (x == 7 && i == 2)) 
			 return str[5];
		 return null;
	}
	public HebutHappyBirthday() throws Exception {
		hebutImg = ImageIO.read(new File("/media/hejun/新加卷/hebut520.jpg"));
		final int MAX_N = 10000;
		int i,j,k,l,ii,jj = 0,kk,ll,n = 1;
		int[][] rgb = new int[MAX_N][MAX_N];
		int[][] ansrgb = new int[MAX_N][MAX_N];
		int width = hebutImg.getWidth();
		int height = hebutImg.getHeight();
		int minx = hebutImg.getMinX();
		int miny = hebutImg.getMinY();
		//System.out.println(minx + " " + miny + " " + width + " " + height);
		for(i = minx; i < height; i++) {
			for(j = miny; j < width; j++) {
				rgb[i][j] = rgb2gray(hebutImg.getRGB(j, i));//获得像素值
			}
		}
		int sum,count;
		for(i = minx, ii = 0; i < height; i += n, ii++) { 
			for(j = miny, jj = 0; j < width; j += n, jj++) {
				sum = count = 0;
				for(k = i, kk = 0; kk < n && k < height; k++, kk++) {
					for(l = j, ll = 0; ll < n && l < width; l++, ll++) {
						sum += rgb[k][l];
						count++;
					}
				}
				ansrgb[ii][jj] = sixStepGary(sum/count);
			}
		}
		String str;
		for(i = 0; i < ii; i++) {
			for(k = 1; k <= 3; k++) {
				str = "";
				for(j = 0; j < jj; j++) {
					str += getXChar(ansrgb[i][j], k);
				}
				System.out.println(str);
			}
		}
	}
	public static void main(String[] args) throws Exception {
		HebutHappyBirthday hebutHappyBirthday = new HebutHappyBirthday();
	}
}