利用ImageJ将验证码去噪、二值。图片切割

public static void main(String[] args) throws FileNotFoundException, IOException
	{
		String savepath = "D:\\myworkspace\\Ftp\\csdn\\44.bmp";
		
		//打开图片
		IJ.open("D:\\myworkspace\\Ftp\\csdn\\4.bmp");   
		
		//设置大小
		//IJ.run("Size...", "width=30 height=30 constrain interpolate");
		
		//去噪
		//IJ.run("Remove Outliers...", "radius=2 threshold=50 which=Dark");
		IJ.run("Despeckle");
		
		//二值
		IJ.run("Make Binary");
		

		
		//另存图片
		IJ.save(savepath);
		
		//读取另存图片
		BufferedImage img = ImageIO.read(new FileInputStream(savepath));
		
		//切割
		BufferedImage[] bimg = cutter(img);
		
		for(int i = 0; i < bimg.length; i++)
		{
			if(bimg[i] != null)
				ImageIO.write(bimg[i], "BMP", new File("D:\\myworkspace\\Ftp\\checkCode\\" + (i+1) + ".bmp"));
		}
	}
	
	/**
	 * 切割图片(对于数据不重叠有效)
	 * @param img
	 * @return
	 * @throws IOException 
	 */
	public static BufferedImage[] cutter(BufferedImage image) throws IOException
	{
		BufferedImage checkCode[] = null;
        int height = image.getHeight();
        int width = image.getWidth();
        
        List<List<Integer>> all = new ArrayList<List<Integer>>();
        List<Integer> tmp = null;
        
        //纵向扫描
        for(int w = 0; w < width - 0; w++)
        {
        	int h = 0;
        	for(; h < height - 0; h++)
        	{
        		int px = image.getRGB(w, h);
        		
        		//System.out.print(px == -1 ? "-" : "0");
        		//如果遇到非白	色，则记录该y值的值
        		if(px != -1)
        		{
        			if(tmp == null)
                	{
                		tmp = new ArrayList<Integer>();
                	}
        			
        			tmp.add(w);
        			break;
        		}
        	}
        	//如果tmp有记录值，并且上一次扫描中纵向没有任何颜色,那么将记录加入all并截段重计
        	//或者最后一个数据超过边框
        	if((tmp != null && (h == height)) || (w == (width - 1)))
        	{
        		all.add(tmp);
        		tmp = null;
        	}
        	//System.out.println();
        }
        
        checkCode = new BufferedImage[all.size()];
        
        for(int i = 0; i < all.size(); i++)
        {
        	List<Integer> list = all.get(i);
        	
        	if(list == null) continue;
        	
        	//开始y轴
        	int yStart = list.get(0);
        	//结束y轴
        	int yEnd = list.get(list.size() - 1);
        	
        	System.out.println(yStart + "," + yEnd);
        	
        	//截取开始与结束的记录
        	BufferedImage bimg = image.getSubimage(yStart, 0, yEnd - yStart, height);
        	
        	checkCode[i] = bimg;
        }
        
		return checkCode;
	}